Upgrade jsoncpp to 1.9.4

Bug: 170642246
Change-Id: Id1fae5a1b6421117f923c616718ee4b3571231e0
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 608d3f7..0f82a74 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
-ADD_SUBDIRECTORY(lib_json)
-IF(JSONCPP_WITH_TESTS)
-    ADD_SUBDIRECTORY(jsontestrunner)
-    ADD_SUBDIRECTORY(test_lib_json)
-ENDIF(JSONCPP_WITH_TESTS)
+add_subdirectory(lib_json)
+if(JSONCPP_WITH_TESTS)
+    add_subdirectory(jsontestrunner)
+    add_subdirectory(test_lib_json)
+endif()
diff --git a/src/jsontestrunner/CMakeLists.txt b/src/jsontestrunner/CMakeLists.txt
index dd8e217..1fc71ea 100644
--- a/src/jsontestrunner/CMakeLists.txt
+++ b/src/jsontestrunner/CMakeLists.txt
@@ -1,22 +1,51 @@
-FIND_PACKAGE(PythonInterp 2.6 REQUIRED)
+if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12.0)
+    # The new Python3 module is much more robust than the previous PythonInterp
+    find_package(Python3 COMPONENTS Interpreter)
+    # Set variables for backwards compatibility with cmake < 3.12.0
+    set(PYTHONINTERP_FOUND ${Python3_Interpreter_FOUND})
+    set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
+else()
+    set(Python_ADDITIONAL_VERSIONS 3.8)
+    find_package(PythonInterp 3)
+endif()
 
-IF(JSONCPP_LIB_BUILD_SHARED)
-  ADD_DEFINITIONS( -DJSON_DLL )
-ENDIF(JSONCPP_LIB_BUILD_SHARED)
+add_executable(jsontestrunner_exe
+    main.cpp
+)
 
-ADD_EXECUTABLE(jsontestrunner_exe
-               main.cpp
-               )
-TARGET_LINK_LIBRARIES(jsontestrunner_exe jsoncpp_lib)
-SET_TARGET_PROPERTIES(jsontestrunner_exe PROPERTIES OUTPUT_NAME jsontestrunner_exe)
+if(BUILD_SHARED_LIBS)
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12.0)
+        add_compile_definitions( JSON_DLL )
+    else()
+        add_definitions(-DJSON_DLL)
+    endif()
+    target_link_libraries(jsontestrunner_exe jsoncpp_lib)
+else()
+    target_link_libraries(jsontestrunner_exe jsoncpp_static)
+endif()
 
-IF(PYTHONINTERP_FOUND)
+set_target_properties(jsontestrunner_exe PROPERTIES OUTPUT_NAME jsontestrunner_exe)
+
+if(PYTHONINTERP_FOUND)
     # Run end to end parser/writer tests
-    SET(TEST_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../test)
-    SET(RUNJSONTESTS_PATH ${TEST_DIR}/runjsontests.py)
-    ADD_CUSTOM_TARGET(jsoncpp_readerwriter_tests ALL
-                      "${PYTHON_EXECUTABLE}" -B "${RUNJSONTESTS_PATH}" $<TARGET_FILE:jsontestrunner_exe> "${TEST_DIR}/data"
-                      DEPENDS jsontestrunner_exe jsoncpp_test
-                      )
-    ADD_CUSTOM_TARGET(jsoncpp_check DEPENDS jsoncpp_readerwriter_tests)
-ENDIF(PYTHONINTERP_FOUND)
+    set(TEST_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../test)
+    set(RUNJSONTESTS_PATH ${TEST_DIR}/runjsontests.py)
+
+    # Run unit tests in post-build
+    # (default cmake workflow hides away the test result into a file, resulting in poor dev workflow?!?)
+    add_custom_target(jsoncpp_readerwriter_tests
+        "${PYTHON_EXECUTABLE}" -B "${RUNJSONTESTS_PATH}" $<TARGET_FILE:jsontestrunner_exe> "${TEST_DIR}/data"
+        DEPENDS jsontestrunner_exe jsoncpp_test
+    )
+    add_custom_target(jsoncpp_check DEPENDS jsoncpp_readerwriter_tests)
+
+    ## Create tests for dashboard submission, allows easy review of CI results https://my.cdash.org/index.php?project=jsoncpp
+    add_test(NAME jsoncpp_readerwriter
+        COMMAND "${PYTHON_EXECUTABLE}" -B "${RUNJSONTESTS_PATH}" $<TARGET_FILE:jsontestrunner_exe> "${TEST_DIR}/data"
+        WORKING_DIRECTORY "${TEST_DIR}/data"
+    )
+    add_test(NAME jsoncpp_readerwriter_json_checker
+        COMMAND "${PYTHON_EXECUTABLE}" -B "${RUNJSONTESTS_PATH}" --with-json-checker  $<TARGET_FILE:jsontestrunner_exe> "${TEST_DIR}/data"
+        WORKING_DIRECTORY "${TEST_DIR}/data"
+    )
+endif()
diff --git a/src/jsontestrunner/main.cpp b/src/jsontestrunner/main.cpp
index ba98587..3452c59 100644
--- a/src/jsontestrunner/main.cpp
+++ b/src/jsontestrunner/main.cpp
@@ -1,39 +1,49 @@
-// Copyright 2007-2010 Baptiste Lepilleur
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
+#if defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#elif defined(_MSC_VER)
+#pragma warning(disable : 4996)
+#endif
+
 /* This executable is used for testing parser/writer using real JSON files.
  */
 
-#include <json/json.h>
 #include <algorithm> // sort
-#include <stdio.h>
+#include <cstdio>
+#include <iostream>
+#include <json/json.h>
+#include <memory>
+#include <sstream>
 
-#if defined(_MSC_VER) && _MSC_VER >= 1310
-#pragma warning(disable : 4996) // disable fopen deprecation warning
-#endif
+struct Options {
+  Json::String path;
+  Json::Features features;
+  bool parseOnly;
+  using writeFuncType = Json::String (*)(Json::Value const&);
+  writeFuncType write;
+};
 
-static std::string normalizeFloatingPointStr(double value) {
+static Json::String normalizeFloatingPointStr(double value) {
   char buffer[32];
-#if defined(_MSC_VER) && defined(__STDC_SECURE_LIB__)
-  sprintf_s(buffer, sizeof(buffer), "%.16g", value);
-#else
-  snprintf(buffer, sizeof(buffer), "%.16g", value);
-#endif
+  jsoncpp_snprintf(buffer, sizeof(buffer), "%.16g", value);
   buffer[sizeof(buffer) - 1] = 0;
-  std::string s(buffer);
-  std::string::size_type index = s.find_last_of("eE");
-  if (index != std::string::npos) {
-    std::string::size_type hasSign =
+  Json::String s(buffer);
+  Json::String::size_type index = s.find_last_of("eE");
+  if (index != Json::String::npos) {
+    Json::String::size_type hasSign =
         (s[index + 1] == '+' || s[index + 1] == '-') ? 1 : 0;
-    std::string::size_type exponentStartIndex = index + 1 + hasSign;
-    std::string normalized = s.substr(0, exponentStartIndex);
-    std::string::size_type indexDigit =
+    Json::String::size_type exponentStartIndex = index + 1 + hasSign;
+    Json::String normalized = s.substr(0, exponentStartIndex);
+    Json::String::size_type indexDigit =
         s.find_first_not_of('0', exponentStartIndex);
-    std::string exponent = "0";
-    if (indexDigit !=
-        std::string::npos) // There is an exponent different from 0
+    Json::String exponent = "0";
+    if (indexDigit != Json::String::npos) // There is an exponent different
+                                          // from 0
     {
       exponent = s.substr(indexDigit);
     }
@@ -42,25 +52,26 @@
   return s;
 }
 
-static std::string readInputTestFile(const char* path) {
+static Json::String readInputTestFile(const char* path) {
   FILE* file = fopen(path, "rb");
   if (!file)
-    return std::string("");
+    return "";
   fseek(file, 0, SEEK_END);
-  long size = ftell(file);
+  auto const size = ftell(file);
+  auto const usize = static_cast<size_t>(size);
   fseek(file, 0, SEEK_SET);
-  std::string text;
-  char* buffer = new char[size + 1];
+  auto buffer = new char[size + 1];
   buffer[size] = 0;
-  if (fread(buffer, 1, size, file) == (unsigned long)size)
+  Json::String text;
+  if (fread(buffer, 1, usize, file) == usize)
     text = buffer;
   fclose(file);
   delete[] buffer;
   return text;
 }
 
-static void
-printValueTree(FILE* fout, Json::Value& value, const std::string& path = ".") {
+static void printValueTree(FILE* fout, Json::Value& value,
+                           const Json::String& path = ".") {
   if (value.hasComment(Json::commentBefore)) {
     fprintf(fout, "%s\n", value.getComment(Json::commentBefore).c_str());
   }
@@ -69,21 +80,15 @@
     fprintf(fout, "%s=null\n", path.c_str());
     break;
   case Json::intValue:
-    fprintf(fout,
-            "%s=%s\n",
-            path.c_str(),
+    fprintf(fout, "%s=%s\n", path.c_str(),
             Json::valueToString(value.asLargestInt()).c_str());
     break;
   case Json::uintValue:
-    fprintf(fout,
-            "%s=%s\n",
-            path.c_str(),
+    fprintf(fout, "%s=%s\n", path.c_str(),
             Json::valueToString(value.asLargestUInt()).c_str());
     break;
   case Json::realValue:
-    fprintf(fout,
-            "%s=%s\n",
-            path.c_str(),
+    fprintf(fout, "%s=%s\n", path.c_str(),
             normalizeFloatingPointStr(value.asDouble()).c_str());
     break;
   case Json::stringValue:
@@ -94,14 +99,10 @@
     break;
   case Json::arrayValue: {
     fprintf(fout, "%s=[]\n", path.c_str());
-    int size = value.size();
-    for (int index = 0; index < size; ++index) {
+    Json::ArrayIndex size = value.size();
+    for (Json::ArrayIndex index = 0; index < size; ++index) {
       static char buffer[16];
-#if defined(_MSC_VER) && defined(__STDC_SECURE_LIB__)
-      sprintf_s(buffer, sizeof(buffer), "[%d]", index);
-#else
-      snprintf(buffer, sizeof(buffer), "[%d]", index);
-#endif
+      jsoncpp_snprintf(buffer, sizeof(buffer), "[%u]", index);
       printValueTree(fout, value[index], path + buffer);
     }
   } break;
@@ -109,11 +110,8 @@
     fprintf(fout, "%s={}\n", path.c_str());
     Json::Value::Members members(value.getMemberNames());
     std::sort(members.begin(), members.end());
-    std::string suffix = *(path.end() - 1) == '.' ? "" : ".";
-    for (Json::Value::Members::iterator it = members.begin();
-         it != members.end();
-         ++it) {
-      const std::string& name = *it;
+    Json::String suffix = *(path.end() - 1) == '.' ? "" : ".";
+    for (const auto& name : members) {
       printValueTree(fout, value[name], path + suffix + name);
     }
   } break;
@@ -126,152 +124,219 @@
   }
 }
 
-static int parseAndSaveValueTree(const std::string& input,
-                                 const std::string& actual,
-                                 const std::string& kind,
-                                 Json::Value& root,
-                                 const Json::Features& features,
-                                 bool parseOnly) {
-  Json::Reader reader(features);
-  bool parsingSuccessful = reader.parse(input, root);
-  if (!parsingSuccessful) {
-    printf("Failed to parse %s file: \n%s\n",
-           kind.c_str(),
-           reader.getFormattedErrorMessages().c_str());
-    return 1;
+static int parseAndSaveValueTree(const Json::String& input,
+                                 const Json::String& actual,
+                                 const Json::String& kind,
+                                 const Json::Features& features, bool parseOnly,
+                                 Json::Value* root, bool use_legacy) {
+  if (!use_legacy) {
+    Json::CharReaderBuilder builder;
+
+    builder.settings_["allowComments"] = features.allowComments_;
+    builder.settings_["strictRoot"] = features.strictRoot_;
+    builder.settings_["allowDroppedNullPlaceholders"] =
+        features.allowDroppedNullPlaceholders_;
+    builder.settings_["allowNumericKeys"] = features.allowNumericKeys_;
+
+    std::unique_ptr<Json::CharReader> reader(builder.newCharReader());
+    Json::String errors;
+    const bool parsingSuccessful =
+        reader->parse(input.data(), input.data() + input.size(), root, &errors);
+
+    if (!parsingSuccessful) {
+      std::cerr << "Failed to parse " << kind << " file: " << std::endl
+                << errors << std::endl;
+      return 1;
+    }
+
+    // We may instead check the legacy implementation (to ensure it doesn't
+    // randomly get broken).
+  } else {
+    Json::Reader reader(features);
+    const bool parsingSuccessful =
+        reader.parse(input.data(), input.data() + input.size(), *root);
+    if (!parsingSuccessful) {
+      std::cerr << "Failed to parse " << kind << " file: " << std::endl
+                << reader.getFormatedErrorMessages() << std::endl;
+      return 1;
+    }
   }
 
   if (!parseOnly) {
     FILE* factual = fopen(actual.c_str(), "wt");
     if (!factual) {
-      printf("Failed to create %s actual file.\n", kind.c_str());
+      std::cerr << "Failed to create '" << kind << "' actual file."
+                << std::endl;
       return 2;
     }
-    printValueTree(factual, root);
+    printValueTree(factual, *root);
     fclose(factual);
   }
   return 0;
 }
-
-static int rewriteValueTree(const std::string& rewritePath,
-                            const Json::Value& root,
-                            std::string& rewrite) {
-  // Json::FastWriter writer;
-  // writer.enableYAMLCompatibility();
+// static Json::String useFastWriter(Json::Value const& root) {
+//   Json::FastWriter writer;
+//   writer.enableYAMLCompatibility();
+//   return writer.write(root);
+// }
+static Json::String useStyledWriter(Json::Value const& root) {
   Json::StyledWriter writer;
-  rewrite = writer.write(root);
+  return writer.write(root);
+}
+static Json::String useStyledStreamWriter(Json::Value const& root) {
+  Json::StyledStreamWriter writer;
+  Json::OStringStream sout;
+  writer.write(sout, root);
+  return sout.str();
+}
+static Json::String useBuiltStyledStreamWriter(Json::Value const& root) {
+  Json::StreamWriterBuilder builder;
+  return Json::writeString(builder, root);
+}
+static int rewriteValueTree(const Json::String& rewritePath,
+                            const Json::Value& root,
+                            Options::writeFuncType write,
+                            Json::String* rewrite) {
+  *rewrite = write(root);
   FILE* fout = fopen(rewritePath.c_str(), "wt");
   if (!fout) {
-    printf("Failed to create rewrite file: %s\n", rewritePath.c_str());
+    std::cerr << "Failed to create rewrite file: " << rewritePath << std::endl;
     return 2;
   }
-  fprintf(fout, "%s\n", rewrite.c_str());
+  fprintf(fout, "%s\n", rewrite->c_str());
   fclose(fout);
   return 0;
 }
 
-static std::string removeSuffix(const std::string& path,
-                                const std::string& extension) {
+static Json::String removeSuffix(const Json::String& path,
+                                 const Json::String& extension) {
   if (extension.length() >= path.length())
-    return std::string("");
-  std::string suffix = path.substr(path.length() - extension.length());
+    return Json::String("");
+  Json::String suffix = path.substr(path.length() - extension.length());
   if (suffix != extension)
-    return std::string("");
+    return Json::String("");
   return path.substr(0, path.length() - extension.length());
 }
 
 static void printConfig() {
 // Print the configuration used to compile JsonCpp
 #if defined(JSON_NO_INT64)
-  printf("JSON_NO_INT64=1\n");
+  std::cout << "JSON_NO_INT64=1" << std::endl;
 #else
-  printf("JSON_NO_INT64=0\n");
+  std::cout << "JSON_NO_INT64=0" << std::endl;
 #endif
 }
 
 static int printUsage(const char* argv[]) {
-  printf("Usage: %s [--strict] input-json-file", argv[0]);
+  std::cout << "Usage: " << argv[0] << " [--strict] input-json-file"
+            << std::endl;
   return 3;
 }
 
-int parseCommandLine(int argc,
-                     const char* argv[],
-                     Json::Features& features,
-                     std::string& path,
-                     bool& parseOnly) {
-  parseOnly = false;
+static int parseCommandLine(int argc, const char* argv[], Options* opts) {
+  opts->parseOnly = false;
+  opts->write = &useStyledWriter;
   if (argc < 2) {
     return printUsage(argv);
   }
-
   int index = 1;
-  if (std::string(argv[1]) == "--json-checker") {
-    features = Json::Features::strictMode();
-    parseOnly = true;
+  if (Json::String(argv[index]) == "--json-checker") {
+    opts->features = Json::Features::strictMode();
+    opts->parseOnly = true;
     ++index;
   }
-
-  if (std::string(argv[1]) == "--json-config") {
+  if (Json::String(argv[index]) == "--json-config") {
     printConfig();
     return 3;
   }
-
+  if (Json::String(argv[index]) == "--json-writer") {
+    ++index;
+    Json::String const writerName(argv[index++]);
+    if (writerName == "StyledWriter") {
+      opts->write = &useStyledWriter;
+    } else if (writerName == "StyledStreamWriter") {
+      opts->write = &useStyledStreamWriter;
+    } else if (writerName == "BuiltStyledStreamWriter") {
+      opts->write = &useBuiltStyledStreamWriter;
+    } else {
+      std::cerr << "Unknown '--json-writer' " << writerName << std::endl;
+      return 4;
+    }
+  }
   if (index == argc || index + 1 < argc) {
     return printUsage(argv);
   }
-
-  path = argv[index];
+  opts->path = argv[index];
   return 0;
 }
 
-int main(int argc, const char* argv[]) {
-  std::string path;
-  Json::Features features;
-  bool parseOnly;
-  int exitCode = parseCommandLine(argc, argv, features, path, parseOnly);
-  if (exitCode != 0) {
+static int runTest(Options const& opts, bool use_legacy) {
+  int exitCode = 0;
+
+  Json::String input = readInputTestFile(opts.path.c_str());
+  if (input.empty()) {
+    std::cerr << "Invalid input file: " << opts.path << std::endl;
+    return 3;
+  }
+
+  Json::String basePath = removeSuffix(opts.path, ".json");
+  if (!opts.parseOnly && basePath.empty()) {
+    std::cerr << "Bad input path '" << opts.path
+              << "'. Must end with '.expected'" << std::endl;
+    return 3;
+  }
+
+  Json::String const actualPath = basePath + ".actual";
+  Json::String const rewritePath = basePath + ".rewrite";
+  Json::String const rewriteActualPath = basePath + ".actual-rewrite";
+
+  Json::Value root;
+  exitCode = parseAndSaveValueTree(input, actualPath, "input", opts.features,
+                                   opts.parseOnly, &root, use_legacy);
+  if (exitCode || opts.parseOnly) {
     return exitCode;
   }
 
-  try {
-    std::string input = readInputTestFile(path.c_str());
-    if (input.empty()) {
-      printf("Failed to read input or empty input: %s\n", path.c_str());
-      return 3;
-    }
-
-    std::string basePath = removeSuffix(argv[1], ".json");
-    if (!parseOnly && basePath.empty()) {
-      printf("Bad input path. Path does not end with '.expected':\n%s\n",
-             path.c_str());
-      return 3;
-    }
-
-    std::string actualPath = basePath + ".actual";
-    std::string rewritePath = basePath + ".rewrite";
-    std::string rewriteActualPath = basePath + ".actual-rewrite";
-
-    Json::Value root;
-    exitCode = parseAndSaveValueTree(
-        input, actualPath, "input", root, features, parseOnly);
-    if (exitCode == 0 && !parseOnly) {
-      std::string rewrite;
-      exitCode = rewriteValueTree(rewritePath, root, rewrite);
-      if (exitCode == 0) {
-        Json::Value rewriteRoot;
-        exitCode = parseAndSaveValueTree(rewrite,
-                                         rewriteActualPath,
-                                         "rewrite",
-                                         rewriteRoot,
-                                         features,
-                                         parseOnly);
-      }
-    }
+  Json::String rewrite;
+  exitCode = rewriteValueTree(rewritePath, root, opts.write, &rewrite);
+  if (exitCode) {
+    return exitCode;
   }
-  catch (const std::exception& e) {
-    printf("Unhandled exception:\n%s\n", e.what());
-    exitCode = 1;
-  }
+
+  Json::Value rewriteRoot;
+  exitCode = parseAndSaveValueTree(rewrite, rewriteActualPath, "rewrite",
+                                   opts.features, opts.parseOnly, &rewriteRoot,
+                                   use_legacy);
 
   return exitCode;
 }
+
+int main(int argc, const char* argv[]) {
+  Options opts;
+  try {
+    int exitCode = parseCommandLine(argc, argv, &opts);
+    if (exitCode != 0) {
+      std::cerr << "Failed to parse command-line." << std::endl;
+      return exitCode;
+    }
+
+    const int modern_return_code = runTest(opts, false);
+    if (modern_return_code) {
+      return modern_return_code;
+    }
+
+    const std::string filename =
+        opts.path.substr(opts.path.find_last_of("\\/") + 1);
+    const bool should_run_legacy = (filename.rfind("legacy_", 0) == 0);
+    if (should_run_legacy) {
+      return runTest(opts, true);
+    }
+  } catch (const std::exception& e) {
+    std::cerr << "Unhandled exception:" << std::endl << e.what() << std::endl;
+    return 1;
+  }
+}
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
diff --git a/src/jsontestrunner/sconscript b/src/jsontestrunner/sconscript
deleted file mode 100644
index 6e68e31..0000000
--- a/src/jsontestrunner/sconscript
+++ /dev/null
@@ -1,9 +0,0 @@
-Import( 'env_testing buildJSONTests' )
-
-buildJSONTests( env_testing, Split( """
-    main.cpp
-     """ ),
-    'jsontestrunner' )
-
-# For 'check' to work, 'libs' must be built first.
-env_testing.Depends('jsontestrunner', '#libs')
diff --git a/src/lib_json/CMakeLists.txt b/src/lib_json/CMakeLists.txt
index 418044d..af26476 100644
--- a/src/lib_json/CMakeLists.txt
+++ b/src/lib_json/CMakeLists.txt
@@ -1,57 +1,220 @@
-OPTION(JSONCPP_LIB_BUILD_SHARED "Build jsoncpp_lib as a shared library." OFF)
-IF(JSONCPP_LIB_BUILD_SHARED)
-  SET(JSONCPP_LIB_TYPE SHARED)
-  ADD_DEFINITIONS( -DJSON_DLL_BUILD )
-ELSE(JSONCPP_LIB_BUILD_SHARED)
-  SET(JSONCPP_LIB_TYPE STATIC)
-ENDIF(JSONCPP_LIB_BUILD_SHARED)
+if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.1.2)
+    #-Werror=* was introduced -after- GCC 4.1.2
+    add_compile_options("-Werror=strict-aliasing")
+endif()
 
+include(CheckIncludeFileCXX)
+include(CheckTypeSize)
+include(CheckStructHasMember)
+include(CheckCXXSymbolExists)
 
-if( CMAKE_COMPILER_IS_GNUCXX )
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror=strict-aliasing")
-endif( CMAKE_COMPILER_IS_GNUCXX )
+check_include_file_cxx(clocale HAVE_CLOCALE)
+check_cxx_symbol_exists(localeconv clocale HAVE_LOCALECONV)
 
-SET( JSONCPP_INCLUDE_DIR ../../include )
+if(CMAKE_VERSION VERSION_LESS 3.0.0)
+    # The "LANGUAGE CXX" parameter is not supported in CMake versions below 3,
+    # so the C compiler and header has to be used.
+    check_include_file(locale.h HAVE_LOCALE_H)
+    set(CMAKE_EXTRA_INCLUDE_FILES locale.h)
+    check_type_size("struct lconv" LCONV_SIZE)
+    unset(CMAKE_EXTRA_INCLUDE_FILES)
+    check_struct_has_member("struct lconv" decimal_point locale.h HAVE_DECIMAL_POINT)
+else()
+    set(CMAKE_EXTRA_INCLUDE_FILES clocale)
+    check_type_size(lconv LCONV_SIZE LANGUAGE CXX)
+    unset(CMAKE_EXTRA_INCLUDE_FILES)
+    check_struct_has_member(lconv decimal_point clocale HAVE_DECIMAL_POINT LANGUAGE CXX)
+endif()
 
-SET( PUBLIC_HEADERS
+if(NOT (HAVE_CLOCALE AND HAVE_LCONV_SIZE AND HAVE_DECIMAL_POINT AND HAVE_LOCALECONV))
+    message(WARNING "Locale functionality is not supported")
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12.0)
+        add_compile_definitions(JSONCPP_NO_LOCALE_SUPPORT)
+    else()
+        add_definitions(-DJSONCPP_NO_LOCALE_SUPPORT)
+    endif()
+endif()
+
+set(JSONCPP_INCLUDE_DIR ../../include)
+
+set(PUBLIC_HEADERS
     ${JSONCPP_INCLUDE_DIR}/json/config.h
     ${JSONCPP_INCLUDE_DIR}/json/forwards.h
-    ${JSONCPP_INCLUDE_DIR}/json/features.h
+    ${JSONCPP_INCLUDE_DIR}/json/json_features.h
     ${JSONCPP_INCLUDE_DIR}/json/value.h
     ${JSONCPP_INCLUDE_DIR}/json/reader.h
+    ${JSONCPP_INCLUDE_DIR}/json/version.h
     ${JSONCPP_INCLUDE_DIR}/json/writer.h
     ${JSONCPP_INCLUDE_DIR}/json/assertions.h
-    ${JSONCPP_INCLUDE_DIR}/json/version.h
-    )
+)
 
-SOURCE_GROUP( "Public API" FILES ${PUBLIC_HEADERS} )
+source_group("Public API" FILES ${PUBLIC_HEADERS})
 
-ADD_LIBRARY( jsoncpp_lib ${JSONCPP_LIB_TYPE}
-             ${PUBLIC_HEADERS} 
-             json_tool.h
-             json_reader.cpp
-             json_batchallocator.h
-             json_valueiterator.inl
-             json_value.cpp
-             json_writer.cpp
-             version.h.in
-             )
-SET_TARGET_PROPERTIES( jsoncpp_lib PROPERTIES OUTPUT_NAME jsoncpp )
-SET_TARGET_PROPERTIES( jsoncpp_lib PROPERTIES VERSION ${JSONCPP_VERSION} SOVERSION ${JSONCPP_VERSION_MAJOR} )
+set(JSONCPP_SOURCES
+    json_tool.h
+    json_reader.cpp
+    json_valueiterator.inl
+    json_value.cpp
+    json_writer.cpp
+)
 
 # Install instructions for this target
-IF(JSONCPP_WITH_CMAKE_PACKAGE)
-    TARGET_INCLUDE_DIRECTORIES( jsoncpp_lib
-                                PUBLIC $<INSTALL_INTERFACE:${INCLUDE_INSTALL_DIR}>
-                                       $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/${JSON_INCLUDE_DIR}>
-                                )
-    SET(INSTALL_EXPORT EXPORT jsoncpp)
-ELSE(JSONCPP_WITH_CMAKE_PACKAGE)
-    SET(INSTALL_EXPORT)
-ENDIF(JSONCPP_WITH_CMAKE_PACKAGE)
+if(JSONCPP_WITH_CMAKE_PACKAGE)
+    set(INSTALL_EXPORT EXPORT jsoncpp)
+else()
+    set(INSTALL_EXPORT)
+endif()
 
-INSTALL( TARGETS jsoncpp_lib ${INSTALL_EXPORT}
-         RUNTIME DESTINATION ${RUNTIME_INSTALL_DIR}
-         LIBRARY DESTINATION ${LIBRARY_INSTALL_DIR}
-         ARCHIVE DESTINATION ${ARCHIVE_INSTALL_DIR}
+# Specify compiler features required when compiling a given target.
+# See https://cmake.org/cmake/help/v3.1/prop_gbl/CMAKE_CXX_KNOWN_FEATURES.html#prop_gbl:CMAKE_CXX_KNOWN_FEATURES
+# for complete list of features available
+list(APPEND REQUIRED_FEATURES
+        cxx_std_11 # Compiler mode is aware of C++ 11.
+        #MSVC 1900 cxx_alignas # Alignment control alignas, as defined in N2341.
+        #MSVC 1900 cxx_alignof # Alignment control alignof, as defined in N2341.
+        #MSVC 1900 cxx_attributes # Generic attributes, as defined in N2761.
+        cxx_auto_type # Automatic type deduction, as defined in N1984.
+        #MSVC 1900 cxx_constexpr # Constant expressions, as defined in N2235.
+        cxx_decltype # Decltype, as defined in N2343.
+        cxx_default_function_template_args # Default template arguments for function templates, as defined in DR226
+        cxx_defaulted_functions # Defaulted functions, as defined in N2346.
+        #MSVC 1900 cxx_defaulted_move_initializers # Defaulted move initializers, as defined in N3053.
+        cxx_delegating_constructors # Delegating constructors, as defined in N1986.
+        #MSVC 1900 cxx_deleted_functions # Deleted functions, as defined in N2346.
+        cxx_enum_forward_declarations # Enum forward declarations, as defined in N2764.
+        cxx_explicit_conversions # Explicit conversion operators, as defined in N2437.
+        cxx_extended_friend_declarations # Extended friend declarations, as defined in N1791.
+        cxx_extern_templates # Extern templates, as defined in N1987.
+        cxx_final # Override control final keyword, as defined in N2928, N3206 and N3272.
+        #MSVC 1900 cxx_func_identifier # Predefined __func__ identifier, as defined in N2340.
+        #MSVC 1900 cxx_generalized_initializers # Initializer lists, as defined in N2672.
+        #MSVC 1900 cxx_inheriting_constructors # Inheriting constructors, as defined in N2540.
+        #MSVC 1900 cxx_inline_namespaces # Inline namespaces, as defined in N2535.
+        cxx_lambdas # Lambda functions, as defined in N2927.
+        #MSVC 1900 cxx_local_type_template_args # Local and unnamed types as template arguments, as defined in N2657.
+        cxx_long_long_type # long long type, as defined in N1811.
+        #MSVC 1900 cxx_noexcept # Exception specifications, as defined in N3050.
+        #MSVC 1900 cxx_nonstatic_member_init # Non-static data member initialization, as defined in N2756.
+        cxx_nullptr # Null pointer, as defined in N2431.
+        cxx_override # Override control override keyword, as defined in N2928, N3206 and N3272.
+        cxx_range_for # Range-based for, as defined in N2930.
+        cxx_raw_string_literals # Raw string literals, as defined in N2442.
+        #MSVC 1900 cxx_reference_qualified_functions # Reference qualified functions, as defined in N2439.
+        cxx_right_angle_brackets # Right angle bracket parsing, as defined in N1757.
+        cxx_rvalue_references # R-value references, as defined in N2118.
+        #MSVC 1900 cxx_sizeof_member # Size of non-static data members, as defined in N2253.
+        cxx_static_assert # Static assert, as defined in N1720.
+        cxx_strong_enums # Strongly typed enums, as defined in N2347.
+        #MSVC 1900 cxx_thread_local # Thread-local variables, as defined in N2659.
+        cxx_trailing_return_types # Automatic function return type, as defined in N2541.
+        #MSVC 1900 cxx_unicode_literals # Unicode string literals, as defined in N2442.
+        cxx_uniform_initialization # Uniform initialization, as defined in N2640.
+        #MSVC 1900 cxx_unrestricted_unions # Unrestricted unions, as defined in N2544.
+        #MSVC 1900 cxx_user_literals # User-defined literals, as defined in N2765.
+        cxx_variadic_macros # Variadic macros, as defined in N1653.
+        cxx_variadic_templates # Variadic templates, as defined in N2242.
 )
+
+
+if(BUILD_SHARED_LIBS)
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12.0)
+        add_compile_definitions(JSON_DLL_BUILD)
+    else()
+        add_definitions(-DJSON_DLL_BUILD)
+    endif()
+
+    set(SHARED_LIB ${PROJECT_NAME}_lib)
+    add_library(${SHARED_LIB} SHARED ${PUBLIC_HEADERS} ${JSONCPP_SOURCES})
+    set_target_properties(${SHARED_LIB} PROPERTIES
+        OUTPUT_NAME jsoncpp
+        VERSION ${PROJECT_VERSION}
+        SOVERSION ${PROJECT_SOVERSION}
+        POSITION_INDEPENDENT_CODE ON
+    )
+
+    # Set library's runtime search path on OSX
+    if(APPLE)
+        set_target_properties(${SHARED_LIB} PROPERTIES INSTALL_RPATH "@loader_path/.")
+    endif()
+
+    target_compile_features(${SHARED_LIB} PUBLIC ${REQUIRED_FEATURES})
+
+    if(NOT CMAKE_VERSION VERSION_LESS 2.8.11)
+        target_include_directories(${SHARED_LIB} PUBLIC
+            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+            $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/${JSONCPP_INCLUDE_DIR}>
+            $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include/json>
+        )
+    endif()
+
+    list(APPEND CMAKE_TARGETS ${SHARED_LIB})
+endif()
+
+if(BUILD_STATIC_LIBS)
+    set(STATIC_LIB ${PROJECT_NAME}_static)
+    add_library(${STATIC_LIB} STATIC ${PUBLIC_HEADERS} ${JSONCPP_SOURCES})
+
+    # avoid name clashes on windows as the shared import lib is alse named jsoncpp.lib
+    if(NOT DEFINED STATIC_SUFFIX AND BUILD_SHARED_LIBS)
+        set(STATIC_SUFFIX "_static")
+    endif()
+
+    set_target_properties(${STATIC_LIB} PROPERTIES
+        OUTPUT_NAME jsoncpp${STATIC_SUFFIX}
+        VERSION ${PROJECT_VERSION}
+    )
+
+    # Set library's runtime search path on OSX
+    if(APPLE)
+        set_target_properties(${STATIC_LIB} PROPERTIES INSTALL_RPATH "@loader_path/.")
+    endif()
+
+    target_compile_features(${STATIC_LIB} PUBLIC ${REQUIRED_FEATURES})
+
+    if(NOT CMAKE_VERSION VERSION_LESS 2.8.11)
+        target_include_directories(${STATIC_LIB} PUBLIC
+            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+            $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/${JSONCPP_INCLUDE_DIR}>
+            $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include/json>
+        )
+    endif()
+
+    list(APPEND CMAKE_TARGETS ${STATIC_LIB})
+endif()
+
+if(BUILD_OBJECT_LIBS)
+    set(OBJECT_LIB ${PROJECT_NAME}_object)
+    add_library(${OBJECT_LIB} OBJECT ${PUBLIC_HEADERS} ${JSONCPP_SOURCES})
+
+    set_target_properties(${OBJECT_LIB} PROPERTIES
+        OUTPUT_NAME jsoncpp
+        VERSION ${PROJECT_VERSION}
+        SOVERSION ${PROJECT_SOVERSION}
+        POSITION_INDEPENDENT_CODE ON
+    )
+
+    # Set library's runtime search path on OSX
+    if(APPLE)
+        set_target_properties(${OBJECT_LIB} PROPERTIES INSTALL_RPATH "@loader_path/.")
+    endif()
+
+    target_compile_features(${OBJECT_LIB} PUBLIC ${REQUIRED_FEATURES})
+
+    if(NOT CMAKE_VERSION VERSION_LESS 2.8.11)
+        target_include_directories(${OBJECT_LIB} PUBLIC
+            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+            $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/${JSONCPP_INCLUDE_DIR}>
+            $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include/json>
+        )
+    endif()
+
+    list(APPEND CMAKE_TARGETS ${OBJECT_LIB})
+endif()
+
+install(TARGETS ${CMAKE_TARGETS} ${INSTALL_EXPORT}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    OBJECTS DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
+
diff --git a/src/lib_json/json_batchallocator.h b/src/lib_json/json_batchallocator.h
deleted file mode 100644
index 2fbef7a..0000000
--- a/src/lib_json/json_batchallocator.h
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2007-2010 Baptiste Lepilleur
-// Distributed under MIT license, or public domain if desired and
-// recognized in your jurisdiction.
-// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
-
-#ifndef JSONCPP_BATCHALLOCATOR_H_INCLUDED
-#define JSONCPP_BATCHALLOCATOR_H_INCLUDED
-
-#include <stdlib.h>
-#include <assert.h>
-
-#ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
-
-namespace Json {
-
-/* Fast memory allocator.
- *
- * This memory allocator allocates memory for a batch of object (specified by
- * the page size, the number of object in each page).
- *
- * It does not allow the destruction of a single object. All the allocated
- * objects can be destroyed at once. The memory can be either released or reused
- * for future allocation.
- *
- * The in-place new operator must be used to construct the object using the
- * pointer returned by allocate.
- */
-template <typename AllocatedType, const unsigned int objectPerAllocation>
-class BatchAllocator {
-public:
-  BatchAllocator(unsigned int objectsPerPage = 255)
-      : freeHead_(0), objectsPerPage_(objectsPerPage) {
-    //      printf( "Size: %d => %s\n", sizeof(AllocatedType),
-    // typeid(AllocatedType).name() );
-    assert(sizeof(AllocatedType) * objectPerAllocation >=
-           sizeof(AllocatedType*)); // We must be able to store a slist in the
-                                    // object free space.
-    assert(objectsPerPage >= 16);
-    batches_ = allocateBatch(0); // allocated a dummy page
-    currentBatch_ = batches_;
-  }
-
-  ~BatchAllocator() {
-    for (BatchInfo* batch = batches_; batch;) {
-      BatchInfo* nextBatch = batch->next_;
-      free(batch);
-      batch = nextBatch;
-    }
-  }
-
-  /// allocate space for an array of objectPerAllocation object.
-  /// @warning it is the responsability of the caller to call objects
-  /// constructors.
-  AllocatedType* allocate() {
-    if (freeHead_) // returns node from free list.
-    {
-      AllocatedType* object = freeHead_;
-      freeHead_ = *(AllocatedType**)object;
-      return object;
-    }
-    if (currentBatch_->used_ == currentBatch_->end_) {
-      currentBatch_ = currentBatch_->next_;
-      while (currentBatch_ && currentBatch_->used_ == currentBatch_->end_)
-        currentBatch_ = currentBatch_->next_;
-
-      if (!currentBatch_) // no free batch found, allocate a new one
-      {
-        currentBatch_ = allocateBatch(objectsPerPage_);
-        currentBatch_->next_ = batches_; // insert at the head of the list
-        batches_ = currentBatch_;
-      }
-    }
-    AllocatedType* allocated = currentBatch_->used_;
-    currentBatch_->used_ += objectPerAllocation;
-    return allocated;
-  }
-
-  /// Release the object.
-  /// @warning it is the responsability of the caller to actually destruct the
-  /// object.
-  void release(AllocatedType* object) {
-    assert(object != 0);
-    *(AllocatedType**)object = freeHead_;
-    freeHead_ = object;
-  }
-
-private:
-  struct BatchInfo {
-    BatchInfo* next_;
-    AllocatedType* used_;
-    AllocatedType* end_;
-    AllocatedType buffer_[objectPerAllocation];
-  };
-
-  // disabled copy constructor and assignement operator.
-  BatchAllocator(const BatchAllocator&);
-  void operator=(const BatchAllocator&);
-
-  static BatchInfo* allocateBatch(unsigned int objectsPerPage) {
-    const unsigned int mallocSize =
-        sizeof(BatchInfo) - sizeof(AllocatedType) * objectPerAllocation +
-        sizeof(AllocatedType) * objectPerAllocation * objectsPerPage;
-    BatchInfo* batch = static_cast<BatchInfo*>(malloc(mallocSize));
-    batch->next_ = 0;
-    batch->used_ = batch->buffer_;
-    batch->end_ = batch->buffer_ + objectsPerPage;
-    return batch;
-  }
-
-  BatchInfo* batches_;
-  BatchInfo* currentBatch_;
-  /// Head of a single linked list within the allocated space of freeed object
-  AllocatedType* freeHead_;
-  unsigned int objectsPerPage_;
-};
-
-} // namespace Json
-
-#endif // ifndef JSONCPP_DOC_INCLUDE_IMPLEMENTATION
-
-#endif // JSONCPP_BATCHALLOCATOR_H_INCLUDED
diff --git a/src/lib_json/json_internalarray.inl b/src/lib_json/json_internalarray.inl
deleted file mode 100644
index 9ee15e9..0000000
--- a/src/lib_json/json_internalarray.inl
+++ /dev/null
@@ -1,360 +0,0 @@
-// Copyright 2007-2010 Baptiste Lepilleur
-// Distributed under MIT license, or public domain if desired and
-// recognized in your jurisdiction.
-// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
-
-// included by json_value.cpp
-
-namespace Json {
-
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// class ValueInternalArray
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-
-ValueArrayAllocator::~ValueArrayAllocator() {}
-
-// //////////////////////////////////////////////////////////////////
-// class DefaultValueArrayAllocator
-// //////////////////////////////////////////////////////////////////
-#ifdef JSON_USE_SIMPLE_INTERNAL_ALLOCATOR
-class DefaultValueArrayAllocator : public ValueArrayAllocator {
-public: // overridden from ValueArrayAllocator
-  virtual ~DefaultValueArrayAllocator() {}
-
-  virtual ValueInternalArray* newArray() { return new ValueInternalArray(); }
-
-  virtual ValueInternalArray* newArrayCopy(const ValueInternalArray& other) {
-    return new ValueInternalArray(other);
-  }
-
-  virtual void destructArray(ValueInternalArray* array) { delete array; }
-
-  virtual void
-  reallocateArrayPageIndex(Value**& indexes,
-                           ValueInternalArray::PageIndex& indexCount,
-                           ValueInternalArray::PageIndex minNewIndexCount) {
-    ValueInternalArray::PageIndex newIndexCount = (indexCount * 3) / 2 + 1;
-    if (minNewIndexCount > newIndexCount)
-      newIndexCount = minNewIndexCount;
-    void* newIndexes = realloc(indexes, sizeof(Value*) * newIndexCount);
-    JSON_ASSERT_MESSAGE(newIndexes, "Couldn't realloc.");
-    indexCount = newIndexCount;
-    indexes = static_cast<Value**>(newIndexes);
-  }
-  virtual void releaseArrayPageIndex(Value** indexes,
-                                     ValueInternalArray::PageIndex indexCount) {
-    if (indexes)
-      free(indexes);
-  }
-
-  virtual Value* allocateArrayPage() {
-    return static_cast<Value*>(
-        malloc(sizeof(Value) * ValueInternalArray::itemsPerPage));
-  }
-
-  virtual void releaseArrayPage(Value* value) {
-    if (value)
-      free(value);
-  }
-};
-
-#else  // #ifdef JSON_USE_SIMPLE_INTERNAL_ALLOCATOR
-/// @todo make this thread-safe (lock when accessign batch allocator)
-class DefaultValueArrayAllocator : public ValueArrayAllocator {
-public: // overridden from ValueArrayAllocator
-  virtual ~DefaultValueArrayAllocator() {}
-
-  virtual ValueInternalArray* newArray() {
-    ValueInternalArray* array = arraysAllocator_.allocate();
-    new (array) ValueInternalArray(); // placement new
-    return array;
-  }
-
-  virtual ValueInternalArray* newArrayCopy(const ValueInternalArray& other) {
-    ValueInternalArray* array = arraysAllocator_.allocate();
-    new (array) ValueInternalArray(other); // placement new
-    return array;
-  }
-
-  virtual void destructArray(ValueInternalArray* array) {
-    if (array) {
-      array->~ValueInternalArray();
-      arraysAllocator_.release(array);
-    }
-  }
-
-  virtual void
-  reallocateArrayPageIndex(Value**& indexes,
-                           ValueInternalArray::PageIndex& indexCount,
-                           ValueInternalArray::PageIndex minNewIndexCount) {
-    ValueInternalArray::PageIndex newIndexCount = (indexCount * 3) / 2 + 1;
-    if (minNewIndexCount > newIndexCount)
-      newIndexCount = minNewIndexCount;
-    void* newIndexes = realloc(indexes, sizeof(Value*) * newIndexCount);
-    JSON_ASSERT_MESSAGE(newIndexes, "Couldn't realloc.");
-    indexCount = newIndexCount;
-    indexes = static_cast<Value**>(newIndexes);
-  }
-  virtual void releaseArrayPageIndex(Value** indexes,
-                                     ValueInternalArray::PageIndex indexCount) {
-    if (indexes)
-      free(indexes);
-  }
-
-  virtual Value* allocateArrayPage() {
-    return static_cast<Value*>(pagesAllocator_.allocate());
-  }
-
-  virtual void releaseArrayPage(Value* value) {
-    if (value)
-      pagesAllocator_.release(value);
-  }
-
-private:
-  BatchAllocator<ValueInternalArray, 1> arraysAllocator_;
-  BatchAllocator<Value, ValueInternalArray::itemsPerPage> pagesAllocator_;
-};
-#endif // #ifdef JSON_USE_SIMPLE_INTERNAL_ALLOCATOR
-
-static ValueArrayAllocator*& arrayAllocator() {
-  static DefaultValueArrayAllocator defaultAllocator;
-  static ValueArrayAllocator* arrayAllocator = &defaultAllocator;
-  return arrayAllocator;
-}
-
-static struct DummyArrayAllocatorInitializer {
-  DummyArrayAllocatorInitializer() {
-    arrayAllocator(); // ensure arrayAllocator() statics are initialized before
-                      // main().
-  }
-} dummyArrayAllocatorInitializer;
-
-// //////////////////////////////////////////////////////////////////
-// class ValueInternalArray
-// //////////////////////////////////////////////////////////////////
-bool ValueInternalArray::equals(const IteratorState& x,
-                                const IteratorState& other) {
-  return x.array_ == other.array_ &&
-         x.currentItemIndex_ == other.currentItemIndex_ &&
-         x.currentPageIndex_ == other.currentPageIndex_;
-}
-
-void ValueInternalArray::increment(IteratorState& it) {
-  JSON_ASSERT_MESSAGE(
-      it.array_ && (it.currentPageIndex_ - it.array_->pages_) * itemsPerPage +
-                           it.currentItemIndex_ !=
-                       it.array_->size_,
-      "ValueInternalArray::increment(): moving iterator beyond end");
-  ++(it.currentItemIndex_);
-  if (it.currentItemIndex_ == itemsPerPage) {
-    it.currentItemIndex_ = 0;
-    ++(it.currentPageIndex_);
-  }
-}
-
-void ValueInternalArray::decrement(IteratorState& it) {
-  JSON_ASSERT_MESSAGE(
-      it.array_ && it.currentPageIndex_ == it.array_->pages_ &&
-          it.currentItemIndex_ == 0,
-      "ValueInternalArray::decrement(): moving iterator beyond end");
-  if (it.currentItemIndex_ == 0) {
-    it.currentItemIndex_ = itemsPerPage - 1;
-    --(it.currentPageIndex_);
-  } else {
-    --(it.currentItemIndex_);
-  }
-}
-
-Value& ValueInternalArray::unsafeDereference(const IteratorState& it) {
-  return (*(it.currentPageIndex_))[it.currentItemIndex_];
-}
-
-Value& ValueInternalArray::dereference(const IteratorState& it) {
-  JSON_ASSERT_MESSAGE(
-      it.array_ && (it.currentPageIndex_ - it.array_->pages_) * itemsPerPage +
-                           it.currentItemIndex_ <
-                       it.array_->size_,
-      "ValueInternalArray::dereference(): dereferencing invalid iterator");
-  return unsafeDereference(it);
-}
-
-void ValueInternalArray::makeBeginIterator(IteratorState& it) const {
-  it.array_ = const_cast<ValueInternalArray*>(this);
-  it.currentItemIndex_ = 0;
-  it.currentPageIndex_ = pages_;
-}
-
-void ValueInternalArray::makeIterator(IteratorState& it,
-                                      ArrayIndex index) const {
-  it.array_ = const_cast<ValueInternalArray*>(this);
-  it.currentItemIndex_ = index % itemsPerPage;
-  it.currentPageIndex_ = pages_ + index / itemsPerPage;
-}
-
-void ValueInternalArray::makeEndIterator(IteratorState& it) const {
-  makeIterator(it, size_);
-}
-
-ValueInternalArray::ValueInternalArray() : pages_(0), size_(0), pageCount_(0) {}
-
-ValueInternalArray::ValueInternalArray(const ValueInternalArray& other)
-    : pages_(0), size_(other.size_), pageCount_(0) {
-  PageIndex minNewPages = other.size_ / itemsPerPage;
-  arrayAllocator()->reallocateArrayPageIndex(pages_, pageCount_, minNewPages);
-  JSON_ASSERT_MESSAGE(pageCount_ >= minNewPages,
-                      "ValueInternalArray::reserve(): bad reallocation");
-  IteratorState itOther;
-  other.makeBeginIterator(itOther);
-  Value* value;
-  for (ArrayIndex index = 0; index < size_; ++index, increment(itOther)) {
-    if (index % itemsPerPage == 0) {
-      PageIndex pageIndex = index / itemsPerPage;
-      value = arrayAllocator()->allocateArrayPage();
-      pages_[pageIndex] = value;
-    }
-    new (value) Value(dereference(itOther));
-  }
-}
-
-ValueInternalArray& ValueInternalArray::operator=(ValueInternalArray other) {
-  swap(other);
-  return *this;
-}
-
-ValueInternalArray::~ValueInternalArray() {
-  // destroy all constructed items
-  IteratorState it;
-  IteratorState itEnd;
-  makeBeginIterator(it);
-  makeEndIterator(itEnd);
-  for (; !equals(it, itEnd); increment(it)) {
-    Value* value = &dereference(it);
-    value->~Value();
-  }
-  // release all pages
-  PageIndex lastPageIndex = size_ / itemsPerPage;
-  for (PageIndex pageIndex = 0; pageIndex < lastPageIndex; ++pageIndex)
-    arrayAllocator()->releaseArrayPage(pages_[pageIndex]);
-  // release pages index
-  arrayAllocator()->releaseArrayPageIndex(pages_, pageCount_);
-}
-
-void ValueInternalArray::swap(ValueInternalArray& other) {
-  Value** tempPages = pages_;
-  pages_ = other.pages_;
-  other.pages_ = tempPages;
-  ArrayIndex tempSize = size_;
-  size_ = other.size_;
-  other.size_ = tempSize;
-  PageIndex tempPageCount = pageCount_;
-  pageCount_ = other.pageCount_;
-  other.pageCount_ = tempPageCount;
-}
-
-void ValueInternalArray::clear() {
-  ValueInternalArray dummy;
-  swap(dummy);
-}
-
-void ValueInternalArray::resize(ArrayIndex newSize) {
-  if (newSize == 0)
-    clear();
-  else if (newSize < size_) {
-    IteratorState it;
-    IteratorState itEnd;
-    makeIterator(it, newSize);
-    makeIterator(itEnd, size_);
-    for (; !equals(it, itEnd); increment(it)) {
-      Value* value = &dereference(it);
-      value->~Value();
-    }
-    PageIndex pageIndex = (newSize + itemsPerPage - 1) / itemsPerPage;
-    PageIndex lastPageIndex = size_ / itemsPerPage;
-    for (; pageIndex < lastPageIndex; ++pageIndex)
-      arrayAllocator()->releaseArrayPage(pages_[pageIndex]);
-    size_ = newSize;
-  } else if (newSize > size_)
-    resolveReference(newSize);
-}
-
-void ValueInternalArray::makeIndexValid(ArrayIndex index) {
-  // Need to enlarge page index ?
-  if (index >= pageCount_ * itemsPerPage) {
-    PageIndex minNewPages = (index + 1) / itemsPerPage;
-    arrayAllocator()->reallocateArrayPageIndex(pages_, pageCount_, minNewPages);
-    JSON_ASSERT_MESSAGE(pageCount_ >= minNewPages,
-                        "ValueInternalArray::reserve(): bad reallocation");
-  }
-
-  // Need to allocate new pages ?
-  ArrayIndex nextPageIndex = (size_ % itemsPerPage) != 0
-                                 ? size_ - (size_ % itemsPerPage) + itemsPerPage
-                                 : size_;
-  if (nextPageIndex <= index) {
-    PageIndex pageIndex = nextPageIndex / itemsPerPage;
-    PageIndex pageToAllocate = (index - nextPageIndex) / itemsPerPage + 1;
-    for (; pageToAllocate-- > 0; ++pageIndex)
-      pages_[pageIndex] = arrayAllocator()->allocateArrayPage();
-  }
-
-  // Initialize all new entries
-  IteratorState it;
-  IteratorState itEnd;
-  makeIterator(it, size_);
-  size_ = index + 1;
-  makeIterator(itEnd, size_);
-  for (; !equals(it, itEnd); increment(it)) {
-    Value* value = &dereference(it);
-    new (value) Value(); // Construct a default value using placement new
-  }
-}
-
-Value& ValueInternalArray::resolveReference(ArrayIndex index) {
-  if (index >= size_)
-    makeIndexValid(index);
-  return pages_[index / itemsPerPage][index % itemsPerPage];
-}
-
-Value* ValueInternalArray::find(ArrayIndex index) const {
-  if (index >= size_)
-    return 0;
-  return &(pages_[index / itemsPerPage][index % itemsPerPage]);
-}
-
-ValueInternalArray::ArrayIndex ValueInternalArray::size() const {
-  return size_;
-}
-
-int ValueInternalArray::distance(const IteratorState& x,
-                                 const IteratorState& y) {
-  return indexOf(y) - indexOf(x);
-}
-
-ValueInternalArray::ArrayIndex
-ValueInternalArray::indexOf(const IteratorState& iterator) {
-  if (!iterator.array_)
-    return ArrayIndex(-1);
-  return ArrayIndex((iterator.currentPageIndex_ - iterator.array_->pages_) *
-                        itemsPerPage +
-                    iterator.currentItemIndex_);
-}
-
-int ValueInternalArray::compare(const ValueInternalArray& other) const {
-  int sizeDiff(size_ - other.size_);
-  if (sizeDiff != 0)
-    return sizeDiff;
-
-  for (ArrayIndex index = 0; index < size_; ++index) {
-    int diff = pages_[index / itemsPerPage][index % itemsPerPage].compare(
-        other.pages_[index / itemsPerPage][index % itemsPerPage]);
-    if (diff != 0)
-      return diff;
-  }
-  return 0;
-}
-
-} // namespace Json
diff --git a/src/lib_json/json_internalmap.inl b/src/lib_json/json_internalmap.inl
deleted file mode 100644
index ef3f330..0000000
--- a/src/lib_json/json_internalmap.inl
+++ /dev/null
@@ -1,473 +0,0 @@
-// Copyright 2007-2010 Baptiste Lepilleur
-// Distributed under MIT license, or public domain if desired and
-// recognized in your jurisdiction.
-// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
-
-// included by json_value.cpp
-
-namespace Json {
-
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// class ValueInternalMap
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-
-/** \internal MUST be safely initialized using memset( this, 0,
- * sizeof(ValueInternalLink) );
-   * This optimization is used by the fast allocator.
-   */
-ValueInternalLink::ValueInternalLink() : previous_(0), next_(0) {}
-
-ValueInternalLink::~ValueInternalLink() {
-  for (int index = 0; index < itemPerLink; ++index) {
-    if (!items_[index].isItemAvailable()) {
-      if (!items_[index].isMemberNameStatic())
-        free(keys_[index]);
-    } else
-      break;
-  }
-}
-
-ValueMapAllocator::~ValueMapAllocator() {}
-
-#ifdef JSON_USE_SIMPLE_INTERNAL_ALLOCATOR
-class DefaultValueMapAllocator : public ValueMapAllocator {
-public: // overridden from ValueMapAllocator
-  virtual ValueInternalMap* newMap() { return new ValueInternalMap(); }
-
-  virtual ValueInternalMap* newMapCopy(const ValueInternalMap& other) {
-    return new ValueInternalMap(other);
-  }
-
-  virtual void destructMap(ValueInternalMap* map) { delete map; }
-
-  virtual ValueInternalLink* allocateMapBuckets(unsigned int size) {
-    return new ValueInternalLink[size];
-  }
-
-  virtual void releaseMapBuckets(ValueInternalLink* links) { delete[] links; }
-
-  virtual ValueInternalLink* allocateMapLink() {
-    return new ValueInternalLink();
-  }
-
-  virtual void releaseMapLink(ValueInternalLink* link) { delete link; }
-};
-#else
-/// @todo make this thread-safe (lock when accessign batch allocator)
-class DefaultValueMapAllocator : public ValueMapAllocator {
-public: // overridden from ValueMapAllocator
-  virtual ValueInternalMap* newMap() {
-    ValueInternalMap* map = mapsAllocator_.allocate();
-    new (map) ValueInternalMap(); // placement new
-    return map;
-  }
-
-  virtual ValueInternalMap* newMapCopy(const ValueInternalMap& other) {
-    ValueInternalMap* map = mapsAllocator_.allocate();
-    new (map) ValueInternalMap(other); // placement new
-    return map;
-  }
-
-  virtual void destructMap(ValueInternalMap* map) {
-    if (map) {
-      map->~ValueInternalMap();
-      mapsAllocator_.release(map);
-    }
-  }
-
-  virtual ValueInternalLink* allocateMapBuckets(unsigned int size) {
-    return new ValueInternalLink[size];
-  }
-
-  virtual void releaseMapBuckets(ValueInternalLink* links) { delete[] links; }
-
-  virtual ValueInternalLink* allocateMapLink() {
-    ValueInternalLink* link = linksAllocator_.allocate();
-    memset(link, 0, sizeof(ValueInternalLink));
-    return link;
-  }
-
-  virtual void releaseMapLink(ValueInternalLink* link) {
-    link->~ValueInternalLink();
-    linksAllocator_.release(link);
-  }
-
-private:
-  BatchAllocator<ValueInternalMap, 1> mapsAllocator_;
-  BatchAllocator<ValueInternalLink, 1> linksAllocator_;
-};
-#endif
-
-static ValueMapAllocator*& mapAllocator() {
-  static DefaultValueMapAllocator defaultAllocator;
-  static ValueMapAllocator* mapAllocator = &defaultAllocator;
-  return mapAllocator;
-}
-
-static struct DummyMapAllocatorInitializer {
-  DummyMapAllocatorInitializer() {
-    mapAllocator(); // ensure mapAllocator() statics are initialized before
-                    // main().
-  }
-} dummyMapAllocatorInitializer;
-
-// h(K) = value * K >> w ; with w = 32 & K prime w.r.t. 2^32.
-
-/*
-use linked list hash map.
-buckets array is a container.
-linked list element contains 6 key/values. (memory = (16+4) * 6 + 4 = 124)
-value have extra state: valid, available, deleted
-*/
-
-ValueInternalMap::ValueInternalMap()
-    : buckets_(0), tailLink_(0), bucketsSize_(0), itemCount_(0) {}
-
-ValueInternalMap::ValueInternalMap(const ValueInternalMap& other)
-    : buckets_(0), tailLink_(0), bucketsSize_(0), itemCount_(0) {
-  reserve(other.itemCount_);
-  IteratorState it;
-  IteratorState itEnd;
-  other.makeBeginIterator(it);
-  other.makeEndIterator(itEnd);
-  for (; !equals(it, itEnd); increment(it)) {
-    bool isStatic;
-    const char* memberName = key(it, isStatic);
-    const Value& aValue = value(it);
-    resolveReference(memberName, isStatic) = aValue;
-  }
-}
-
-ValueInternalMap& ValueInternalMap::operator=(ValueInternalMap other) {
-  swap(other);
-  return *this;
-}
-
-ValueInternalMap::~ValueInternalMap() {
-  if (buckets_) {
-    for (BucketIndex bucketIndex = 0; bucketIndex < bucketsSize_;
-         ++bucketIndex) {
-      ValueInternalLink* link = buckets_[bucketIndex].next_;
-      while (link) {
-        ValueInternalLink* linkToRelease = link;
-        link = link->next_;
-        mapAllocator()->releaseMapLink(linkToRelease);
-      }
-    }
-    mapAllocator()->releaseMapBuckets(buckets_);
-  }
-}
-
-void ValueInternalMap::swap(ValueInternalMap& other) {
-  ValueInternalLink* tempBuckets = buckets_;
-  buckets_ = other.buckets_;
-  other.buckets_ = tempBuckets;
-  ValueInternalLink* tempTailLink = tailLink_;
-  tailLink_ = other.tailLink_;
-  other.tailLink_ = tempTailLink;
-  BucketIndex tempBucketsSize = bucketsSize_;
-  bucketsSize_ = other.bucketsSize_;
-  other.bucketsSize_ = tempBucketsSize;
-  BucketIndex tempItemCount = itemCount_;
-  itemCount_ = other.itemCount_;
-  other.itemCount_ = tempItemCount;
-}
-
-void ValueInternalMap::clear() {
-  ValueInternalMap dummy;
-  swap(dummy);
-}
-
-ValueInternalMap::BucketIndex ValueInternalMap::size() const {
-  return itemCount_;
-}
-
-bool ValueInternalMap::reserveDelta(BucketIndex growth) {
-  return reserve(itemCount_ + growth);
-}
-
-bool ValueInternalMap::reserve(BucketIndex newItemCount) {
-  if (!buckets_ && newItemCount > 0) {
-    buckets_ = mapAllocator()->allocateMapBuckets(1);
-    bucketsSize_ = 1;
-    tailLink_ = &buckets_[0];
-  }
-  //   BucketIndex idealBucketCount = (newItemCount +
-  // ValueInternalLink::itemPerLink) / ValueInternalLink::itemPerLink;
-  return true;
-}
-
-const Value* ValueInternalMap::find(const char* key) const {
-  if (!bucketsSize_)
-    return 0;
-  HashKey hashedKey = hash(key);
-  BucketIndex bucketIndex = hashedKey % bucketsSize_;
-  for (const ValueInternalLink* current = &buckets_[bucketIndex]; current != 0;
-       current = current->next_) {
-    for (BucketIndex index = 0; index < ValueInternalLink::itemPerLink;
-         ++index) {
-      if (current->items_[index].isItemAvailable())
-        return 0;
-      if (strcmp(key, current->keys_[index]) == 0)
-        return &current->items_[index];
-    }
-  }
-  return 0;
-}
-
-Value* ValueInternalMap::find(const char* key) {
-  const ValueInternalMap* constThis = this;
-  return const_cast<Value*>(constThis->find(key));
-}
-
-Value& ValueInternalMap::resolveReference(const char* key, bool isStatic) {
-  HashKey hashedKey = hash(key);
-  if (bucketsSize_) {
-    BucketIndex bucketIndex = hashedKey % bucketsSize_;
-    ValueInternalLink** previous = 0;
-    BucketIndex index;
-    for (ValueInternalLink* current = &buckets_[bucketIndex]; current != 0;
-         previous = &current->next_, current = current->next_) {
-      for (index = 0; index < ValueInternalLink::itemPerLink; ++index) {
-        if (current->items_[index].isItemAvailable())
-          return setNewItem(key, isStatic, current, index);
-        if (strcmp(key, current->keys_[index]) == 0)
-          return current->items_[index];
-      }
-    }
-  }
-
-  reserveDelta(1);
-  return unsafeAdd(key, isStatic, hashedKey);
-}
-
-void ValueInternalMap::remove(const char* key) {
-  HashKey hashedKey = hash(key);
-  if (!bucketsSize_)
-    return;
-  BucketIndex bucketIndex = hashedKey % bucketsSize_;
-  for (ValueInternalLink* link = &buckets_[bucketIndex]; link != 0;
-       link = link->next_) {
-    BucketIndex index;
-    for (index = 0; index < ValueInternalLink::itemPerLink; ++index) {
-      if (link->items_[index].isItemAvailable())
-        return;
-      if (strcmp(key, link->keys_[index]) == 0) {
-        doActualRemove(link, index, bucketIndex);
-        return;
-      }
-    }
-  }
-}
-
-void ValueInternalMap::doActualRemove(ValueInternalLink* link,
-                                      BucketIndex index,
-                                      BucketIndex bucketIndex) {
-  // find last item of the bucket and swap it with the 'removed' one.
-  // set removed items flags to 'available'.
-  // if last page only contains 'available' items, then desallocate it (it's
-  // empty)
-  ValueInternalLink*& lastLink = getLastLinkInBucket(index);
-  BucketIndex lastItemIndex = 1; // a link can never be empty, so start at 1
-  for (; lastItemIndex < ValueInternalLink::itemPerLink;
-       ++lastItemIndex) // may be optimized with dicotomic search
-  {
-    if (lastLink->items_[lastItemIndex].isItemAvailable())
-      break;
-  }
-
-  BucketIndex lastUsedIndex = lastItemIndex - 1;
-  Value* valueToDelete = &link->items_[index];
-  Value* valueToPreserve = &lastLink->items_[lastUsedIndex];
-  if (valueToDelete != valueToPreserve)
-    valueToDelete->swap(*valueToPreserve);
-  if (lastUsedIndex == 0) // page is now empty
-  {                       // remove it from bucket linked list and delete it.
-    ValueInternalLink* linkPreviousToLast = lastLink->previous_;
-    if (linkPreviousToLast != 0) // can not deleted bucket link.
-    {
-      mapAllocator()->releaseMapLink(lastLink);
-      linkPreviousToLast->next_ = 0;
-      lastLink = linkPreviousToLast;
-    }
-  } else {
-    Value dummy;
-    valueToPreserve->swap(dummy); // restore deleted to default Value.
-    valueToPreserve->setItemUsed(false);
-  }
-  --itemCount_;
-}
-
-ValueInternalLink*&
-ValueInternalMap::getLastLinkInBucket(BucketIndex bucketIndex) {
-  if (bucketIndex == bucketsSize_ - 1)
-    return tailLink_;
-  ValueInternalLink*& previous = buckets_[bucketIndex + 1].previous_;
-  if (!previous)
-    previous = &buckets_[bucketIndex];
-  return previous;
-}
-
-Value& ValueInternalMap::setNewItem(const char* key,
-                                    bool isStatic,
-                                    ValueInternalLink* link,
-                                    BucketIndex index) {
-  char* duplicatedKey = makeMemberName(key);
-  ++itemCount_;
-  link->keys_[index] = duplicatedKey;
-  link->items_[index].setItemUsed();
-  link->items_[index].setMemberNameIsStatic(isStatic);
-  return link->items_[index]; // items already default constructed.
-}
-
-Value&
-ValueInternalMap::unsafeAdd(const char* key, bool isStatic, HashKey hashedKey) {
-  JSON_ASSERT_MESSAGE(bucketsSize_ > 0,
-                      "ValueInternalMap::unsafeAdd(): internal logic error.");
-  BucketIndex bucketIndex = hashedKey % bucketsSize_;
-  ValueInternalLink*& previousLink = getLastLinkInBucket(bucketIndex);
-  ValueInternalLink* link = previousLink;
-  BucketIndex index;
-  for (index = 0; index < ValueInternalLink::itemPerLink; ++index) {
-    if (link->items_[index].isItemAvailable())
-      break;
-  }
-  if (index == ValueInternalLink::itemPerLink) // need to add a new page
-  {
-    ValueInternalLink* newLink = mapAllocator()->allocateMapLink();
-    index = 0;
-    link->next_ = newLink;
-    previousLink = newLink;
-    link = newLink;
-  }
-  return setNewItem(key, isStatic, link, index);
-}
-
-ValueInternalMap::HashKey ValueInternalMap::hash(const char* key) const {
-  HashKey hash = 0;
-  while (*key)
-    hash += *key++ * 37;
-  return hash;
-}
-
-int ValueInternalMap::compare(const ValueInternalMap& other) const {
-  int sizeDiff(itemCount_ - other.itemCount_);
-  if (sizeDiff != 0)
-    return sizeDiff;
-  // Strict order guaranty is required. Compare all keys FIRST, then compare
-  // values.
-  IteratorState it;
-  IteratorState itEnd;
-  makeBeginIterator(it);
-  makeEndIterator(itEnd);
-  for (; !equals(it, itEnd); increment(it)) {
-    if (!other.find(key(it)))
-      return 1;
-  }
-
-  // All keys are equals, let's compare values
-  makeBeginIterator(it);
-  for (; !equals(it, itEnd); increment(it)) {
-    const Value* otherValue = other.find(key(it));
-    int valueDiff = value(it).compare(*otherValue);
-    if (valueDiff != 0)
-      return valueDiff;
-  }
-  return 0;
-}
-
-void ValueInternalMap::makeBeginIterator(IteratorState& it) const {
-  it.map_ = const_cast<ValueInternalMap*>(this);
-  it.bucketIndex_ = 0;
-  it.itemIndex_ = 0;
-  it.link_ = buckets_;
-}
-
-void ValueInternalMap::makeEndIterator(IteratorState& it) const {
-  it.map_ = const_cast<ValueInternalMap*>(this);
-  it.bucketIndex_ = bucketsSize_;
-  it.itemIndex_ = 0;
-  it.link_ = 0;
-}
-
-bool ValueInternalMap::equals(const IteratorState& x,
-                              const IteratorState& other) {
-  return x.map_ == other.map_ && x.bucketIndex_ == other.bucketIndex_ &&
-         x.link_ == other.link_ && x.itemIndex_ == other.itemIndex_;
-}
-
-void ValueInternalMap::incrementBucket(IteratorState& iterator) {
-  ++iterator.bucketIndex_;
-  JSON_ASSERT_MESSAGE(
-      iterator.bucketIndex_ <= iterator.map_->bucketsSize_,
-      "ValueInternalMap::increment(): attempting to iterate beyond end.");
-  if (iterator.bucketIndex_ == iterator.map_->bucketsSize_)
-    iterator.link_ = 0;
-  else
-    iterator.link_ = &(iterator.map_->buckets_[iterator.bucketIndex_]);
-  iterator.itemIndex_ = 0;
-}
-
-void ValueInternalMap::increment(IteratorState& iterator) {
-  JSON_ASSERT_MESSAGE(iterator.map_,
-                      "Attempting to iterator using invalid iterator.");
-  ++iterator.itemIndex_;
-  if (iterator.itemIndex_ == ValueInternalLink::itemPerLink) {
-    JSON_ASSERT_MESSAGE(
-        iterator.link_ != 0,
-        "ValueInternalMap::increment(): attempting to iterate beyond end.");
-    iterator.link_ = iterator.link_->next_;
-    if (iterator.link_ == 0)
-      incrementBucket(iterator);
-  } else if (iterator.link_->items_[iterator.itemIndex_].isItemAvailable()) {
-    incrementBucket(iterator);
-  }
-}
-
-void ValueInternalMap::decrement(IteratorState& iterator) {
-  if (iterator.itemIndex_ == 0) {
-    JSON_ASSERT_MESSAGE(iterator.map_,
-                        "Attempting to iterate using invalid iterator.");
-    if (iterator.link_ == &iterator.map_->buckets_[iterator.bucketIndex_]) {
-      JSON_ASSERT_MESSAGE(iterator.bucketIndex_ > 0,
-                          "Attempting to iterate beyond beginning.");
-      --(iterator.bucketIndex_);
-    }
-    iterator.link_ = iterator.link_->previous_;
-    iterator.itemIndex_ = ValueInternalLink::itemPerLink - 1;
-  }
-}
-
-const char* ValueInternalMap::key(const IteratorState& iterator) {
-  JSON_ASSERT_MESSAGE(iterator.link_,
-                      "Attempting to iterate using invalid iterator.");
-  return iterator.link_->keys_[iterator.itemIndex_];
-}
-
-const char* ValueInternalMap::key(const IteratorState& iterator,
-                                  bool& isStatic) {
-  JSON_ASSERT_MESSAGE(iterator.link_,
-                      "Attempting to iterate using invalid iterator.");
-  isStatic = iterator.link_->items_[iterator.itemIndex_].isMemberNameStatic();
-  return iterator.link_->keys_[iterator.itemIndex_];
-}
-
-Value& ValueInternalMap::value(const IteratorState& iterator) {
-  JSON_ASSERT_MESSAGE(iterator.link_,
-                      "Attempting to iterate using invalid iterator.");
-  return iterator.link_->items_[iterator.itemIndex_];
-}
-
-int ValueInternalMap::distance(const IteratorState& x, const IteratorState& y) {
-  int offset = 0;
-  IteratorState it = x;
-  while (!equals(it, y))
-    increment(it);
-  return offset;
-}
-
-} // namespace Json
diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index 6136230..19922a8 100644
--- a/src/lib_json/json_reader.cpp
+++ b/src/lib_json/json_reader.cpp
@@ -1,41 +1,69 @@
-// Copyright 2007-2011 Baptiste Lepilleur
+// Copyright 2007-2011 Baptiste Lepilleur and The JsonCpp Authors
+// Copyright (C) 2016 InfoTeCS JSC. All rights reserved.
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
 #if !defined(JSON_IS_AMALGAMATION)
+#include "json_tool.h"
 #include <json/assertions.h>
 #include <json/reader.h>
 #include <json/value.h>
-#include "json_tool.h"
 #endif // if !defined(JSON_IS_AMALGAMATION)
-#include <iostream>
-#include <fstream>
-#include <utility>
-#include <cstdio>
+#include <algorithm>
 #include <cassert>
 #include <cstring>
+#include <iostream>
 #include <istream>
+#include <limits>
+#include <memory>
+#include <set>
+#include <sstream>
+#include <utility>
 
-#if defined(_MSC_VER) && _MSC_VER < 1500 // VC++ 8.0 and below
-#define snprintf _snprintf
+#include <cstdio>
+#if __cplusplus >= 201103L
+
+#if !defined(sscanf)
+#define sscanf std::sscanf
 #endif
 
-#if defined(_MSC_VER) && _MSC_VER >= 1400 // VC++ 8.0
+#endif //__cplusplus
+
+#if defined(_MSC_VER)
+#if !defined(_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES)
+#define _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES 1
+#endif //_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES
+#endif //_MSC_VER
+
+#if defined(_MSC_VER)
 // Disable warning about strdup being deprecated.
 #pragma warning(disable : 4996)
 #endif
 
+// Define JSONCPP_DEPRECATED_STACK_LIMIT as an appropriate integer at compile
+// time to change the stack limit
+#if !defined(JSONCPP_DEPRECATED_STACK_LIMIT)
+#define JSONCPP_DEPRECATED_STACK_LIMIT 1000
+#endif
+
+static size_t const stackLimit_g =
+    JSONCPP_DEPRECATED_STACK_LIMIT; // see readValue()
+
 namespace Json {
 
+#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520)
+using CharReaderPtr = std::unique_ptr<CharReader>;
+#else
+using CharReaderPtr = std::auto_ptr<CharReader>;
+#endif
+
 // Implementation of class Features
 // ////////////////////////////////
 
-Features::Features()
-    : allowComments_(true), strictRoot_(false),
-      allowDroppedNullPlaceholders_(false), allowNumericKeys_(false) {}
+Features::Features() = default;
 
-Features Features::all() { return Features(); }
+Features Features::all() { return {}; }
 
 Features Features::strictMode() {
   Features features;
@@ -49,67 +77,39 @@
 // Implementation of class Reader
 // ////////////////////////////////
 
-static inline bool in(Reader::Char c,
-                      Reader::Char c1,
-                      Reader::Char c2,
-                      Reader::Char c3,
-                      Reader::Char c4) {
-  return c == c1 || c == c2 || c == c3 || c == c4;
-}
-
-static inline bool in(Reader::Char c,
-                      Reader::Char c1,
-                      Reader::Char c2,
-                      Reader::Char c3,
-                      Reader::Char c4,
-                      Reader::Char c5) {
-  return c == c1 || c == c2 || c == c3 || c == c4 || c == c5;
-}
-
-static bool containsNewLine(Reader::Location begin, Reader::Location end) {
-  for (; begin < end; ++begin)
-    if (*begin == '\n' || *begin == '\r')
-      return true;
-  return false;
+bool Reader::containsNewLine(Reader::Location begin, Reader::Location end) {
+  return std::any_of(begin, end, [](char b) { return b == '\n' || b == '\r'; });
 }
 
 // Class Reader
 // //////////////////////////////////////////////////////////////////
 
-Reader::Reader()
-    : errors_(), document_(), begin_(), end_(), current_(), lastValueEnd_(),
-      lastValue_(), commentsBefore_(), features_(Features::all()),
-      collectComments_() {}
+Reader::Reader() : features_(Features::all()) {}
 
-Reader::Reader(const Features& features)
-    : errors_(), document_(), begin_(), end_(), current_(), lastValueEnd_(),
-      lastValue_(), commentsBefore_(), features_(features), collectComments_() {
-}
+Reader::Reader(const Features& features) : features_(features) {}
 
-bool
-Reader::parse(const std::string& document, Value& root, bool collectComments) {
-  document_ = document;
+bool Reader::parse(const std::string& document, Value& root,
+                   bool collectComments) {
+  document_.assign(document.begin(), document.end());
   const char* begin = document_.c_str();
   const char* end = begin + document_.length();
   return parse(begin, end, root, collectComments);
 }
 
-bool Reader::parse(std::istream& sin, Value& root, bool collectComments) {
-  // std::istream_iterator<char> begin(sin);
+bool Reader::parse(std::istream& is, Value& root, bool collectComments) {
+  // std::istream_iterator<char> begin(is);
   // std::istream_iterator<char> end;
   // Those would allow streamed input from a file, if parse() were a
   // template function.
 
-  // Since std::string is reference-counted, this at least does not
+  // Since String is reference-counted, this at least does not
   // create an extra copy.
-  std::string doc;
-  std::getline(sin, doc, (char)EOF);
-  return parse(doc, root, collectComments);
+  String doc;
+  std::getline(is, doc, static_cast<char> EOF);
+  return parse(doc.data(), doc.data() + doc.size(), root, collectComments);
 }
 
-bool Reader::parse(const char* beginDoc,
-                   const char* endDoc,
-                   Value& root,
+bool Reader::parse(const char* beginDoc, const char* endDoc, Value& root,
                    bool collectComments) {
   if (!features_.allowComments_) {
     collectComments = false;
@@ -119,9 +119,9 @@
   end_ = endDoc;
   collectComments_ = collectComments;
   current_ = begin_;
-  lastValueEnd_ = 0;
-  lastValue_ = 0;
-  commentsBefore_ = "";
+  lastValueEnd_ = nullptr;
+  lastValue_ = nullptr;
+  commentsBefore_.clear();
   errors_.clear();
   while (!nodes_.empty())
     nodes_.pop();
@@ -149,21 +149,20 @@
 }
 
 bool Reader::readValue() {
+  // readValue() may call itself only if it calls readObject() or ReadArray().
+  // These methods execute nodes_.push() just before and nodes_.pop)() just
+  // after calling readValue(). parse() executes one nodes_.push(), so > instead
+  // of >=.
+  if (nodes_.size() > stackLimit_g)
+    throwRuntimeError("Exceeded stackLimit in readValue().");
+
   Token token;
   skipCommentTokens(token);
   bool successful = true;
 
   if (collectComments_ && !commentsBefore_.empty()) {
-    // Remove newline characters at the end of the comments
-    size_t lastNonNewline = commentsBefore_.find_last_not_of("\r\n");
-    if (lastNonNewline != std::string::npos) {
-      commentsBefore_.erase(lastNonNewline + 1);
-    } else {
-      commentsBefore_.clear();
-    }
-
     currentValue().setComment(commentsBefore_, commentBefore);
-    commentsBefore_ = "";
+    commentsBefore_.clear();
   }
 
   switch (token.type_) {
@@ -181,32 +180,37 @@
   case tokenString:
     successful = decodeString(token);
     break;
-  case tokenTrue:
-    currentValue() = true;
+  case tokenTrue: {
+    Value v(true);
+    currentValue().swapPayload(v);
     currentValue().setOffsetStart(token.start_ - begin_);
     currentValue().setOffsetLimit(token.end_ - begin_);
-    break;
-  case tokenFalse:
-    currentValue() = false;
+  } break;
+  case tokenFalse: {
+    Value v(false);
+    currentValue().swapPayload(v);
     currentValue().setOffsetStart(token.start_ - begin_);
     currentValue().setOffsetLimit(token.end_ - begin_);
-    break;
-  case tokenNull:
-    currentValue() = Value();
+  } break;
+  case tokenNull: {
+    Value v;
+    currentValue().swapPayload(v);
     currentValue().setOffsetStart(token.start_ - begin_);
     currentValue().setOffsetLimit(token.end_ - begin_);
-    break;
+  } break;
   case tokenArraySeparator:
+  case tokenObjectEnd:
+  case tokenArrayEnd:
     if (features_.allowDroppedNullPlaceholders_) {
       // "Un-read" the current token and mark the current value as a null
       // token.
       current_--;
-      currentValue() = Value();
+      Value v;
+      currentValue().swapPayload(v);
       currentValue().setOffsetStart(current_ - begin_ - 1);
       currentValue().setOffsetLimit(current_ - begin_);
       break;
-    }
-  // Else, fall through...
+    } // Else, fall through...
   default:
     currentValue().setOffsetStart(token.start_ - begin_);
     currentValue().setOffsetLimit(token.end_ - begin_);
@@ -231,13 +235,6 @@
   }
 }
 
-bool Reader::expectToken(TokenType type, Token& token, const char* message) {
-  readToken(token);
-  if (token.type_ != type)
-    return addError(message, token);
-  return true;
-}
-
 bool Reader::readToken(Token& token) {
   skipSpaces();
   token.start_ = current_;
@@ -306,7 +303,7 @@
   if (!ok)
     token.type_ = tokenError;
   token.end_ = current_;
-  return true;
+  return ok;
 }
 
 void Reader::skipSpaces() {
@@ -319,7 +316,7 @@
   }
 }
 
-bool Reader::match(Location pattern, int patternLength) {
+bool Reader::match(const Char* pattern, int patternLength) {
   if (end_ - current_ < patternLength)
     return false;
   int index = patternLength;
@@ -353,19 +350,39 @@
   return true;
 }
 
-void
-Reader::addComment(Location begin, Location end, CommentPlacement placement) {
+String Reader::normalizeEOL(Reader::Location begin, Reader::Location end) {
+  String normalized;
+  normalized.reserve(static_cast<size_t>(end - begin));
+  Reader::Location current = begin;
+  while (current != end) {
+    char c = *current++;
+    if (c == '\r') {
+      if (current != end && *current == '\n')
+        // convert dos EOL
+        ++current;
+      // convert Mac EOL
+      normalized += '\n';
+    } else {
+      normalized += c;
+    }
+  }
+  return normalized;
+}
+
+void Reader::addComment(Location begin, Location end,
+                        CommentPlacement placement) {
   assert(collectComments_);
+  const String& normalized = normalizeEOL(begin, end);
   if (placement == commentAfterOnSameLine) {
-    assert(lastValue_ != 0);
-    lastValue_->setComment(std::string(begin, end), placement);
+    assert(lastValue_ != nullptr);
+    lastValue_->setComment(normalized, placement);
   } else {
-    commentsBefore_ += std::string(begin, end);
+    commentsBefore_ += normalized;
   }
 }
 
 bool Reader::readCStyleComment() {
-  while (current_ != end_) {
+  while ((current_ + 1) < end_) {
     Char c = getNextChar();
     if (c == '*' && *current_ == '/')
       break;
@@ -376,23 +393,43 @@
 bool Reader::readCppStyleComment() {
   while (current_ != end_) {
     Char c = getNextChar();
-    if (c == '\r' || c == '\n')
+    if (c == '\n')
       break;
+    if (c == '\r') {
+      // Consume DOS EOL. It will be normalized in addComment.
+      if (current_ != end_ && *current_ == '\n')
+        getNextChar();
+      // Break on Moc OS 9 EOL.
+      break;
+    }
   }
   return true;
 }
 
 void Reader::readNumber() {
-  while (current_ != end_) {
-    if (!(*current_ >= '0' && *current_ <= '9') &&
-        !in(*current_, '.', 'e', 'E', '+', '-'))
-      break;
-    ++current_;
+  Location p = current_;
+  char c = '0'; // stopgap for already consumed character
+  // integral part
+  while (c >= '0' && c <= '9')
+    c = (current_ = p) < end_ ? *p++ : '\0';
+  // fractional part
+  if (c == '.') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+  }
+  // exponential part
+  if (c == 'e' || c == 'E') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    if (c == '+' || c == '-')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
   }
 }
 
 bool Reader::readString() {
-  Char c = 0;
+  Char c = '\0';
   while (current_ != end_) {
     c = getNextChar();
     if (c == '\\')
@@ -403,11 +440,12 @@
   return c == '"';
 }
 
-bool Reader::readObject(Token& tokenStart) {
+bool Reader::readObject(Token& token) {
   Token tokenName;
-  std::string name;
-  currentValue() = Value(objectValue);
-  currentValue().setOffsetStart(tokenStart.start_ - begin_);
+  String name;
+  Value init(objectValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
   while (readToken(tokenName)) {
     bool initialTokenOk = true;
     while (tokenName.type_ == tokenComment && initialTokenOk)
@@ -416,7 +454,7 @@
       break;
     if (tokenName.type_ == tokenObjectEnd && name.empty()) // empty object
       return true;
-    name = "";
+    name.clear();
     if (tokenName.type_ == tokenString) {
       if (!decodeString(tokenName, name))
         return recoverFromError(tokenObjectEnd);
@@ -431,8 +469,8 @@
 
     Token colon;
     if (!readToken(colon) || colon.type_ != tokenMemberSeparator) {
-      return addErrorAndRecover(
-          "Missing ':' after object member name", colon, tokenObjectEnd);
+      return addErrorAndRecover("Missing ':' after object member name", colon,
+                                tokenObjectEnd);
     }
     Value& value = currentValue()[name];
     nodes_.push(&value);
@@ -445,8 +483,8 @@
     if (!readToken(comma) ||
         (comma.type_ != tokenObjectEnd && comma.type_ != tokenArraySeparator &&
          comma.type_ != tokenComment)) {
-      return addErrorAndRecover(
-          "Missing ',' or '}' in object declaration", comma, tokenObjectEnd);
+      return addErrorAndRecover("Missing ',' or '}' in object declaration",
+                                comma, tokenObjectEnd);
     }
     bool finalizeTokenOk = true;
     while (comma.type_ == tokenComment && finalizeTokenOk)
@@ -454,15 +492,16 @@
     if (comma.type_ == tokenObjectEnd)
       return true;
   }
-  return addErrorAndRecover(
-      "Missing '}' or object member name", tokenName, tokenObjectEnd);
+  return addErrorAndRecover("Missing '}' or object member name", tokenName,
+                            tokenObjectEnd);
 }
 
-bool Reader::readArray(Token& tokenStart) {
-  currentValue() = Value(arrayValue);
-  currentValue().setOffsetStart(tokenStart.start_ - begin_);
+bool Reader::readArray(Token& token) {
+  Value init(arrayValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
   skipSpaces();
-  if (*current_ == ']') // empty array
+  if (current_ != end_ && *current_ == ']') // empty array
   {
     Token endArray;
     readToken(endArray);
@@ -477,19 +516,19 @@
     if (!ok) // error already set
       return recoverFromError(tokenArrayEnd);
 
-    Token token;
+    Token currentToken;
     // Accept Comment after last item in the array.
-    ok = readToken(token);
-    while (token.type_ == tokenComment && ok) {
-      ok = readToken(token);
+    ok = readToken(currentToken);
+    while (currentToken.type_ == tokenComment && ok) {
+      ok = readToken(currentToken);
     }
-    bool badTokenType =
-        (token.type_ != tokenArraySeparator && token.type_ != tokenArrayEnd);
+    bool badTokenType = (currentToken.type_ != tokenArraySeparator &&
+                         currentToken.type_ != tokenArrayEnd);
     if (!ok || badTokenType) {
-      return addErrorAndRecover(
-          "Missing ',' or ']' in array declaration", token, tokenArrayEnd);
+      return addErrorAndRecover("Missing ',' or ']' in array declaration",
+                                currentToken, tokenArrayEnd);
     }
-    if (token.type_ == tokenArrayEnd)
+    if (currentToken.type_ == tokenArrayEnd)
       break;
   }
   return true;
@@ -499,20 +538,13 @@
   Value decoded;
   if (!decodeNumber(token, decoded))
     return false;
-  currentValue() = decoded;
+  currentValue().swapPayload(decoded);
   currentValue().setOffsetStart(token.start_ - begin_);
   currentValue().setOffsetLimit(token.end_ - begin_);
   return true;
 }
 
 bool Reader::decodeNumber(Token& token, Value& decoded) {
-  bool isDouble = false;
-  for (Location inspect = token.start_; inspect != token.end_; ++inspect) {
-    isDouble = isDouble || in(*inspect, '.', 'e', 'E', '+') ||
-               (*inspect == '-' && inspect != token.start_);
-  }
-  if (isDouble)
-    return decodeDouble(token, decoded);
   // Attempts to parse the number as an integer. If the number is
   // larger than the maximum supported value of an integer then
   // we decode the number as a double.
@@ -520,18 +552,18 @@
   bool isNegative = *current == '-';
   if (isNegative)
     ++current;
+  // TODO: Help the compiler do the div and mod at compile time or get rid of
+  // them.
   Value::LargestUInt maxIntegerValue =
-      isNegative ? Value::LargestUInt(-Value::minLargestInt)
+      isNegative ? Value::LargestUInt(Value::maxLargestInt) + 1
                  : Value::maxLargestUInt;
   Value::LargestUInt threshold = maxIntegerValue / 10;
   Value::LargestUInt value = 0;
   while (current < token.end_) {
     Char c = *current++;
     if (c < '0' || c > '9')
-      return addError("'" + std::string(token.start_, token.end_) +
-                          "' is not a number.",
-                      token);
-    Value::UInt digit(c - '0');
+      return decodeDouble(token, decoded);
+    auto digit(static_cast<Value::UInt>(c - '0'));
     if (value >= threshold) {
       // We've hit or exceeded the max value divided by 10 (rounded down). If
       // a) we've only just touched the limit, b) this is the last digit, and
@@ -544,7 +576,9 @@
     }
     value = value * 10 + digit;
   }
-  if (isNegative)
+  if (isNegative && value == maxIntegerValue)
+    decoded = Value::minLargestInt;
+  else if (isNegative)
     decoded = -Value::LargestInt(value);
   else if (value <= Value::LargestUInt(Value::maxInt))
     decoded = Value::LargestInt(value);
@@ -557,7 +591,7 @@
   Value decoded;
   if (!decodeDouble(token, decoded))
     return false;
-  currentValue() = decoded;
+  currentValue().swapPayload(decoded);
   currentValue().setOffsetStart(token.start_ - begin_);
   currentValue().setOffsetLimit(token.end_ - begin_);
   return true;
@@ -565,59 +599,35 @@
 
 bool Reader::decodeDouble(Token& token, Value& decoded) {
   double value = 0;
-  const int bufferSize = 32;
-  int count;
-  int length = int(token.end_ - token.start_);
-
-  // Sanity check to avoid buffer overflow exploits.
-  if (length < 0) {
-    return addError("Unable to parse token length", token);
-  }
-
-  // Avoid using a string constant for the format control string given to
-  // sscanf, as this can cause hard to debug crashes on OS X. See here for more
-  // info:
-  //
-  //     http://developer.apple.com/library/mac/#DOCUMENTATION/DeveloperTools/gcc-4.0.1/gcc/Incompatibilities.html
-  char format[] = "%lf";
-
-  if (length <= bufferSize) {
-    Char buffer[bufferSize + 1];
-    memcpy(buffer, token.start_, length);
-    buffer[length] = 0;
-    count = sscanf(buffer, format, &value);
-  } else {
-    std::string buffer(token.start_, token.end_);
-    count = sscanf(buffer.c_str(), format, &value);
-  }
-
-  if (count != 1)
-    return addError("'" + std::string(token.start_, token.end_) +
-                        "' is not a number.",
-                    token);
+  String buffer(token.start_, token.end_);
+  IStringStream is(buffer);
+  if (!(is >> value))
+    return addError(
+        "'" + String(token.start_, token.end_) + "' is not a number.", token);
   decoded = value;
   return true;
 }
 
 bool Reader::decodeString(Token& token) {
-  std::string decoded;
-  if (!decodeString(token, decoded))
+  String decoded_string;
+  if (!decodeString(token, decoded_string))
     return false;
-  currentValue() = decoded;
+  Value decoded(decoded_string);
+  currentValue().swapPayload(decoded);
   currentValue().setOffsetStart(token.start_ - begin_);
   currentValue().setOffsetLimit(token.end_ - begin_);
   return true;
 }
 
-bool Reader::decodeString(Token& token, std::string& decoded) {
-  decoded.reserve(token.end_ - token.start_ - 2);
+bool Reader::decodeString(Token& token, String& decoded) {
+  decoded.reserve(static_cast<size_t>(token.end_ - token.start_ - 2));
   Location current = token.start_ + 1; // skip '"'
   Location end = token.end_ - 1;       // do not include '"'
   while (current != end) {
     Char c = *current++;
     if (c == '"')
       break;
-    else if (c == '\\') {
+    if (c == '\\') {
       if (current == end)
         return addError("Empty escape sequence in string", token, current);
       Char escape = *current++;
@@ -662,10 +672,8 @@
   return true;
 }
 
-bool Reader::decodeUnicodeCodePoint(Token& token,
-                                    Location& current,
-                                    Location end,
-                                    unsigned int& unicode) {
+bool Reader::decodeUnicodeCodePoint(Token& token, Location& current,
+                                    Location end, unsigned int& unicode) {
 
   if (!decodeUnicodeEscapeSequence(token, current, end, unicode))
     return false;
@@ -674,10 +682,9 @@
     if (end - current < 6)
       return addError(
           "additional six characters expected to parse unicode surrogate pair.",
-          token,
-          current);
-    unsigned int surrogatePair;
+          token, current);
     if (*(current++) == '\\' && *(current++) == 'u') {
+      unsigned int surrogatePair;
       if (decodeUnicodeEscapeSequence(token, current, end, surrogatePair)) {
         unicode = 0x10000 + ((unicode & 0x3FF) << 10) + (surrogatePair & 0x3FF);
       } else
@@ -685,22 +692,19 @@
     } else
       return addError("expecting another \\u token to begin the second half of "
                       "a unicode surrogate pair",
-                      token,
-                      current);
+                      token, current);
   }
   return true;
 }
 
-bool Reader::decodeUnicodeEscapeSequence(Token& token,
-                                         Location& current,
+bool Reader::decodeUnicodeEscapeSequence(Token& token, Location& current,
                                          Location end,
-                                         unsigned int& unicode) {
+                                         unsigned int& ret_unicode) {
   if (end - current < 4)
     return addError(
-        "Bad unicode escape sequence in string: four digits expected.",
-        token,
+        "Bad unicode escape sequence in string: four digits expected.", token,
         current);
-  unicode = 0;
+  int unicode = 0;
   for (int index = 0; index < 4; ++index) {
     Char c = *current++;
     unicode *= 16;
@@ -713,14 +717,13 @@
     else
       return addError(
           "Bad unicode escape sequence in string: hexadecimal digit expected.",
-          token,
-          current);
+          token, current);
   }
+  ret_unicode = static_cast<unsigned int>(unicode);
   return true;
 }
 
-bool
-Reader::addError(const std::string& message, Token& token, Location extra) {
+bool Reader::addError(const String& message, Token& token, Location extra) {
   ErrorInfo info;
   info.token_ = token;
   info.message_ = message;
@@ -730,7 +733,7 @@
 }
 
 bool Reader::recoverFromError(TokenType skipUntilToken) {
-  int errorCount = int(errors_.size());
+  size_t const errorCount = errors_.size();
   Token skip;
   for (;;) {
     if (!readToken(skip))
@@ -742,8 +745,7 @@
   return false;
 }
 
-bool Reader::addErrorAndRecover(const std::string& message,
-                                Token& token,
+bool Reader::addErrorAndRecover(const String& message, Token& token,
                                 TokenType skipUntilToken) {
   addError(message, token);
   return recoverFromError(skipUntilToken);
@@ -757,8 +759,7 @@
   return *current_++;
 }
 
-void Reader::getLocationLineAndColumn(Location location,
-                                      int& line,
+void Reader::getLocationLineAndColumn(Location location, int& line,
                                       int& column) const {
   Location current = begin_;
   Location lastLineStart = current;
@@ -780,33 +781,22 @@
   ++line;
 }
 
-std::string Reader::getLocationLineAndColumn(Location location) const {
+String Reader::getLocationLineAndColumn(Location location) const {
   int line, column;
   getLocationLineAndColumn(location, line, column);
   char buffer[18 + 16 + 16 + 1];
-#if defined(_MSC_VER) && defined(__STDC_SECURE_LIB__)
-#if defined(WINCE)
-  _snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
-#else
-  sprintf_s(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
-#endif
-#else
-  snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
-#endif
+  jsoncpp_snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
   return buffer;
 }
 
 // Deprecated. Preserved for backward compatibility
-std::string Reader::getFormatedErrorMessages() const {
+String Reader::getFormatedErrorMessages() const {
   return getFormattedErrorMessages();
 }
 
-std::string Reader::getFormattedErrorMessages() const {
-  std::string formattedMessage;
-  for (Errors::const_iterator itError = errors_.begin();
-       itError != errors_.end();
-       ++itError) {
-    const ErrorInfo& error = *itError;
+String Reader::getFormattedErrorMessages() const {
+  String formattedMessage;
+  for (const auto& error : errors_) {
     formattedMessage +=
         "* " + getLocationLineAndColumn(error.token_.start_) + "\n";
     formattedMessage += "  " + error.message_ + "\n";
@@ -819,10 +809,7 @@
 
 std::vector<Reader::StructuredError> Reader::getStructuredErrors() const {
   std::vector<Reader::StructuredError> allErrors;
-  for (Errors::const_iterator itError = errors_.begin();
-       itError != errors_.end();
-       ++itError) {
-    const ErrorInfo& error = *itError;
+  for (const auto& error : errors_) {
     Reader::StructuredError structured;
     structured.offset_start = error.token_.start_ - begin_;
     structured.offset_limit = error.token_.end_ - begin_;
@@ -832,28 +819,27 @@
   return allErrors;
 }
 
-bool Reader::pushError(const Value& value, const std::string& message) {
-  size_t length = end_ - begin_;
-  if(value.getOffsetStart() > length
-    || value.getOffsetLimit() > length)
+bool Reader::pushError(const Value& value, const String& message) {
+  ptrdiff_t const length = end_ - begin_;
+  if (value.getOffsetStart() > length || value.getOffsetLimit() > length)
     return false;
   Token token;
   token.type_ = tokenError;
   token.start_ = begin_ + value.getOffsetStart();
-  token.end_ = end_ + value.getOffsetLimit();
+  token.end_ = begin_ + value.getOffsetLimit();
   ErrorInfo info;
   info.token_ = token;
   info.message_ = message;
-  info.extra_ = 0;
+  info.extra_ = nullptr;
   errors_.push_back(info);
   return true;
 }
 
-bool Reader::pushError(const Value& value, const std::string& message, const Value& extra) {
-  size_t length = end_ - begin_;
-  if(value.getOffsetStart() > length
-    || value.getOffsetLimit() > length
-    || extra.getOffsetLimit() > length)
+bool Reader::pushError(const Value& value, const String& message,
+                       const Value& extra) {
+  ptrdiff_t const length = end_ - begin_;
+  if (value.getOffsetStart() > length || value.getOffsetLimit() > length ||
+      extra.getOffsetLimit() > length)
     return false;
   Token token;
   token.type_ = tokenError;
@@ -867,19 +853,1139 @@
   return true;
 }
 
-bool Reader::good() const {
-  return !errors_.size();
+bool Reader::good() const { return errors_.empty(); }
+
+// Originally copied from the Features class (now deprecated), used internally
+// for features implementation.
+class OurFeatures {
+public:
+  static OurFeatures all();
+  bool allowComments_;
+  bool allowTrailingCommas_;
+  bool strictRoot_;
+  bool allowDroppedNullPlaceholders_;
+  bool allowNumericKeys_;
+  bool allowSingleQuotes_;
+  bool failIfExtra_;
+  bool rejectDupKeys_;
+  bool allowSpecialFloats_;
+  bool skipBom_;
+  size_t stackLimit_;
+}; // OurFeatures
+
+OurFeatures OurFeatures::all() { return {}; }
+
+// Implementation of class Reader
+// ////////////////////////////////
+
+// Originally copied from the Reader class (now deprecated), used internally
+// for implementing JSON reading.
+class OurReader {
+public:
+  using Char = char;
+  using Location = const Char*;
+  struct StructuredError {
+    ptrdiff_t offset_start;
+    ptrdiff_t offset_limit;
+    String message;
+  };
+
+  explicit OurReader(OurFeatures const& features);
+  bool parse(const char* beginDoc, const char* endDoc, Value& root,
+             bool collectComments = true);
+  String getFormattedErrorMessages() const;
+  std::vector<StructuredError> getStructuredErrors() const;
+
+private:
+  OurReader(OurReader const&);      // no impl
+  void operator=(OurReader const&); // no impl
+
+  enum TokenType {
+    tokenEndOfStream = 0,
+    tokenObjectBegin,
+    tokenObjectEnd,
+    tokenArrayBegin,
+    tokenArrayEnd,
+    tokenString,
+    tokenNumber,
+    tokenTrue,
+    tokenFalse,
+    tokenNull,
+    tokenNaN,
+    tokenPosInf,
+    tokenNegInf,
+    tokenArraySeparator,
+    tokenMemberSeparator,
+    tokenComment,
+    tokenError
+  };
+
+  class Token {
+  public:
+    TokenType type_;
+    Location start_;
+    Location end_;
+  };
+
+  class ErrorInfo {
+  public:
+    Token token_;
+    String message_;
+    Location extra_;
+  };
+
+  using Errors = std::deque<ErrorInfo>;
+
+  bool readToken(Token& token);
+  void skipSpaces();
+  void skipBom(bool skipBom);
+  bool match(const Char* pattern, int patternLength);
+  bool readComment();
+  bool readCStyleComment(bool* containsNewLineResult);
+  bool readCppStyleComment();
+  bool readString();
+  bool readStringSingleQuote();
+  bool readNumber(bool checkInf);
+  bool readValue();
+  bool readObject(Token& token);
+  bool readArray(Token& token);
+  bool decodeNumber(Token& token);
+  bool decodeNumber(Token& token, Value& decoded);
+  bool decodeString(Token& token);
+  bool decodeString(Token& token, String& decoded);
+  bool decodeDouble(Token& token);
+  bool decodeDouble(Token& token, Value& decoded);
+  bool decodeUnicodeCodePoint(Token& token, Location& current, Location end,
+                              unsigned int& unicode);
+  bool decodeUnicodeEscapeSequence(Token& token, Location& current,
+                                   Location end, unsigned int& unicode);
+  bool addError(const String& message, Token& token, Location extra = nullptr);
+  bool recoverFromError(TokenType skipUntilToken);
+  bool addErrorAndRecover(const String& message, Token& token,
+                          TokenType skipUntilToken);
+  void skipUntilSpace();
+  Value& currentValue();
+  Char getNextChar();
+  void getLocationLineAndColumn(Location location, int& line,
+                                int& column) const;
+  String getLocationLineAndColumn(Location location) const;
+  void addComment(Location begin, Location end, CommentPlacement placement);
+  void skipCommentTokens(Token& token);
+
+  static String normalizeEOL(Location begin, Location end);
+  static bool containsNewLine(Location begin, Location end);
+
+  using Nodes = std::stack<Value*>;
+
+  Nodes nodes_{};
+  Errors errors_{};
+  String document_{};
+  Location begin_ = nullptr;
+  Location end_ = nullptr;
+  Location current_ = nullptr;
+  Location lastValueEnd_ = nullptr;
+  Value* lastValue_ = nullptr;
+  bool lastValueHasAComment_ = false;
+  String commentsBefore_{};
+
+  OurFeatures const features_;
+  bool collectComments_ = false;
+}; // OurReader
+
+// complete copy of Read impl, for OurReader
+
+bool OurReader::containsNewLine(OurReader::Location begin,
+                                OurReader::Location end) {
+  return std::any_of(begin, end, [](char b) { return b == '\n' || b == '\r'; });
 }
 
-std::istream& operator>>(std::istream& sin, Value& root) {
-  Json::Reader reader;
-  bool ok = reader.parse(sin, root, true);
-  if (!ok) {
-    fprintf(stderr,
-            "Error from reader: %s",
-            reader.getFormattedErrorMessages().c_str());
+OurReader::OurReader(OurFeatures const& features) : features_(features) {}
 
-    JSON_FAIL_MESSAGE("reader error");
+bool OurReader::parse(const char* beginDoc, const char* endDoc, Value& root,
+                      bool collectComments) {
+  if (!features_.allowComments_) {
+    collectComments = false;
+  }
+
+  begin_ = beginDoc;
+  end_ = endDoc;
+  collectComments_ = collectComments;
+  current_ = begin_;
+  lastValueEnd_ = nullptr;
+  lastValue_ = nullptr;
+  commentsBefore_.clear();
+  errors_.clear();
+  while (!nodes_.empty())
+    nodes_.pop();
+  nodes_.push(&root);
+
+  // skip byte order mark if it exists at the beginning of the UTF-8 text.
+  skipBom(features_.skipBom_);
+  bool successful = readValue();
+  nodes_.pop();
+  Token token;
+  skipCommentTokens(token);
+  if (features_.failIfExtra_ && (token.type_ != tokenEndOfStream)) {
+    addError("Extra non-whitespace after JSON value.", token);
+    return false;
+  }
+  if (collectComments_ && !commentsBefore_.empty())
+    root.setComment(commentsBefore_, commentAfter);
+  if (features_.strictRoot_) {
+    if (!root.isArray() && !root.isObject()) {
+      // Set error location to start of doc, ideally should be first token found
+      // in doc
+      token.type_ = tokenError;
+      token.start_ = beginDoc;
+      token.end_ = endDoc;
+      addError(
+          "A valid JSON document must be either an array or an object value.",
+          token);
+      return false;
+    }
+  }
+  return successful;
+}
+
+bool OurReader::readValue() {
+  //  To preserve the old behaviour we cast size_t to int.
+  if (nodes_.size() > features_.stackLimit_)
+    throwRuntimeError("Exceeded stackLimit in readValue().");
+  Token token;
+  skipCommentTokens(token);
+  bool successful = true;
+
+  if (collectComments_ && !commentsBefore_.empty()) {
+    currentValue().setComment(commentsBefore_, commentBefore);
+    commentsBefore_.clear();
+  }
+
+  switch (token.type_) {
+  case tokenObjectBegin:
+    successful = readObject(token);
+    currentValue().setOffsetLimit(current_ - begin_);
+    break;
+  case tokenArrayBegin:
+    successful = readArray(token);
+    currentValue().setOffsetLimit(current_ - begin_);
+    break;
+  case tokenNumber:
+    successful = decodeNumber(token);
+    break;
+  case tokenString:
+    successful = decodeString(token);
+    break;
+  case tokenTrue: {
+    Value v(true);
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenFalse: {
+    Value v(false);
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenNull: {
+    Value v;
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenNaN: {
+    Value v(std::numeric_limits<double>::quiet_NaN());
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenPosInf: {
+    Value v(std::numeric_limits<double>::infinity());
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenNegInf: {
+    Value v(-std::numeric_limits<double>::infinity());
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenArraySeparator:
+  case tokenObjectEnd:
+  case tokenArrayEnd:
+    if (features_.allowDroppedNullPlaceholders_) {
+      // "Un-read" the current token and mark the current value as a null
+      // token.
+      current_--;
+      Value v;
+      currentValue().swapPayload(v);
+      currentValue().setOffsetStart(current_ - begin_ - 1);
+      currentValue().setOffsetLimit(current_ - begin_);
+      break;
+    } // else, fall through ...
+  default:
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+    return addError("Syntax error: value, object or array expected.", token);
+  }
+
+  if (collectComments_) {
+    lastValueEnd_ = current_;
+    lastValueHasAComment_ = false;
+    lastValue_ = &currentValue();
+  }
+
+  return successful;
+}
+
+void OurReader::skipCommentTokens(Token& token) {
+  if (features_.allowComments_) {
+    do {
+      readToken(token);
+    } while (token.type_ == tokenComment);
+  } else {
+    readToken(token);
+  }
+}
+
+bool OurReader::readToken(Token& token) {
+  skipSpaces();
+  token.start_ = current_;
+  Char c = getNextChar();
+  bool ok = true;
+  switch (c) {
+  case '{':
+    token.type_ = tokenObjectBegin;
+    break;
+  case '}':
+    token.type_ = tokenObjectEnd;
+    break;
+  case '[':
+    token.type_ = tokenArrayBegin;
+    break;
+  case ']':
+    token.type_ = tokenArrayEnd;
+    break;
+  case '"':
+    token.type_ = tokenString;
+    ok = readString();
+    break;
+  case '\'':
+    if (features_.allowSingleQuotes_) {
+      token.type_ = tokenString;
+      ok = readStringSingleQuote();
+    } else {
+      // If we don't allow single quotes, this is a failure case.
+      ok = false;
+    }
+    break;
+  case '/':
+    token.type_ = tokenComment;
+    ok = readComment();
+    break;
+  case '0':
+  case '1':
+  case '2':
+  case '3':
+  case '4':
+  case '5':
+  case '6':
+  case '7':
+  case '8':
+  case '9':
+    token.type_ = tokenNumber;
+    readNumber(false);
+    break;
+  case '-':
+    if (readNumber(true)) {
+      token.type_ = tokenNumber;
+    } else {
+      token.type_ = tokenNegInf;
+      ok = features_.allowSpecialFloats_ && match("nfinity", 7);
+    }
+    break;
+  case '+':
+    if (readNumber(true)) {
+      token.type_ = tokenNumber;
+    } else {
+      token.type_ = tokenPosInf;
+      ok = features_.allowSpecialFloats_ && match("nfinity", 7);
+    }
+    break;
+  case 't':
+    token.type_ = tokenTrue;
+    ok = match("rue", 3);
+    break;
+  case 'f':
+    token.type_ = tokenFalse;
+    ok = match("alse", 4);
+    break;
+  case 'n':
+    token.type_ = tokenNull;
+    ok = match("ull", 3);
+    break;
+  case 'N':
+    if (features_.allowSpecialFloats_) {
+      token.type_ = tokenNaN;
+      ok = match("aN", 2);
+    } else {
+      ok = false;
+    }
+    break;
+  case 'I':
+    if (features_.allowSpecialFloats_) {
+      token.type_ = tokenPosInf;
+      ok = match("nfinity", 7);
+    } else {
+      ok = false;
+    }
+    break;
+  case ',':
+    token.type_ = tokenArraySeparator;
+    break;
+  case ':':
+    token.type_ = tokenMemberSeparator;
+    break;
+  case 0:
+    token.type_ = tokenEndOfStream;
+    break;
+  default:
+    ok = false;
+    break;
+  }
+  if (!ok)
+    token.type_ = tokenError;
+  token.end_ = current_;
+  return ok;
+}
+
+void OurReader::skipSpaces() {
+  while (current_ != end_) {
+    Char c = *current_;
+    if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
+      ++current_;
+    else
+      break;
+  }
+}
+
+void OurReader::skipBom(bool skipBom) {
+  // The default behavior is to skip BOM.
+  if (skipBom) {
+    if ((end_ - begin_) >= 3 && strncmp(begin_, "\xEF\xBB\xBF", 3) == 0) {
+      begin_ += 3;
+      current_ = begin_;
+    }
+  }
+}
+
+bool OurReader::match(const Char* pattern, int patternLength) {
+  if (end_ - current_ < patternLength)
+    return false;
+  int index = patternLength;
+  while (index--)
+    if (current_[index] != pattern[index])
+      return false;
+  current_ += patternLength;
+  return true;
+}
+
+bool OurReader::readComment() {
+  const Location commentBegin = current_ - 1;
+  const Char c = getNextChar();
+  bool successful = false;
+  bool cStyleWithEmbeddedNewline = false;
+
+  const bool isCStyleComment = (c == '*');
+  const bool isCppStyleComment = (c == '/');
+  if (isCStyleComment) {
+    successful = readCStyleComment(&cStyleWithEmbeddedNewline);
+  } else if (isCppStyleComment) {
+    successful = readCppStyleComment();
+  }
+
+  if (!successful)
+    return false;
+
+  if (collectComments_) {
+    CommentPlacement placement = commentBefore;
+
+    if (!lastValueHasAComment_) {
+      if (lastValueEnd_ && !containsNewLine(lastValueEnd_, commentBegin)) {
+        if (isCppStyleComment || !cStyleWithEmbeddedNewline) {
+          placement = commentAfterOnSameLine;
+          lastValueHasAComment_ = true;
+        }
+      }
+    }
+
+    addComment(commentBegin, current_, placement);
+  }
+  return true;
+}
+
+String OurReader::normalizeEOL(OurReader::Location begin,
+                               OurReader::Location end) {
+  String normalized;
+  normalized.reserve(static_cast<size_t>(end - begin));
+  OurReader::Location current = begin;
+  while (current != end) {
+    char c = *current++;
+    if (c == '\r') {
+      if (current != end && *current == '\n')
+        // convert dos EOL
+        ++current;
+      // convert Mac EOL
+      normalized += '\n';
+    } else {
+      normalized += c;
+    }
+  }
+  return normalized;
+}
+
+void OurReader::addComment(Location begin, Location end,
+                           CommentPlacement placement) {
+  assert(collectComments_);
+  const String& normalized = normalizeEOL(begin, end);
+  if (placement == commentAfterOnSameLine) {
+    assert(lastValue_ != nullptr);
+    lastValue_->setComment(normalized, placement);
+  } else {
+    commentsBefore_ += normalized;
+  }
+}
+
+bool OurReader::readCStyleComment(bool* containsNewLineResult) {
+  *containsNewLineResult = false;
+
+  while ((current_ + 1) < end_) {
+    Char c = getNextChar();
+    if (c == '*' && *current_ == '/')
+      break;
+    if (c == '\n')
+      *containsNewLineResult = true;
+  }
+
+  return getNextChar() == '/';
+}
+
+bool OurReader::readCppStyleComment() {
+  while (current_ != end_) {
+    Char c = getNextChar();
+    if (c == '\n')
+      break;
+    if (c == '\r') {
+      // Consume DOS EOL. It will be normalized in addComment.
+      if (current_ != end_ && *current_ == '\n')
+        getNextChar();
+      // Break on Moc OS 9 EOL.
+      break;
+    }
+  }
+  return true;
+}
+
+bool OurReader::readNumber(bool checkInf) {
+  Location p = current_;
+  if (checkInf && p != end_ && *p == 'I') {
+    current_ = ++p;
+    return false;
+  }
+  char c = '0'; // stopgap for already consumed character
+  // integral part
+  while (c >= '0' && c <= '9')
+    c = (current_ = p) < end_ ? *p++ : '\0';
+  // fractional part
+  if (c == '.') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+  }
+  // exponential part
+  if (c == 'e' || c == 'E') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    if (c == '+' || c == '-')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+  }
+  return true;
+}
+bool OurReader::readString() {
+  Char c = 0;
+  while (current_ != end_) {
+    c = getNextChar();
+    if (c == '\\')
+      getNextChar();
+    else if (c == '"')
+      break;
+  }
+  return c == '"';
+}
+
+bool OurReader::readStringSingleQuote() {
+  Char c = 0;
+  while (current_ != end_) {
+    c = getNextChar();
+    if (c == '\\')
+      getNextChar();
+    else if (c == '\'')
+      break;
+  }
+  return c == '\'';
+}
+
+bool OurReader::readObject(Token& token) {
+  Token tokenName;
+  String name;
+  Value init(objectValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  while (readToken(tokenName)) {
+    bool initialTokenOk = true;
+    while (tokenName.type_ == tokenComment && initialTokenOk)
+      initialTokenOk = readToken(tokenName);
+    if (!initialTokenOk)
+      break;
+    if (tokenName.type_ == tokenObjectEnd &&
+        (name.empty() ||
+         features_.allowTrailingCommas_)) // empty object or trailing comma
+      return true;
+    name.clear();
+    if (tokenName.type_ == tokenString) {
+      if (!decodeString(tokenName, name))
+        return recoverFromError(tokenObjectEnd);
+    } else if (tokenName.type_ == tokenNumber && features_.allowNumericKeys_) {
+      Value numberName;
+      if (!decodeNumber(tokenName, numberName))
+        return recoverFromError(tokenObjectEnd);
+      name = numberName.asString();
+    } else {
+      break;
+    }
+    if (name.length() >= (1U << 30))
+      throwRuntimeError("keylength >= 2^30");
+    if (features_.rejectDupKeys_ && currentValue().isMember(name)) {
+      String msg = "Duplicate key: '" + name + "'";
+      return addErrorAndRecover(msg, tokenName, tokenObjectEnd);
+    }
+
+    Token colon;
+    if (!readToken(colon) || colon.type_ != tokenMemberSeparator) {
+      return addErrorAndRecover("Missing ':' after object member name", colon,
+                                tokenObjectEnd);
+    }
+    Value& value = currentValue()[name];
+    nodes_.push(&value);
+    bool ok = readValue();
+    nodes_.pop();
+    if (!ok) // error already set
+      return recoverFromError(tokenObjectEnd);
+
+    Token comma;
+    if (!readToken(comma) ||
+        (comma.type_ != tokenObjectEnd && comma.type_ != tokenArraySeparator &&
+         comma.type_ != tokenComment)) {
+      return addErrorAndRecover("Missing ',' or '}' in object declaration",
+                                comma, tokenObjectEnd);
+    }
+    bool finalizeTokenOk = true;
+    while (comma.type_ == tokenComment && finalizeTokenOk)
+      finalizeTokenOk = readToken(comma);
+    if (comma.type_ == tokenObjectEnd)
+      return true;
+  }
+  return addErrorAndRecover("Missing '}' or object member name", tokenName,
+                            tokenObjectEnd);
+}
+
+bool OurReader::readArray(Token& token) {
+  Value init(arrayValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  int index = 0;
+  for (;;) {
+    skipSpaces();
+    if (current_ != end_ && *current_ == ']' &&
+        (index == 0 ||
+         (features_.allowTrailingCommas_ &&
+          !features_.allowDroppedNullPlaceholders_))) // empty array or trailing
+                                                      // comma
+    {
+      Token endArray;
+      readToken(endArray);
+      return true;
+    }
+    Value& value = currentValue()[index++];
+    nodes_.push(&value);
+    bool ok = readValue();
+    nodes_.pop();
+    if (!ok) // error already set
+      return recoverFromError(tokenArrayEnd);
+
+    Token currentToken;
+    // Accept Comment after last item in the array.
+    ok = readToken(currentToken);
+    while (currentToken.type_ == tokenComment && ok) {
+      ok = readToken(currentToken);
+    }
+    bool badTokenType = (currentToken.type_ != tokenArraySeparator &&
+                         currentToken.type_ != tokenArrayEnd);
+    if (!ok || badTokenType) {
+      return addErrorAndRecover("Missing ',' or ']' in array declaration",
+                                currentToken, tokenArrayEnd);
+    }
+    if (currentToken.type_ == tokenArrayEnd)
+      break;
+  }
+  return true;
+}
+
+bool OurReader::decodeNumber(Token& token) {
+  Value decoded;
+  if (!decodeNumber(token, decoded))
+    return false;
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool OurReader::decodeNumber(Token& token, Value& decoded) {
+  // Attempts to parse the number as an integer. If the number is
+  // larger than the maximum supported value of an integer then
+  // we decode the number as a double.
+  Location current = token.start_;
+  const bool isNegative = *current == '-';
+  if (isNegative) {
+    ++current;
+  }
+
+  // We assume we can represent the largest and smallest integer types as
+  // unsigned integers with separate sign. This is only true if they can fit
+  // into an unsigned integer.
+  static_assert(Value::maxLargestInt <= Value::maxLargestUInt,
+                "Int must be smaller than UInt");
+
+  // We need to convert minLargestInt into a positive number. The easiest way
+  // to do this conversion is to assume our "threshold" value of minLargestInt
+  // divided by 10 can fit in maxLargestInt when absolute valued. This should
+  // be a safe assumption.
+  static_assert(Value::minLargestInt <= -Value::maxLargestInt,
+                "The absolute value of minLargestInt must be greater than or "
+                "equal to maxLargestInt");
+  static_assert(Value::minLargestInt / 10 >= -Value::maxLargestInt,
+                "The absolute value of minLargestInt must be only 1 magnitude "
+                "larger than maxLargest Int");
+
+  static constexpr Value::LargestUInt positive_threshold =
+      Value::maxLargestUInt / 10;
+  static constexpr Value::UInt positive_last_digit = Value::maxLargestUInt % 10;
+
+  // For the negative values, we have to be more careful. Since typically
+  // -Value::minLargestInt will cause an overflow, we first divide by 10 and
+  // then take the inverse. This assumes that minLargestInt is only a single
+  // power of 10 different in magnitude, which we check above. For the last
+  // digit, we take the modulus before negating for the same reason.
+  static constexpr auto negative_threshold =
+      Value::LargestUInt(-(Value::minLargestInt / 10));
+  static constexpr auto negative_last_digit =
+      Value::UInt(-(Value::minLargestInt % 10));
+
+  const Value::LargestUInt threshold =
+      isNegative ? negative_threshold : positive_threshold;
+  const Value::UInt max_last_digit =
+      isNegative ? negative_last_digit : positive_last_digit;
+
+  Value::LargestUInt value = 0;
+  while (current < token.end_) {
+    Char c = *current++;
+    if (c < '0' || c > '9')
+      return decodeDouble(token, decoded);
+
+    const auto digit(static_cast<Value::UInt>(c - '0'));
+    if (value >= threshold) {
+      // We've hit or exceeded the max value divided by 10 (rounded down). If
+      // a) we've only just touched the limit, meaing value == threshold,
+      // b) this is the last digit, or
+      // c) it's small enough to fit in that rounding delta, we're okay.
+      // Otherwise treat this number as a double to avoid overflow.
+      if (value > threshold || current != token.end_ ||
+          digit > max_last_digit) {
+        return decodeDouble(token, decoded);
+      }
+    }
+    value = value * 10 + digit;
+  }
+
+  if (isNegative) {
+    // We use the same magnitude assumption here, just in case.
+    const auto last_digit = static_cast<Value::UInt>(value % 10);
+    decoded = -Value::LargestInt(value / 10) * 10 - last_digit;
+  } else if (value <= Value::LargestUInt(Value::maxLargestInt)) {
+    decoded = Value::LargestInt(value);
+  } else {
+    decoded = value;
+  }
+
+  return true;
+}
+
+bool OurReader::decodeDouble(Token& token) {
+  Value decoded;
+  if (!decodeDouble(token, decoded))
+    return false;
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool OurReader::decodeDouble(Token& token, Value& decoded) {
+  double value = 0;
+  const String buffer(token.start_, token.end_);
+  IStringStream is(buffer);
+  if (!(is >> value)) {
+    return addError(
+        "'" + String(token.start_, token.end_) + "' is not a number.", token);
+  }
+  decoded = value;
+  return true;
+}
+
+bool OurReader::decodeString(Token& token) {
+  String decoded_string;
+  if (!decodeString(token, decoded_string))
+    return false;
+  Value decoded(decoded_string);
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool OurReader::decodeString(Token& token, String& decoded) {
+  decoded.reserve(static_cast<size_t>(token.end_ - token.start_ - 2));
+  Location current = token.start_ + 1; // skip '"'
+  Location end = token.end_ - 1;       // do not include '"'
+  while (current != end) {
+    Char c = *current++;
+    if (c == '"')
+      break;
+    if (c == '\\') {
+      if (current == end)
+        return addError("Empty escape sequence in string", token, current);
+      Char escape = *current++;
+      switch (escape) {
+      case '"':
+        decoded += '"';
+        break;
+      case '/':
+        decoded += '/';
+        break;
+      case '\\':
+        decoded += '\\';
+        break;
+      case 'b':
+        decoded += '\b';
+        break;
+      case 'f':
+        decoded += '\f';
+        break;
+      case 'n':
+        decoded += '\n';
+        break;
+      case 'r':
+        decoded += '\r';
+        break;
+      case 't':
+        decoded += '\t';
+        break;
+      case 'u': {
+        unsigned int unicode;
+        if (!decodeUnicodeCodePoint(token, current, end, unicode))
+          return false;
+        decoded += codePointToUTF8(unicode);
+      } break;
+      default:
+        return addError("Bad escape sequence in string", token, current);
+      }
+    } else {
+      decoded += c;
+    }
+  }
+  return true;
+}
+
+bool OurReader::decodeUnicodeCodePoint(Token& token, Location& current,
+                                       Location end, unsigned int& unicode) {
+
+  if (!decodeUnicodeEscapeSequence(token, current, end, unicode))
+    return false;
+  if (unicode >= 0xD800 && unicode <= 0xDBFF) {
+    // surrogate pairs
+    if (end - current < 6)
+      return addError(
+          "additional six characters expected to parse unicode surrogate pair.",
+          token, current);
+    if (*(current++) == '\\' && *(current++) == 'u') {
+      unsigned int surrogatePair;
+      if (decodeUnicodeEscapeSequence(token, current, end, surrogatePair)) {
+        unicode = 0x10000 + ((unicode & 0x3FF) << 10) + (surrogatePair & 0x3FF);
+      } else
+        return false;
+    } else
+      return addError("expecting another \\u token to begin the second half of "
+                      "a unicode surrogate pair",
+                      token, current);
+  }
+  return true;
+}
+
+bool OurReader::decodeUnicodeEscapeSequence(Token& token, Location& current,
+                                            Location end,
+                                            unsigned int& ret_unicode) {
+  if (end - current < 4)
+    return addError(
+        "Bad unicode escape sequence in string: four digits expected.", token,
+        current);
+  int unicode = 0;
+  for (int index = 0; index < 4; ++index) {
+    Char c = *current++;
+    unicode *= 16;
+    if (c >= '0' && c <= '9')
+      unicode += c - '0';
+    else if (c >= 'a' && c <= 'f')
+      unicode += c - 'a' + 10;
+    else if (c >= 'A' && c <= 'F')
+      unicode += c - 'A' + 10;
+    else
+      return addError(
+          "Bad unicode escape sequence in string: hexadecimal digit expected.",
+          token, current);
+  }
+  ret_unicode = static_cast<unsigned int>(unicode);
+  return true;
+}
+
+bool OurReader::addError(const String& message, Token& token, Location extra) {
+  ErrorInfo info;
+  info.token_ = token;
+  info.message_ = message;
+  info.extra_ = extra;
+  errors_.push_back(info);
+  return false;
+}
+
+bool OurReader::recoverFromError(TokenType skipUntilToken) {
+  size_t errorCount = errors_.size();
+  Token skip;
+  for (;;) {
+    if (!readToken(skip))
+      errors_.resize(errorCount); // discard errors caused by recovery
+    if (skip.type_ == skipUntilToken || skip.type_ == tokenEndOfStream)
+      break;
+  }
+  errors_.resize(errorCount);
+  return false;
+}
+
+bool OurReader::addErrorAndRecover(const String& message, Token& token,
+                                   TokenType skipUntilToken) {
+  addError(message, token);
+  return recoverFromError(skipUntilToken);
+}
+
+Value& OurReader::currentValue() { return *(nodes_.top()); }
+
+OurReader::Char OurReader::getNextChar() {
+  if (current_ == end_)
+    return 0;
+  return *current_++;
+}
+
+void OurReader::getLocationLineAndColumn(Location location, int& line,
+                                         int& column) const {
+  Location current = begin_;
+  Location lastLineStart = current;
+  line = 0;
+  while (current < location && current != end_) {
+    Char c = *current++;
+    if (c == '\r') {
+      if (*current == '\n')
+        ++current;
+      lastLineStart = current;
+      ++line;
+    } else if (c == '\n') {
+      lastLineStart = current;
+      ++line;
+    }
+  }
+  // column & line start at 1
+  column = int(location - lastLineStart) + 1;
+  ++line;
+}
+
+String OurReader::getLocationLineAndColumn(Location location) const {
+  int line, column;
+  getLocationLineAndColumn(location, line, column);
+  char buffer[18 + 16 + 16 + 1];
+  jsoncpp_snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
+  return buffer;
+}
+
+String OurReader::getFormattedErrorMessages() const {
+  String formattedMessage;
+  for (const auto& error : errors_) {
+    formattedMessage +=
+        "* " + getLocationLineAndColumn(error.token_.start_) + "\n";
+    formattedMessage += "  " + error.message_ + "\n";
+    if (error.extra_)
+      formattedMessage +=
+          "See " + getLocationLineAndColumn(error.extra_) + " for detail.\n";
+  }
+  return formattedMessage;
+}
+
+std::vector<OurReader::StructuredError> OurReader::getStructuredErrors() const {
+  std::vector<OurReader::StructuredError> allErrors;
+  for (const auto& error : errors_) {
+    OurReader::StructuredError structured;
+    structured.offset_start = error.token_.start_ - begin_;
+    structured.offset_limit = error.token_.end_ - begin_;
+    structured.message = error.message_;
+    allErrors.push_back(structured);
+  }
+  return allErrors;
+}
+
+class OurCharReader : public CharReader {
+  bool const collectComments_;
+  OurReader reader_;
+
+public:
+  OurCharReader(bool collectComments, OurFeatures const& features)
+      : collectComments_(collectComments), reader_(features) {}
+  bool parse(char const* beginDoc, char const* endDoc, Value* root,
+             String* errs) override {
+    bool ok = reader_.parse(beginDoc, endDoc, *root, collectComments_);
+    if (errs) {
+      *errs = reader_.getFormattedErrorMessages();
+    }
+    return ok;
+  }
+};
+
+CharReaderBuilder::CharReaderBuilder() { setDefaults(&settings_); }
+CharReaderBuilder::~CharReaderBuilder() = default;
+CharReader* CharReaderBuilder::newCharReader() const {
+  bool collectComments = settings_["collectComments"].asBool();
+  OurFeatures features = OurFeatures::all();
+  features.allowComments_ = settings_["allowComments"].asBool();
+  features.allowTrailingCommas_ = settings_["allowTrailingCommas"].asBool();
+  features.strictRoot_ = settings_["strictRoot"].asBool();
+  features.allowDroppedNullPlaceholders_ =
+      settings_["allowDroppedNullPlaceholders"].asBool();
+  features.allowNumericKeys_ = settings_["allowNumericKeys"].asBool();
+  features.allowSingleQuotes_ = settings_["allowSingleQuotes"].asBool();
+
+  // Stack limit is always a size_t, so we get this as an unsigned int
+  // regardless of it we have 64-bit integer support enabled.
+  features.stackLimit_ = static_cast<size_t>(settings_["stackLimit"].asUInt());
+  features.failIfExtra_ = settings_["failIfExtra"].asBool();
+  features.rejectDupKeys_ = settings_["rejectDupKeys"].asBool();
+  features.allowSpecialFloats_ = settings_["allowSpecialFloats"].asBool();
+  features.skipBom_ = settings_["skipBom"].asBool();
+  return new OurCharReader(collectComments, features);
+}
+
+bool CharReaderBuilder::validate(Json::Value* invalid) const {
+  static const auto& valid_keys = *new std::set<String>{
+      "collectComments",
+      "allowComments",
+      "allowTrailingCommas",
+      "strictRoot",
+      "allowDroppedNullPlaceholders",
+      "allowNumericKeys",
+      "allowSingleQuotes",
+      "stackLimit",
+      "failIfExtra",
+      "rejectDupKeys",
+      "allowSpecialFloats",
+      "skipBom",
+  };
+  for (auto si = settings_.begin(); si != settings_.end(); ++si) {
+    auto key = si.name();
+    if (valid_keys.count(key))
+      continue;
+    if (invalid)
+      (*invalid)[std::move(key)] = *si;
+    else
+      return false;
+  }
+  return invalid ? invalid->empty() : true;
+}
+
+Value& CharReaderBuilder::operator[](const String& key) {
+  return settings_[key];
+}
+// static
+void CharReaderBuilder::strictMode(Json::Value* settings) {
+  //! [CharReaderBuilderStrictMode]
+  (*settings)["allowComments"] = false;
+  (*settings)["allowTrailingCommas"] = false;
+  (*settings)["strictRoot"] = true;
+  (*settings)["allowDroppedNullPlaceholders"] = false;
+  (*settings)["allowNumericKeys"] = false;
+  (*settings)["allowSingleQuotes"] = false;
+  (*settings)["stackLimit"] = 1000;
+  (*settings)["failIfExtra"] = true;
+  (*settings)["rejectDupKeys"] = true;
+  (*settings)["allowSpecialFloats"] = false;
+  (*settings)["skipBom"] = true;
+  //! [CharReaderBuilderStrictMode]
+}
+// static
+void CharReaderBuilder::setDefaults(Json::Value* settings) {
+  //! [CharReaderBuilderDefaults]
+  (*settings)["collectComments"] = true;
+  (*settings)["allowComments"] = true;
+  (*settings)["allowTrailingCommas"] = true;
+  (*settings)["strictRoot"] = false;
+  (*settings)["allowDroppedNullPlaceholders"] = false;
+  (*settings)["allowNumericKeys"] = false;
+  (*settings)["allowSingleQuotes"] = false;
+  (*settings)["stackLimit"] = 1000;
+  (*settings)["failIfExtra"] = false;
+  (*settings)["rejectDupKeys"] = false;
+  (*settings)["allowSpecialFloats"] = false;
+  (*settings)["skipBom"] = true;
+  //! [CharReaderBuilderDefaults]
+}
+
+//////////////////////////////////
+// global functions
+
+bool parseFromStream(CharReader::Factory const& fact, IStream& sin, Value* root,
+                     String* errs) {
+  OStringStream ssin;
+  ssin << sin.rdbuf();
+  String doc = ssin.str();
+  char const* begin = doc.data();
+  char const* end = begin + doc.size();
+  // Note that we do not actually need a null-terminator.
+  CharReaderPtr const reader(fact.newCharReader());
+  return reader->parse(begin, end, root, errs);
+}
+
+IStream& operator>>(IStream& sin, Value& root) {
+  CharReaderBuilder b;
+  String errs;
+  bool ok = parseFromStream(b, sin, &root, &errs);
+  if (!ok) {
+    throwRuntimeError(errs);
   }
   return sin;
 }
diff --git a/src/lib_json/json_tool.h b/src/lib_json/json_tool.h
index f9b61c3..2d7b7d9 100644
--- a/src/lib_json/json_tool.h
+++ b/src/lib_json/json_tool.h
@@ -1,4 +1,4 @@
-// Copyright 2007-2010 Baptiste Lepilleur
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
@@ -6,6 +6,19 @@
 #ifndef LIB_JSONCPP_JSON_TOOL_H_INCLUDED
 #define LIB_JSONCPP_JSON_TOOL_H_INCLUDED
 
+#if !defined(JSON_IS_AMALGAMATION)
+#include <json/config.h>
+#endif
+
+// Also support old flag NO_LOCALE_SUPPORT
+#ifdef NO_LOCALE_SUPPORT
+#define JSONCPP_NO_LOCALE_SUPPORT
+#endif
+
+#ifndef JSONCPP_NO_LOCALE_SUPPORT
+#include <clocale>
+#endif
+
 /* This header provides common string manipulation support, such as UTF-8,
  * portable conversion from/to string...
  *
@@ -13,10 +26,18 @@
  */
 
 namespace Json {
+static inline char getDecimalPoint() {
+#ifdef JSONCPP_NO_LOCALE_SUPPORT
+  return '\0';
+#else
+  struct lconv* lc = localeconv();
+  return lc ? *(lc->decimal_point) : '\0';
+#endif
+}
 
 /// Converts a unicode code-point to UTF-8.
-static inline std::string codePointToUTF8(unsigned int cp) {
-  std::string result;
+static inline String codePointToUTF8(unsigned int cp) {
+  String result;
 
   // based on description from http://en.wikipedia.org/wiki/UTF-8
 
@@ -30,8 +51,8 @@
   } else if (cp <= 0xFFFF) {
     result.resize(3);
     result[2] = static_cast<char>(0x80 | (0x3f & cp));
-    result[1] = 0x80 | static_cast<char>((0x3f & (cp >> 6)));
-    result[0] = 0xE0 | static_cast<char>((0xf & (cp >> 12)));
+    result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
+    result[0] = static_cast<char>(0xE0 | (0xf & (cp >> 12)));
   } else if (cp <= 0x10FFFF) {
     result.resize(4);
     result[3] = static_cast<char>(0x80 | (0x3f & cp));
@@ -43,9 +64,6 @@
   return result;
 }
 
-/// Returns true if ch is a control character (in range [0,32[).
-static inline bool isControlCharacter(char ch) { return ch > 0 && ch <= 0x1F; }
-
 enum {
   /// Constant that specify the size of the buffer that must be passed to
   /// uintToString.
@@ -53,17 +71,17 @@
 };
 
 // Defines a char buffer for use with uintToString().
-typedef char UIntToStringBuffer[uintToStringBufferSize];
+using UIntToStringBuffer = char[uintToStringBufferSize];
 
 /** Converts an unsigned integer to string.
- * @param value Unsigned interger to convert to string
+ * @param value Unsigned integer to convert to string
  * @param current Input/Output string buffer.
  *        Must have at least uintToStringBufferSize chars free.
  */
 static inline void uintToString(LargestUInt value, char*& current) {
   *--current = 0;
   do {
-    *--current = char(value % 10) + '0';
+    *--current = static_cast<char>(value % 10U + static_cast<unsigned>('0'));
     value /= 10;
   } while (value != 0);
 }
@@ -73,15 +91,44 @@
  * We had a sophisticated way, but it did not work in WinCE.
  * @see https://github.com/open-source-parsers/jsoncpp/pull/9
  */
-static inline void fixNumericLocale(char* begin, char* end) {
-  while (begin < end) {
+template <typename Iter> Iter fixNumericLocale(Iter begin, Iter end) {
+  for (; begin != end; ++begin) {
     if (*begin == ',') {
       *begin = '.';
     }
-    ++begin;
+  }
+  return begin;
+}
+
+template <typename Iter> void fixNumericLocaleInput(Iter begin, Iter end) {
+  char decimalPoint = getDecimalPoint();
+  if (decimalPoint == '\0' || decimalPoint == '.') {
+    return;
+  }
+  for (; begin != end; ++begin) {
+    if (*begin == '.') {
+      *begin = decimalPoint;
+    }
   }
 }
 
-} // namespace Json {
+/**
+ * Return iterator that would be the new end of the range [begin,end), if we
+ * were to delete zeros in the end of string, but not the last zero before '.'.
+ */
+template <typename Iter> Iter fixZerosInTheEnd(Iter begin, Iter end) {
+  for (; begin != end; --end) {
+    if (*(end - 1) != '0') {
+      return end;
+    }
+    // Don't delete the last zero before the decimal point.
+    if (begin != (end - 1) && *(end - 2) == '.') {
+      return end;
+    }
+  }
+  return end;
+}
+
+} // namespace Json
 
 #endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED
diff --git a/src/lib_json/json_value.cpp b/src/lib_json/json_value.cpp
index b73deac..0872ff5 100644
--- a/src/lib_json/json_value.cpp
+++ b/src/lib_json/json_value.cpp
@@ -1,4 +1,4 @@
-// Copyright 2011 Baptiste Lepilleur
+// Copyright 2011 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
@@ -7,23 +7,55 @@
 #include <json/assertions.h>
 #include <json/value.h>
 #include <json/writer.h>
-#ifndef JSON_USE_SIMPLE_INTERNAL_ALLOCATOR
-#include "json_batchallocator.h"
-#endif // #ifndef JSON_USE_SIMPLE_INTERNAL_ALLOCATOR
 #endif // if !defined(JSON_IS_AMALGAMATION)
-#include <math.h>
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <cstddef>
+#include <cstring>
+#include <iostream>
 #include <sstream>
 #include <utility>
-#include <cstring>
-#include <cassert>
-#ifdef JSON_USE_CPPTL
-#include <cpptl/conststring.h>
+
+// Provide implementation equivalent of std::snprintf for older _MSC compilers
+#if defined(_MSC_VER) && _MSC_VER < 1900
+#include <stdarg.h>
+static int msvc_pre1900_c99_vsnprintf(char* outBuf, size_t size,
+                                      const char* format, va_list ap) {
+  int count = -1;
+  if (size != 0)
+    count = _vsnprintf_s(outBuf, size, _TRUNCATE, format, ap);
+  if (count == -1)
+    count = _vscprintf(format, ap);
+  return count;
+}
+
+int JSON_API msvc_pre1900_c99_snprintf(char* outBuf, size_t size,
+                                       const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  const int count = msvc_pre1900_c99_vsnprintf(outBuf, size, format, ap);
+  va_end(ap);
+  return count;
+}
 #endif
-#include <cstddef> // size_t
+
+// Disable warning C4702 : unreachable code
+#if defined(_MSC_VER)
+#pragma warning(disable : 4702)
+#endif
 
 #define JSON_ASSERT_UNREACHABLE assert(false)
 
 namespace Json {
+template <typename T>
+static std::unique_ptr<T> cloneUnique(const std::unique_ptr<T>& p) {
+  std::unique_ptr<T> r;
+  if (p) {
+    r = std::unique_ptr<T>(new T(*p));
+  }
+  return r;
+}
 
 // This is a walkaround to avoid the static initialization of Value::null.
 // kNull must be word-aligned to avoid crashing on ARM.  We use an alignment of
@@ -33,37 +65,34 @@
 #else
 #define ALIGNAS(byte_alignment)
 #endif
-static const unsigned char ALIGNAS(8) kNull[sizeof(Value)] = { 0 };
-const unsigned char& kNullRef = kNull[0];
-const Value& Value::null = reinterpret_cast<const Value&>(kNullRef);
 
-const Int Value::minInt = Int(~(UInt(-1) / 2));
-const Int Value::maxInt = Int(UInt(-1) / 2);
-const UInt Value::maxUInt = UInt(-1);
-#if defined(JSON_HAS_INT64)
-const Int64 Value::minInt64 = Int64(~(UInt64(-1) / 2));
-const Int64 Value::maxInt64 = Int64(UInt64(-1) / 2);
-const UInt64 Value::maxUInt64 = UInt64(-1);
-// The constant is hard-coded because some compiler have trouble
-// converting Value::maxUInt64 to a double correctly (AIX/xlC).
-// Assumes that UInt64 is a 64 bits integer.
-static const double maxUInt64AsDouble = 18446744073709551615.0;
-#endif // defined(JSON_HAS_INT64)
-const LargestInt Value::minLargestInt = LargestInt(~(LargestUInt(-1) / 2));
-const LargestInt Value::maxLargestInt = LargestInt(LargestUInt(-1) / 2);
-const LargestUInt Value::maxLargestUInt = LargestUInt(-1);
+// static
+Value const& Value::nullSingleton() {
+  static Value const nullStatic;
+  return nullStatic;
+}
 
-/// Unknown size marker
-static const unsigned int unknown = (unsigned)-1;
+#if JSON_USE_NULLREF
+// for backwards compatibility, we'll leave these global references around, but
+// DO NOT use them in JSONCPP library code any more!
+// static
+Value const& Value::null = Value::nullSingleton();
+
+// static
+Value const& Value::nullRef = Value::nullSingleton();
+#endif
 
 #if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
 template <typename T, typename U>
 static inline bool InRange(double d, T min, U max) {
-  return d >= min && d <= max;
+  // The casts can lose precision, but we are looking only for
+  // an approximate range. Might fail on edge cases though. ~cdunn
+  return d >= static_cast<double>(min) && d <= static_cast<double>(max);
 }
 #else  // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
 static inline double integerToDouble(Json::UInt64 value) {
-  return static_cast<double>(Int64(value / 2)) * 2.0 + Int64(value & 1);
+  return static_cast<double>(Int64(value / 2)) * 2.0 +
+         static_cast<double>(Int64(value & 1));
 }
 
 template <typename T> static inline double integerToDouble(T value) {
@@ -83,28 +112,76 @@
  *               computed using strlen(value).
  * @return Pointer on the duplicate instance of string.
  */
-static inline char* duplicateStringValue(const char* value,
-                                         unsigned int length = unknown) {
-  if (length == unknown)
-    length = (unsigned int)strlen(value);
-
+static inline char* duplicateStringValue(const char* value, size_t length) {
   // Avoid an integer overflow in the call to malloc below by limiting length
   // to a sane value.
-  if (length >= (unsigned)Value::maxInt)
+  if (length >= static_cast<size_t>(Value::maxInt))
     length = Value::maxInt - 1;
 
-  char* newString = static_cast<char*>(malloc(length + 1));
-  JSON_ASSERT_MESSAGE(newString != 0,
-                      "in Json::Value::duplicateStringValue(): "
+  auto newString = static_cast<char*>(malloc(length + 1));
+  if (newString == nullptr) {
+    throwRuntimeError("in Json::Value::duplicateStringValue(): "
                       "Failed to allocate string value buffer");
+  }
   memcpy(newString, value, length);
   newString[length] = 0;
   return newString;
 }
 
-/** Free the string duplicated by duplicateStringValue().
+/* Record the length as a prefix.
  */
-static inline void releaseStringValue(char* value) { free(value); }
+static inline char* duplicateAndPrefixStringValue(const char* value,
+                                                  unsigned int length) {
+  // Avoid an integer overflow in the call to malloc below by limiting length
+  // to a sane value.
+  JSON_ASSERT_MESSAGE(length <= static_cast<unsigned>(Value::maxInt) -
+                                    sizeof(unsigned) - 1U,
+                      "in Json::Value::duplicateAndPrefixStringValue(): "
+                      "length too big for prefixing");
+  size_t actualLength = sizeof(length) + length + 1;
+  auto newString = static_cast<char*>(malloc(actualLength));
+  if (newString == nullptr) {
+    throwRuntimeError("in Json::Value::duplicateAndPrefixStringValue(): "
+                      "Failed to allocate string value buffer");
+  }
+  *reinterpret_cast<unsigned*>(newString) = length;
+  memcpy(newString + sizeof(unsigned), value, length);
+  newString[actualLength - 1U] =
+      0; // to avoid buffer over-run accidents by users later
+  return newString;
+}
+inline static void decodePrefixedString(bool isPrefixed, char const* prefixed,
+                                        unsigned* length, char const** value) {
+  if (!isPrefixed) {
+    *length = static_cast<unsigned>(strlen(prefixed));
+    *value = prefixed;
+  } else {
+    *length = *reinterpret_cast<unsigned const*>(prefixed);
+    *value = prefixed + sizeof(unsigned);
+  }
+}
+/** Free the string duplicated by
+ * duplicateStringValue()/duplicateAndPrefixStringValue().
+ */
+#if JSONCPP_USING_SECURE_MEMORY
+static inline void releasePrefixedStringValue(char* value) {
+  unsigned length = 0;
+  char const* valueDecoded;
+  decodePrefixedString(true, value, &length, &valueDecoded);
+  size_t const size = sizeof(unsigned) + length + 1U;
+  memset(value, 0, size);
+  free(value);
+}
+static inline void releaseStringValue(char* value, unsigned length) {
+  // length==0 => we allocated the strings memory
+  size_t size = (length == 0) ? strlen(value) : length;
+  memset(value, 0, size);
+  free(value);
+}
+#else  // !JSONCPP_USING_SECURE_MEMORY
+static inline void releasePrefixedStringValue(char* value) { free(value); }
+static inline void releaseStringValue(char* value, unsigned) { free(value); }
+#endif // JSONCPP_USING_SECURE_MEMORY
 
 } // namespace Json
 
@@ -116,41 +193,34 @@
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
 #if !defined(JSON_IS_AMALGAMATION)
-#ifdef JSON_VALUE_USE_INTERNAL_MAP
-#include "json_internalarray.inl"
-#include "json_internalmap.inl"
-#endif // JSON_VALUE_USE_INTERNAL_MAP
 
 #include "json_valueiterator.inl"
 #endif // if !defined(JSON_IS_AMALGAMATION)
 
 namespace Json {
 
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// class Value::CommentInfo
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-// //////////////////////////////////////////////////////////////////
-
-Value::CommentInfo::CommentInfo() : comment_(0) {}
-
-Value::CommentInfo::~CommentInfo() {
-  if (comment_)
-    releaseStringValue(comment_);
+#if JSON_USE_EXCEPTION
+Exception::Exception(String msg) : msg_(std::move(msg)) {}
+Exception::~Exception() noexcept = default;
+char const* Exception::what() const noexcept { return msg_.c_str(); }
+RuntimeError::RuntimeError(String const& msg) : Exception(msg) {}
+LogicError::LogicError(String const& msg) : Exception(msg) {}
+JSONCPP_NORETURN void throwRuntimeError(String const& msg) {
+  throw RuntimeError(msg);
 }
-
-void Value::CommentInfo::setComment(const char* text) {
-  if (comment_)
-    releaseStringValue(comment_);
-  JSON_ASSERT(text != 0);
-  JSON_ASSERT_MESSAGE(
-      text[0] == '\0' || text[0] == '/',
-      "in Json::Value::setComment(): Comments must start with /");
-  // It seems that /**/ style comments are acceptable as well.
-  comment_ = duplicateStringValue(text);
+JSONCPP_NORETURN void throwLogicError(String const& msg) {
+  throw LogicError(msg);
 }
+#else // !JSON_USE_EXCEPTION
+JSONCPP_NORETURN void throwRuntimeError(String const& msg) {
+  std::cerr << msg << std::endl;
+  abort();
+}
+JSONCPP_NORETURN void throwLogicError(String const& msg) {
+  std::cerr << msg << std::endl;
+  abort();
+}
+#endif
 
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
@@ -159,29 +229,49 @@
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
 
-// Notes: index_ indicates if the string was allocated when
+// Notes: policy_ indicates if the string was allocated when
 // a string is stored.
 
-Value::CZString::CZString(ArrayIndex index) : cstr_(0), index_(index) {}
+Value::CZString::CZString(ArrayIndex index) : cstr_(nullptr), index_(index) {}
 
-Value::CZString::CZString(const char* cstr, DuplicationPolicy allocate)
-    : cstr_(allocate == duplicate ? duplicateStringValue(cstr) : cstr),
-      index_(allocate) {}
+Value::CZString::CZString(char const* str, unsigned length,
+                          DuplicationPolicy allocate)
+    : cstr_(str) {
+  // allocate != duplicate
+  storage_.policy_ = allocate & 0x3;
+  storage_.length_ = length & 0x3FFFFFFF;
+}
 
-Value::CZString::CZString(const CZString& other)
-    : cstr_(other.index_ != noDuplication && other.cstr_ != 0
-                ? duplicateStringValue(other.cstr_)
-                : other.cstr_),
-      index_(other.cstr_
-                 ? static_cast<ArrayIndex>(other.index_ == noDuplication
-                     ? noDuplication : duplicate)
-                 : other.index_) {}
+Value::CZString::CZString(const CZString& other) {
+  cstr_ = (other.storage_.policy_ != noDuplication && other.cstr_ != nullptr
+               ? duplicateStringValue(other.cstr_, other.storage_.length_)
+               : other.cstr_);
+  storage_.policy_ =
+      static_cast<unsigned>(
+          other.cstr_
+              ? (static_cast<DuplicationPolicy>(other.storage_.policy_) ==
+                         noDuplication
+                     ? noDuplication
+                     : duplicate)
+              : static_cast<DuplicationPolicy>(other.storage_.policy_)) &
+      3U;
+  storage_.length_ = other.storage_.length_;
+}
+
+Value::CZString::CZString(CZString&& other)
+    : cstr_(other.cstr_), index_(other.index_) {
+  other.cstr_ = nullptr;
+}
 
 Value::CZString::~CZString() {
-  if (cstr_ && index_ == duplicate)
-    releaseStringValue(const_cast<char*>(cstr_));
+  if (cstr_ && storage_.policy_ == duplicate) {
+    releaseStringValue(const_cast<char*>(cstr_),
+                       storage_.length_ + 1U); // +1 for null terminating
+                                               // character for sake of
+                                               // completeness but not actually
+                                               // necessary
+  }
 }
 
 void Value::CZString::swap(CZString& other) {
@@ -189,30 +279,58 @@
   std::swap(index_, other.index_);
 }
 
-Value::CZString& Value::CZString::operator=(CZString other) {
-  swap(other);
+Value::CZString& Value::CZString::operator=(const CZString& other) {
+  cstr_ = other.cstr_;
+  index_ = other.index_;
+  return *this;
+}
+
+Value::CZString& Value::CZString::operator=(CZString&& other) {
+  cstr_ = other.cstr_;
+  index_ = other.index_;
+  other.cstr_ = nullptr;
   return *this;
 }
 
 bool Value::CZString::operator<(const CZString& other) const {
-  if (cstr_)
-    return strcmp(cstr_, other.cstr_) < 0;
-  return index_ < other.index_;
+  if (!cstr_)
+    return index_ < other.index_;
+  // return strcmp(cstr_, other.cstr_) < 0;
+  // Assume both are strings.
+  unsigned this_len = this->storage_.length_;
+  unsigned other_len = other.storage_.length_;
+  unsigned min_len = std::min<unsigned>(this_len, other_len);
+  JSON_ASSERT(this->cstr_ && other.cstr_);
+  int comp = memcmp(this->cstr_, other.cstr_, min_len);
+  if (comp < 0)
+    return true;
+  if (comp > 0)
+    return false;
+  return (this_len < other_len);
 }
 
 bool Value::CZString::operator==(const CZString& other) const {
-  if (cstr_)
-    return strcmp(cstr_, other.cstr_) == 0;
-  return index_ == other.index_;
+  if (!cstr_)
+    return index_ == other.index_;
+  // return strcmp(cstr_, other.cstr_) == 0;
+  // Assume both are strings.
+  unsigned this_len = this->storage_.length_;
+  unsigned other_len = other.storage_.length_;
+  if (this_len != other_len)
+    return false;
+  JSON_ASSERT(this->cstr_ && other.cstr_);
+  int comp = memcmp(this->cstr_, other.cstr_, this_len);
+  return comp == 0;
 }
 
 ArrayIndex Value::CZString::index() const { return index_; }
 
-const char* Value::CZString::c_str() const { return cstr_; }
-
-bool Value::CZString::isStaticString() const { return index_ == noDuplication; }
-
-#endif // ifndef JSON_VALUE_USE_INTERNAL_MAP
+// const char* Value::CZString::c_str() const { return cstr_; }
+const char* Value::CZString::data() const { return cstr_; }
+unsigned Value::CZString::length() const { return storage_.length_; }
+bool Value::CZString::isStaticString() const {
+  return storage_.policy_ == noDuplication;
+}
 
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
@@ -227,6 +345,7 @@
  * This optimization is used in ValueInternalMap fast allocator.
  */
 Value::Value(ValueType type) {
+  static char const emptyString[] = "";
   initBasic(type);
   switch (type) {
   case nullValue:
@@ -239,21 +358,13 @@
     value_.real_ = 0.0;
     break;
   case stringValue:
-    value_.string_ = 0;
+    // allocated_ == false, so this is safe.
+    value_.string_ = const_cast<char*>(static_cast<char const*>(emptyString));
     break;
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue:
   case objectValue:
     value_.map_ = new ObjectValues();
     break;
-#else
-  case arrayValue:
-    value_.array_ = arrayAllocator()->newArray();
-    break;
-  case objectValue:
-    value_.map_ = mapAllocator()->newMap();
-    break;
-#endif
   case booleanValue:
     value_.bool_ = false;
     break;
@@ -289,19 +400,22 @@
 
 Value::Value(const char* value) {
   initBasic(stringValue, true);
-  value_.string_ = duplicateStringValue(value);
+  JSON_ASSERT_MESSAGE(value != nullptr,
+                      "Null Value Passed to Value Constructor");
+  value_.string_ = duplicateAndPrefixStringValue(
+      value, static_cast<unsigned>(strlen(value)));
 }
 
-Value::Value(const char* beginValue, const char* endValue) {
+Value::Value(const char* begin, const char* end) {
   initBasic(stringValue, true);
   value_.string_ =
-      duplicateStringValue(beginValue, (unsigned int)(endValue - beginValue));
+      duplicateAndPrefixStringValue(begin, static_cast<unsigned>(end - begin));
 }
 
-Value::Value(const std::string& value) {
+Value::Value(const String& value) {
   initBasic(stringValue, true);
-  value_.string_ =
-      duplicateStringValue(value.c_str(), (unsigned int)value.length());
+  value_.string_ = duplicateAndPrefixStringValue(
+      value.data(), static_cast<unsigned>(value.length()));
 }
 
 Value::Value(const StaticString& value) {
@@ -309,120 +423,61 @@
   value_.string_ = const_cast<char*>(value.c_str());
 }
 
-#ifdef JSON_USE_CPPTL
-Value::Value(const CppTL::ConstString& value) {
-  initBasic(stringValue, true);
-  value_.string_ = duplicateStringValue(value, value.length());
-}
-#endif
-
 Value::Value(bool value) {
   initBasic(booleanValue);
   value_.bool_ = value;
 }
 
-Value::Value(const Value& other)
-    : type_(other.type_), allocated_(false)
-#ifdef JSON_VALUE_USE_INTERNAL_MAP
-      ,
-      itemIsUsed_(0)
-#endif
-      ,
-      comments_(0), start_(other.start_), limit_(other.limit_) {
-  switch (type_) {
-  case nullValue:
-  case intValue:
-  case uintValue:
-  case realValue:
-  case booleanValue:
-    value_ = other.value_;
-    break;
-  case stringValue:
-    if (other.value_.string_) {
-      value_.string_ = duplicateStringValue(other.value_.string_);
-      allocated_ = true;
-    } else {
-      value_.string_ = 0;
-      allocated_ = false;
-    }
-    break;
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  case arrayValue:
-  case objectValue:
-    value_.map_ = new ObjectValues(*other.value_.map_);
-    break;
-#else
-  case arrayValue:
-    value_.array_ = arrayAllocator()->newArrayCopy(*other.value_.array_);
-    break;
-  case objectValue:
-    value_.map_ = mapAllocator()->newMapCopy(*other.value_.map_);
-    break;
-#endif
-  default:
-    JSON_ASSERT_UNREACHABLE;
-  }
-  if (other.comments_) {
-    comments_ = new CommentInfo[numberOfCommentPlacement];
-    for (int comment = 0; comment < numberOfCommentPlacement; ++comment) {
-      const CommentInfo& otherComment = other.comments_[comment];
-      if (otherComment.comment_)
-        comments_[comment].setComment(otherComment.comment_);
-    }
-  }
+Value::Value(const Value& other) {
+  dupPayload(other);
+  dupMeta(other);
+}
+
+Value::Value(Value&& other) {
+  initBasic(nullValue);
+  swap(other);
 }
 
 Value::~Value() {
-  switch (type_) {
-  case nullValue:
-  case intValue:
-  case uintValue:
-  case realValue:
-  case booleanValue:
-    break;
-  case stringValue:
-    if (allocated_)
-      releaseStringValue(value_.string_);
-    break;
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  case arrayValue:
-  case objectValue:
-    delete value_.map_;
-    break;
-#else
-  case arrayValue:
-    arrayAllocator()->destructArray(value_.array_);
-    break;
-  case objectValue:
-    mapAllocator()->destructMap(value_.map_);
-    break;
-#endif
-  default:
-    JSON_ASSERT_UNREACHABLE;
-  }
-
-  if (comments_)
-    delete[] comments_;
+  releasePayload();
+  value_.uint_ = 0;
 }
 
-Value& Value::operator=(Value other) {
-  swap(other);
+Value& Value::operator=(const Value& other) {
+  Value(other).swap(*this);
   return *this;
 }
 
-void Value::swap(Value& other) {
-  ValueType temp = type_;
-  type_ = other.type_;
-  other.type_ = temp;
+Value& Value::operator=(Value&& other) {
+  other.swap(*this);
+  return *this;
+}
+
+void Value::swapPayload(Value& other) {
+  std::swap(bits_, other.bits_);
   std::swap(value_, other.value_);
-  int temp2 = allocated_;
-  allocated_ = other.allocated_;
-  other.allocated_ = temp2;
+}
+
+void Value::copyPayload(const Value& other) {
+  releasePayload();
+  dupPayload(other);
+}
+
+void Value::swap(Value& other) {
+  swapPayload(other);
+  std::swap(comments_, other.comments_);
   std::swap(start_, other.start_);
   std::swap(limit_, other.limit_);
 }
 
-ValueType Value::type() const { return type_; }
+void Value::copy(const Value& other) {
+  copyPayload(other);
+  dupMeta(other);
+}
+
+ValueType Value::type() const {
+  return static_cast<ValueType>(bits_.value_type_);
+}
 
 int Value::compare(const Value& other) const {
   if (*this < other)
@@ -433,10 +488,10 @@
 }
 
 bool Value::operator<(const Value& other) const {
-  int typeDelta = type_ - other.type_;
+  int typeDelta = type() - other.type();
   if (typeDelta)
-    return typeDelta < 0 ? true : false;
-  switch (type_) {
+    return typeDelta < 0;
+  switch (type()) {
   case nullValue:
     return false;
   case intValue:
@@ -447,24 +502,35 @@
     return value_.real_ < other.value_.real_;
   case booleanValue:
     return value_.bool_ < other.value_.bool_;
-  case stringValue:
-    return (value_.string_ == 0 && other.value_.string_) ||
-           (other.value_.string_ && value_.string_ &&
-            strcmp(value_.string_, other.value_.string_) < 0);
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
+  case stringValue: {
+    if ((value_.string_ == nullptr) || (other.value_.string_ == nullptr)) {
+      return other.value_.string_ != nullptr;
+    }
+    unsigned this_len;
+    unsigned other_len;
+    char const* this_str;
+    char const* other_str;
+    decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                         &this_str);
+    decodePrefixedString(other.isAllocated(), other.value_.string_, &other_len,
+                         &other_str);
+    unsigned min_len = std::min<unsigned>(this_len, other_len);
+    JSON_ASSERT(this_str && other_str);
+    int comp = memcmp(this_str, other_str, min_len);
+    if (comp < 0)
+      return true;
+    if (comp > 0)
+      return false;
+    return (this_len < other_len);
+  }
   case arrayValue:
   case objectValue: {
-    int delta = int(value_.map_->size() - other.value_.map_->size());
-    if (delta)
-      return delta < 0;
+    auto thisSize = value_.map_->size();
+    auto otherSize = other.value_.map_->size();
+    if (thisSize != otherSize)
+      return thisSize < otherSize;
     return (*value_.map_) < (*other.value_.map_);
   }
-#else
-  case arrayValue:
-    return value_.array_->compare(*(other.value_.array_)) < 0;
-  case objectValue:
-    return value_.map_->compare(*(other.value_.map_)) < 0;
-#endif
   default:
     JSON_ASSERT_UNREACHABLE;
   }
@@ -478,14 +544,9 @@
 bool Value::operator>(const Value& other) const { return other < *this; }
 
 bool Value::operator==(const Value& other) const {
-  // if ( type_ != other.type_ )
-  // GCC 2.95.3 says:
-  // attempt to take address of bit-field structure member `Json::Value::type_'
-  // Beats me, but a temp solves the problem.
-  int temp = other.type_;
-  if (type_ != temp)
+  if (type() != other.type())
     return false;
-  switch (type_) {
+  switch (type()) {
   case nullValue:
     return true;
   case intValue:
@@ -496,21 +557,28 @@
     return value_.real_ == other.value_.real_;
   case booleanValue:
     return value_.bool_ == other.value_.bool_;
-  case stringValue:
-    return (value_.string_ == other.value_.string_) ||
-           (other.value_.string_ && value_.string_ &&
-            strcmp(value_.string_, other.value_.string_) == 0);
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
+  case stringValue: {
+    if ((value_.string_ == nullptr) || (other.value_.string_ == nullptr)) {
+      return (value_.string_ == other.value_.string_);
+    }
+    unsigned this_len;
+    unsigned other_len;
+    char const* this_str;
+    char const* other_str;
+    decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                         &this_str);
+    decodePrefixedString(other.isAllocated(), other.value_.string_, &other_len,
+                         &other_str);
+    if (this_len != other_len)
+      return false;
+    JSON_ASSERT(this_str && other_str);
+    int comp = memcmp(this_str, other_str, this_len);
+    return comp == 0;
+  }
   case arrayValue:
   case objectValue:
     return value_.map_->size() == other.value_.map_->size() &&
            (*value_.map_) == (*other.value_.map_);
-#else
-  case arrayValue:
-    return value_.array_->compare(*(other.value_.array_)) == 0;
-  case objectValue:
-    return value_.map_->compare(*(other.value_.map_)) == 0;
-#endif
   default:
     JSON_ASSERT_UNREACHABLE;
   }
@@ -520,17 +588,56 @@
 bool Value::operator!=(const Value& other) const { return !(*this == other); }
 
 const char* Value::asCString() const {
-  JSON_ASSERT_MESSAGE(type_ == stringValue,
+  JSON_ASSERT_MESSAGE(type() == stringValue,
                       "in Json::Value::asCString(): requires stringValue");
-  return value_.string_;
+  if (value_.string_ == nullptr)
+    return nullptr;
+  unsigned this_len;
+  char const* this_str;
+  decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                       &this_str);
+  return this_str;
 }
 
-std::string Value::asString() const {
-  switch (type_) {
+#if JSONCPP_USING_SECURE_MEMORY
+unsigned Value::getCStringLength() const {
+  JSON_ASSERT_MESSAGE(type() == stringValue,
+                      "in Json::Value::asCString(): requires stringValue");
+  if (value_.string_ == 0)
+    return 0;
+  unsigned this_len;
+  char const* this_str;
+  decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                       &this_str);
+  return this_len;
+}
+#endif
+
+bool Value::getString(char const** begin, char const** end) const {
+  if (type() != stringValue)
+    return false;
+  if (value_.string_ == nullptr)
+    return false;
+  unsigned length;
+  decodePrefixedString(this->isAllocated(), this->value_.string_, &length,
+                       begin);
+  *end = *begin + length;
+  return true;
+}
+
+String Value::asString() const {
+  switch (type()) {
   case nullValue:
     return "";
-  case stringValue:
-    return value_.string_ ? value_.string_ : "";
+  case stringValue: {
+    if (value_.string_ == nullptr)
+      return "";
+    unsigned this_len;
+    char const* this_str;
+    decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                         &this_str);
+    return String(this_str, this_len);
+  }
   case booleanValue:
     return value_.bool_ ? "true" : "false";
   case intValue:
@@ -544,14 +651,8 @@
   }
 }
 
-#ifdef JSON_USE_CPPTL
-CppTL::ConstString Value::asConstString() const {
-  return CppTL::ConstString(asString().c_str());
-}
-#endif
-
 Value::Int Value::asInt() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
     JSON_ASSERT_MESSAGE(isInt(), "LargestInt out of Int range");
     return Int(value_.int_);
@@ -573,7 +674,7 @@
 }
 
 Value::UInt Value::asUInt() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
     JSON_ASSERT_MESSAGE(isUInt(), "LargestInt out of UInt range");
     return UInt(value_.int_);
@@ -597,7 +698,7 @@
 #if defined(JSON_HAS_INT64)
 
 Value::Int64 Value::asInt64() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
     return Int64(value_.int_);
   case uintValue:
@@ -618,7 +719,7 @@
 }
 
 Value::UInt64 Value::asUInt64() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
     JSON_ASSERT_MESSAGE(isUInt64(), "LargestInt out of UInt64 range");
     return UInt64(value_.int_);
@@ -656,7 +757,7 @@
 }
 
 double Value::asDouble() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
     return static_cast<double>(value_.int_);
   case uintValue:
@@ -678,21 +779,22 @@
 }
 
 float Value::asFloat() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
     return static_cast<float>(value_.int_);
   case uintValue:
 #if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
     return static_cast<float>(value_.uint_);
 #else  // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
-    return integerToDouble(value_.uint_);
+    // This can fail (silently?) if the value is bigger than MAX_FLOAT.
+    return static_cast<float>(integerToDouble(value_.uint_));
 #endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
   case realValue:
     return static_cast<float>(value_.real_);
   case nullValue:
     return 0.0;
   case booleanValue:
-    return value_.bool_ ? 1.0f : 0.0f;
+    return value_.bool_ ? 1.0F : 0.0F;
   default:
     break;
   }
@@ -700,17 +802,20 @@
 }
 
 bool Value::asBool() const {
-  switch (type_) {
+  switch (type()) {
   case booleanValue:
     return value_.bool_;
   case nullValue:
     return false;
   case intValue:
-    return value_.int_ ? true : false;
+    return value_.int_ != 0;
   case uintValue:
-    return value_.uint_ ? true : false;
-  case realValue:
-    return value_.real_ ? true : false;
+    return value_.uint_ != 0;
+  case realValue: {
+    // According to JavaScript language zero or NaN is regarded as false
+    const auto value_classification = std::fpclassify(value_.real_);
+    return value_classification != FP_ZERO && value_classification != FP_NAN;
+  }
   default:
     break;
   }
@@ -721,30 +826,30 @@
   switch (other) {
   case nullValue:
     return (isNumeric() && asDouble() == 0.0) ||
-           (type_ == booleanValue && value_.bool_ == false) ||
-           (type_ == stringValue && asString() == "") ||
-           (type_ == arrayValue && value_.map_->size() == 0) ||
-           (type_ == objectValue && value_.map_->size() == 0) ||
-           type_ == nullValue;
+           (type() == booleanValue && !value_.bool_) ||
+           (type() == stringValue && asString().empty()) ||
+           (type() == arrayValue && value_.map_->empty()) ||
+           (type() == objectValue && value_.map_->empty()) ||
+           type() == nullValue;
   case intValue:
     return isInt() ||
-           (type_ == realValue && InRange(value_.real_, minInt, maxInt)) ||
-           type_ == booleanValue || type_ == nullValue;
+           (type() == realValue && InRange(value_.real_, minInt, maxInt)) ||
+           type() == booleanValue || type() == nullValue;
   case uintValue:
     return isUInt() ||
-           (type_ == realValue && InRange(value_.real_, 0, maxUInt)) ||
-           type_ == booleanValue || type_ == nullValue;
+           (type() == realValue && InRange(value_.real_, 0, maxUInt)) ||
+           type() == booleanValue || type() == nullValue;
   case realValue:
-    return isNumeric() || type_ == booleanValue || type_ == nullValue;
+    return isNumeric() || type() == booleanValue || type() == nullValue;
   case booleanValue:
-    return isNumeric() || type_ == booleanValue || type_ == nullValue;
+    return isNumeric() || type() == booleanValue || type() == nullValue;
   case stringValue:
-    return isNumeric() || type_ == booleanValue || type_ == stringValue ||
-           type_ == nullValue;
+    return isNumeric() || type() == booleanValue || type() == stringValue ||
+           type() == nullValue;
   case arrayValue:
-    return type_ == arrayValue || type_ == nullValue;
+    return type() == arrayValue || type() == nullValue;
   case objectValue:
-    return type_ == objectValue || type_ == nullValue;
+    return type() == objectValue || type() == nullValue;
   }
   JSON_ASSERT_UNREACHABLE;
   return false;
@@ -752,7 +857,7 @@
 
 /// Number of values in array or object
 ArrayIndex Value::size() const {
-  switch (type_) {
+  switch (type()) {
   case nullValue:
   case intValue:
   case uintValue:
@@ -760,7 +865,6 @@
   case booleanValue:
   case stringValue:
     return 0;
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   case arrayValue: // size of the array is highest index + 1
     if (!value_.map_->empty()) {
       ObjectValues::const_iterator itLast = value_.map_->end();
@@ -770,12 +874,6 @@
     return 0;
   case objectValue:
     return ArrayIndex(value_.map_->size());
-#else
-  case arrayValue:
-    return Int(value_.array_->size());
-  case objectValue:
-    return Int(value_.map_->size());
-#endif
   }
   JSON_ASSERT_UNREACHABLE;
   return 0; // unreachable;
@@ -783,78 +881,60 @@
 
 bool Value::empty() const {
   if (isNull() || isArray() || isObject())
-    return size() == 0u;
-  else
-    return false;
+    return size() == 0U;
+  return false;
 }
 
-bool Value::operator!() const { return isNull(); }
+Value::operator bool() const { return !isNull(); }
 
 void Value::clear() {
-  JSON_ASSERT_MESSAGE(type_ == nullValue || type_ == arrayValue ||
-                          type_ == objectValue,
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue ||
+                          type() == objectValue,
                       "in Json::Value::clear(): requires complex value");
   start_ = 0;
   limit_ = 0;
-  switch (type_) {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
+  switch (type()) {
   case arrayValue:
   case objectValue:
     value_.map_->clear();
     break;
-#else
-  case arrayValue:
-    value_.array_->clear();
-    break;
-  case objectValue:
-    value_.map_->clear();
-    break;
-#endif
   default:
     break;
   }
 }
 
 void Value::resize(ArrayIndex newSize) {
-  JSON_ASSERT_MESSAGE(type_ == nullValue || type_ == arrayValue,
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue,
                       "in Json::Value::resize(): requires arrayValue");
-  if (type_ == nullValue)
+  if (type() == nullValue)
     *this = Value(arrayValue);
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   ArrayIndex oldSize = size();
   if (newSize == 0)
     clear();
   else if (newSize > oldSize)
-    (*this)[newSize - 1];
+    this->operator[](newSize - 1);
   else {
     for (ArrayIndex index = newSize; index < oldSize; ++index) {
       value_.map_->erase(index);
     }
-    assert(size() == newSize);
+    JSON_ASSERT(size() == newSize);
   }
-#else
-  value_.array_->resize(newSize);
-#endif
 }
 
 Value& Value::operator[](ArrayIndex index) {
   JSON_ASSERT_MESSAGE(
-      type_ == nullValue || type_ == arrayValue,
+      type() == nullValue || type() == arrayValue,
       "in Json::Value::operator[](ArrayIndex): requires arrayValue");
-  if (type_ == nullValue)
+  if (type() == nullValue)
     *this = Value(arrayValue);
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   CZString key(index);
-  ObjectValues::iterator it = value_.map_->lower_bound(key);
+  auto it = value_.map_->lower_bound(key);
   if (it != value_.map_->end() && (*it).first == key)
     return (*it).second;
 
-  ObjectValues::value_type defaultValue(key, null);
+  ObjectValues::value_type defaultValue(key, nullSingleton());
   it = value_.map_->insert(it, defaultValue);
   return (*it).second;
-#else
-  return value_.array_->resolveReference(index);
-#endif
 }
 
 Value& Value::operator[](int index) {
@@ -866,20 +946,15 @@
 
 const Value& Value::operator[](ArrayIndex index) const {
   JSON_ASSERT_MESSAGE(
-      type_ == nullValue || type_ == arrayValue,
+      type() == nullValue || type() == arrayValue,
       "in Json::Value::operator[](ArrayIndex)const: requires arrayValue");
-  if (type_ == nullValue)
-    return null;
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
+  if (type() == nullValue)
+    return nullSingleton();
   CZString key(index);
   ObjectValues::const_iterator it = value_.map_->find(key);
   if (it == value_.map_->end())
-    return null;
+    return nullSingleton();
   return (*it).second;
-#else
-  Value* value = value_.array_->find(index);
-  return value ? *value : null;
-#endif
 }
 
 const Value& Value::operator[](int index) const {
@@ -889,214 +964,304 @@
   return (*this)[ArrayIndex(index)];
 }
 
-Value& Value::operator[](const char* key) {
-  return resolveReference(key, false);
-}
-
 void Value::initBasic(ValueType type, bool allocated) {
-  type_ = type;
-  allocated_ = allocated;
-#ifdef JSON_VALUE_USE_INTERNAL_MAP
-  itemIsUsed_ = 0;
-#endif
-  comments_ = 0;
+  setType(type);
+  setIsAllocated(allocated);
+  comments_ = Comments{};
   start_ = 0;
   limit_ = 0;
 }
 
-Value& Value::resolveReference(const char* key, bool isStatic) {
+void Value::dupPayload(const Value& other) {
+  setType(other.type());
+  setIsAllocated(false);
+  switch (type()) {
+  case nullValue:
+  case intValue:
+  case uintValue:
+  case realValue:
+  case booleanValue:
+    value_ = other.value_;
+    break;
+  case stringValue:
+    if (other.value_.string_ && other.isAllocated()) {
+      unsigned len;
+      char const* str;
+      decodePrefixedString(other.isAllocated(), other.value_.string_, &len,
+                           &str);
+      value_.string_ = duplicateAndPrefixStringValue(str, len);
+      setIsAllocated(true);
+    } else {
+      value_.string_ = other.value_.string_;
+    }
+    break;
+  case arrayValue:
+  case objectValue:
+    value_.map_ = new ObjectValues(*other.value_.map_);
+    break;
+  default:
+    JSON_ASSERT_UNREACHABLE;
+  }
+}
+
+void Value::releasePayload() {
+  switch (type()) {
+  case nullValue:
+  case intValue:
+  case uintValue:
+  case realValue:
+  case booleanValue:
+    break;
+  case stringValue:
+    if (isAllocated())
+      releasePrefixedStringValue(value_.string_);
+    break;
+  case arrayValue:
+  case objectValue:
+    delete value_.map_;
+    break;
+  default:
+    JSON_ASSERT_UNREACHABLE;
+  }
+}
+
+void Value::dupMeta(const Value& other) {
+  comments_ = other.comments_;
+  start_ = other.start_;
+  limit_ = other.limit_;
+}
+
+// Access an object value by name, create a null member if it does not exist.
+// @pre Type of '*this' is object or null.
+// @param key is null-terminated.
+Value& Value::resolveReference(const char* key) {
   JSON_ASSERT_MESSAGE(
-      type_ == nullValue || type_ == objectValue,
+      type() == nullValue || type() == objectValue,
       "in Json::Value::resolveReference(): requires objectValue");
-  if (type_ == nullValue)
+  if (type() == nullValue)
     *this = Value(objectValue);
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  CZString actualKey(
-      key, isStatic ? CZString::noDuplication : CZString::duplicateOnCopy);
-  ObjectValues::iterator it = value_.map_->lower_bound(actualKey);
+  CZString actualKey(key, static_cast<unsigned>(strlen(key)),
+                     CZString::noDuplication); // NOTE!
+  auto it = value_.map_->lower_bound(actualKey);
   if (it != value_.map_->end() && (*it).first == actualKey)
     return (*it).second;
 
-  ObjectValues::value_type defaultValue(actualKey, null);
+  ObjectValues::value_type defaultValue(actualKey, nullSingleton());
   it = value_.map_->insert(it, defaultValue);
   Value& value = (*it).second;
   return value;
-#else
-  return value_.map_->resolveReference(key, isStatic);
-#endif
+}
+
+// @param key is not null-terminated.
+Value& Value::resolveReference(char const* key, char const* end) {
+  JSON_ASSERT_MESSAGE(
+      type() == nullValue || type() == objectValue,
+      "in Json::Value::resolveReference(key, end): requires objectValue");
+  if (type() == nullValue)
+    *this = Value(objectValue);
+  CZString actualKey(key, static_cast<unsigned>(end - key),
+                     CZString::duplicateOnCopy);
+  auto it = value_.map_->lower_bound(actualKey);
+  if (it != value_.map_->end() && (*it).first == actualKey)
+    return (*it).second;
+
+  ObjectValues::value_type defaultValue(actualKey, nullSingleton());
+  it = value_.map_->insert(it, defaultValue);
+  Value& value = (*it).second;
+  return value;
 }
 
 Value Value::get(ArrayIndex index, const Value& defaultValue) const {
   const Value* value = &((*this)[index]);
-  return value == &null ? defaultValue : *value;
+  return value == &nullSingleton() ? defaultValue : *value;
 }
 
 bool Value::isValidIndex(ArrayIndex index) const { return index < size(); }
 
-const Value& Value::operator[](const char* key) const {
-  JSON_ASSERT_MESSAGE(
-      type_ == nullValue || type_ == objectValue,
-      "in Json::Value::operator[](char const*)const: requires objectValue");
-  if (type_ == nullValue)
-    return null;
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  CZString actualKey(key, CZString::noDuplication);
+Value const* Value::find(char const* begin, char const* end) const {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue,
+                      "in Json::Value::find(begin, end): requires "
+                      "objectValue or nullValue");
+  if (type() == nullValue)
+    return nullptr;
+  CZString actualKey(begin, static_cast<unsigned>(end - begin),
+                     CZString::noDuplication);
   ObjectValues::const_iterator it = value_.map_->find(actualKey);
   if (it == value_.map_->end())
-    return null;
-  return (*it).second;
-#else
-  const Value* value = value_.map_->find(key);
-  return value ? *value : null;
-#endif
+    return nullptr;
+  return &(*it).second;
+}
+Value* Value::demand(char const* begin, char const* end) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue,
+                      "in Json::Value::demand(begin, end): requires "
+                      "objectValue or nullValue");
+  return &resolveReference(begin, end);
+}
+const Value& Value::operator[](const char* key) const {
+  Value const* found = find(key, key + strlen(key));
+  if (!found)
+    return nullSingleton();
+  return *found;
+}
+Value const& Value::operator[](const String& key) const {
+  Value const* found = find(key.data(), key.data() + key.length());
+  if (!found)
+    return nullSingleton();
+  return *found;
 }
 
-Value& Value::operator[](const std::string& key) {
-  return (*this)[key.c_str()];
+Value& Value::operator[](const char* key) {
+  return resolveReference(key, key + strlen(key));
 }
 
-const Value& Value::operator[](const std::string& key) const {
-  return (*this)[key.c_str()];
+Value& Value::operator[](const String& key) {
+  return resolveReference(key.data(), key.data() + key.length());
 }
 
 Value& Value::operator[](const StaticString& key) {
-  return resolveReference(key, true);
+  return resolveReference(key.c_str());
 }
 
-#ifdef JSON_USE_CPPTL
-Value& Value::operator[](const CppTL::ConstString& key) {
-  return (*this)[key.c_str()];
-}
+Value& Value::append(const Value& value) { return append(Value(value)); }
 
-const Value& Value::operator[](const CppTL::ConstString& key) const {
-  return (*this)[key.c_str()];
-}
-#endif
-
-Value& Value::append(const Value& value) { return (*this)[size()] = value; }
-
-Value Value::get(const char* key, const Value& defaultValue) const {
-  const Value* value = &((*this)[key]);
-  return value == &null ? defaultValue : *value;
-}
-
-Value Value::get(const std::string& key, const Value& defaultValue) const {
-  return get(key.c_str(), defaultValue);
-}
-
-Value Value::removeMember(const char* key) {
-  JSON_ASSERT_MESSAGE(type_ == nullValue || type_ == objectValue,
-                      "in Json::Value::removeMember(): requires objectValue");
-  if (type_ == nullValue)
-    return null;
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  CZString actualKey(key, CZString::noDuplication);
-  ObjectValues::iterator it = value_.map_->find(actualKey);
-  if (it == value_.map_->end())
-    return null;
-  Value old(it->second);
-  value_.map_->erase(it);
-  return old;
-#else
-  Value* value = value_.map_->find(key);
-  if (value) {
-    Value old(*value);
-    value_.map_.remove(key);
-    return old;
-  } else {
-    return null;
+Value& Value::append(Value&& value) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue,
+                      "in Json::Value::append: requires arrayValue");
+  if (type() == nullValue) {
+    *this = Value(arrayValue);
   }
-#endif
+  return this->value_.map_->emplace(size(), std::move(value)).first->second;
 }
 
-Value Value::removeMember(const std::string& key) {
-  return removeMember(key.c_str());
+bool Value::insert(ArrayIndex index, const Value& newValue) {
+  return insert(index, Value(newValue));
 }
 
-#ifdef JSON_USE_CPPTL
-Value Value::get(const CppTL::ConstString& key,
-                 const Value& defaultValue) const {
-  return get(key.c_str(), defaultValue);
-}
-#endif
-
-bool Value::isMember(const char* key) const {
-  const Value* value = &((*this)[key]);
-  return value != &null;
+bool Value::insert(ArrayIndex index, Value&& newValue) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue,
+                      "in Json::Value::insert: requires arrayValue");
+  ArrayIndex length = size();
+  if (index > length) {
+    return false;
+  }
+  for (ArrayIndex i = length; i > index; i--) {
+    (*this)[i] = std::move((*this)[i - 1]);
+  }
+  (*this)[index] = std::move(newValue);
+  return true;
 }
 
-bool Value::isMember(const std::string& key) const {
-  return isMember(key.c_str());
+Value Value::get(char const* begin, char const* end,
+                 Value const& defaultValue) const {
+  Value const* found = find(begin, end);
+  return !found ? defaultValue : *found;
+}
+Value Value::get(char const* key, Value const& defaultValue) const {
+  return get(key, key + strlen(key), defaultValue);
+}
+Value Value::get(String const& key, Value const& defaultValue) const {
+  return get(key.data(), key.data() + key.length(), defaultValue);
 }
 
-#ifdef JSON_USE_CPPTL
-bool Value::isMember(const CppTL::ConstString& key) const {
-  return isMember(key.c_str());
+bool Value::removeMember(const char* begin, const char* end, Value* removed) {
+  if (type() != objectValue) {
+    return false;
+  }
+  CZString actualKey(begin, static_cast<unsigned>(end - begin),
+                     CZString::noDuplication);
+  auto it = value_.map_->find(actualKey);
+  if (it == value_.map_->end())
+    return false;
+  if (removed)
+    *removed = std::move(it->second);
+  value_.map_->erase(it);
+  return true;
 }
-#endif
+bool Value::removeMember(const char* key, Value* removed) {
+  return removeMember(key, key + strlen(key), removed);
+}
+bool Value::removeMember(String const& key, Value* removed) {
+  return removeMember(key.data(), key.data() + key.length(), removed);
+}
+void Value::removeMember(const char* key) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue,
+                      "in Json::Value::removeMember(): requires objectValue");
+  if (type() == nullValue)
+    return;
+
+  CZString actualKey(key, unsigned(strlen(key)), CZString::noDuplication);
+  value_.map_->erase(actualKey);
+}
+void Value::removeMember(const String& key) { removeMember(key.c_str()); }
+
+bool Value::removeIndex(ArrayIndex index, Value* removed) {
+  if (type() != arrayValue) {
+    return false;
+  }
+  CZString key(index);
+  auto it = value_.map_->find(key);
+  if (it == value_.map_->end()) {
+    return false;
+  }
+  if (removed)
+    *removed = it->second;
+  ArrayIndex oldSize = size();
+  // shift left all items left, into the place of the "removed"
+  for (ArrayIndex i = index; i < (oldSize - 1); ++i) {
+    CZString keey(i);
+    (*value_.map_)[keey] = (*this)[i + 1];
+  }
+  // erase the last one ("leftover")
+  CZString keyLast(oldSize - 1);
+  auto itLast = value_.map_->find(keyLast);
+  value_.map_->erase(itLast);
+  return true;
+}
+
+bool Value::isMember(char const* begin, char const* end) const {
+  Value const* value = find(begin, end);
+  return nullptr != value;
+}
+bool Value::isMember(char const* key) const {
+  return isMember(key, key + strlen(key));
+}
+bool Value::isMember(String const& key) const {
+  return isMember(key.data(), key.data() + key.length());
+}
 
 Value::Members Value::getMemberNames() const {
   JSON_ASSERT_MESSAGE(
-      type_ == nullValue || type_ == objectValue,
+      type() == nullValue || type() == objectValue,
       "in Json::Value::getMemberNames(), value must be objectValue");
-  if (type_ == nullValue)
+  if (type() == nullValue)
     return Value::Members();
   Members members;
   members.reserve(value_.map_->size());
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   ObjectValues::const_iterator it = value_.map_->begin();
   ObjectValues::const_iterator itEnd = value_.map_->end();
-  for (; it != itEnd; ++it)
-    members.push_back(std::string((*it).first.c_str()));
-#else
-  ValueInternalMap::IteratorState it;
-  ValueInternalMap::IteratorState itEnd;
-  value_.map_->makeBeginIterator(it);
-  value_.map_->makeEndIterator(itEnd);
-  for (; !ValueInternalMap::equals(it, itEnd); ValueInternalMap::increment(it))
-    members.push_back(std::string(ValueInternalMap::key(it)));
-#endif
+  for (; it != itEnd; ++it) {
+    members.push_back(String((*it).first.data(), (*it).first.length()));
+  }
   return members;
 }
-//
-//# ifdef JSON_USE_CPPTL
-// EnumMemberNames
-// Value::enumMemberNames() const
-//{
-//   if ( type_ == objectValue )
-//   {
-//      return CppTL::Enum::any(  CppTL::Enum::transform(
-//         CppTL::Enum::keys( *(value_.map_), CppTL::Type<const CZString &>() ),
-//         MemberNamesTransform() ) );
-//   }
-//   return EnumMemberNames();
-//}
-//
-//
-// EnumValues
-// Value::enumValues() const
-//{
-//   if ( type_ == objectValue  ||  type_ == arrayValue )
-//      return CppTL::Enum::anyValues( *(value_.map_),
-//                                     CppTL::Type<const Value &>() );
-//   return EnumValues();
-//}
-//
-//# endif
 
 static bool IsIntegral(double d) {
   double integral_part;
   return modf(d, &integral_part) == 0.0;
 }
 
-bool Value::isNull() const { return type_ == nullValue; }
+bool Value::isNull() const { return type() == nullValue; }
 
-bool Value::isBool() const { return type_ == booleanValue; }
+bool Value::isBool() const { return type() == booleanValue; }
 
 bool Value::isInt() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
+#if defined(JSON_HAS_INT64)
     return value_.int_ >= minInt && value_.int_ <= maxInt;
+#else
+    return true;
+#endif
   case uintValue:
     return value_.uint_ <= UInt(maxInt);
   case realValue:
@@ -1109,11 +1274,19 @@
 }
 
 bool Value::isUInt() const {
-  switch (type_) {
+  switch (type()) {
   case intValue:
+#if defined(JSON_HAS_INT64)
     return value_.int_ >= 0 && LargestUInt(value_.int_) <= LargestUInt(maxUInt);
+#else
+    return value_.int_ >= 0;
+#endif
   case uintValue:
+#if defined(JSON_HAS_INT64)
     return value_.uint_ <= maxUInt;
+#else
+    return true;
+#endif
   case realValue:
     return value_.real_ >= 0 && value_.real_ <= maxUInt &&
            IsIntegral(value_.real_);
@@ -1125,7 +1298,7 @@
 
 bool Value::isInt64() const {
 #if defined(JSON_HAS_INT64)
-  switch (type_) {
+  switch (type()) {
   case intValue:
     return true;
   case uintValue:
@@ -1145,7 +1318,7 @@
 
 bool Value::isUInt64() const {
 #if defined(JSON_HAS_INT64)
-  switch (type_) {
+  switch (type()) {
   case intValue:
     return value_.int_ >= 0;
   case uintValue:
@@ -1164,140 +1337,145 @@
 }
 
 bool Value::isIntegral() const {
+  switch (type()) {
+  case intValue:
+  case uintValue:
+    return true;
+  case realValue:
 #if defined(JSON_HAS_INT64)
-  return isInt64() || isUInt64();
+    // Note that maxUInt64 (= 2^64 - 1) is not exactly representable as a
+    // double, so double(maxUInt64) will be rounded up to 2^64. Therefore we
+    // require the value to be strictly less than the limit.
+    return value_.real_ >= double(minInt64) &&
+           value_.real_ < maxUInt64AsDouble && IsIntegral(value_.real_);
 #else
-  return isInt() || isUInt();
-#endif
+    return value_.real_ >= minInt && value_.real_ <= maxUInt &&
+           IsIntegral(value_.real_);
+#endif // JSON_HAS_INT64
+  default:
+    break;
+  }
+  return false;
 }
 
-bool Value::isDouble() const { return type_ == realValue || isIntegral(); }
-
-bool Value::isNumeric() const { return isIntegral() || isDouble(); }
-
-bool Value::isString() const { return type_ == stringValue; }
-
-bool Value::isArray() const { return type_ == arrayValue; }
-
-bool Value::isObject() const { return type_ == objectValue; }
-
-void Value::setComment(const char* comment, CommentPlacement placement) {
-  if (!comments_)
-    comments_ = new CommentInfo[numberOfCommentPlacement];
-  comments_[placement].setComment(comment);
+bool Value::isDouble() const {
+  return type() == intValue || type() == uintValue || type() == realValue;
 }
 
-void Value::setComment(const std::string& comment, CommentPlacement placement) {
-  setComment(comment.c_str(), placement);
+bool Value::isNumeric() const { return isDouble(); }
+
+bool Value::isString() const { return type() == stringValue; }
+
+bool Value::isArray() const { return type() == arrayValue; }
+
+bool Value::isObject() const { return type() == objectValue; }
+
+Value::Comments::Comments(const Comments& that)
+    : ptr_{cloneUnique(that.ptr_)} {}
+
+Value::Comments::Comments(Comments&& that) : ptr_{std::move(that.ptr_)} {}
+
+Value::Comments& Value::Comments::operator=(const Comments& that) {
+  ptr_ = cloneUnique(that.ptr_);
+  return *this;
+}
+
+Value::Comments& Value::Comments::operator=(Comments&& that) {
+  ptr_ = std::move(that.ptr_);
+  return *this;
+}
+
+bool Value::Comments::has(CommentPlacement slot) const {
+  return ptr_ && !(*ptr_)[slot].empty();
+}
+
+String Value::Comments::get(CommentPlacement slot) const {
+  if (!ptr_)
+    return {};
+  return (*ptr_)[slot];
+}
+
+void Value::Comments::set(CommentPlacement slot, String comment) {
+  if (!ptr_) {
+    ptr_ = std::unique_ptr<Array>(new Array());
+  }
+  // check comments array boundry.
+  if (slot < CommentPlacement::numberOfCommentPlacement) {
+    (*ptr_)[slot] = std::move(comment);
+  }
+}
+
+void Value::setComment(String comment, CommentPlacement placement) {
+  if (!comment.empty() && (comment.back() == '\n')) {
+    // Always discard trailing newline, to aid indentation.
+    comment.pop_back();
+  }
+  JSON_ASSERT(!comment.empty());
+  JSON_ASSERT_MESSAGE(
+      comment[0] == '\0' || comment[0] == '/',
+      "in Json::Value::setComment(): Comments must start with /");
+  comments_.set(placement, std::move(comment));
 }
 
 bool Value::hasComment(CommentPlacement placement) const {
-  return comments_ != 0 && comments_[placement].comment_ != 0;
+  return comments_.has(placement);
 }
 
-std::string Value::getComment(CommentPlacement placement) const {
-  if (hasComment(placement))
-    return comments_[placement].comment_;
-  return "";
+String Value::getComment(CommentPlacement placement) const {
+  return comments_.get(placement);
 }
 
-void Value::setOffsetStart(size_t start) { start_ = start; }
+void Value::setOffsetStart(ptrdiff_t start) { start_ = start; }
 
-void Value::setOffsetLimit(size_t limit) { limit_ = limit; }
+void Value::setOffsetLimit(ptrdiff_t limit) { limit_ = limit; }
 
-size_t Value::getOffsetStart() const { return start_; }
+ptrdiff_t Value::getOffsetStart() const { return start_; }
 
-size_t Value::getOffsetLimit() const { return limit_; }
+ptrdiff_t Value::getOffsetLimit() const { return limit_; }
 
-std::string Value::toStyledString() const {
-  StyledWriter writer;
-  return writer.write(*this);
+String Value::toStyledString() const {
+  StreamWriterBuilder builder;
+
+  String out = this->hasComment(commentBefore) ? "\n" : "";
+  out += Json::writeString(builder, *this);
+  out += '\n';
+
+  return out;
 }
 
 Value::const_iterator Value::begin() const {
-  switch (type_) {
-#ifdef JSON_VALUE_USE_INTERNAL_MAP
-  case arrayValue:
-    if (value_.array_) {
-      ValueInternalArray::IteratorState it;
-      value_.array_->makeBeginIterator(it);
-      return const_iterator(it);
-    }
-    break;
-  case objectValue:
-    if (value_.map_) {
-      ValueInternalMap::IteratorState it;
-      value_.map_->makeBeginIterator(it);
-      return const_iterator(it);
-    }
-    break;
-#else
+  switch (type()) {
   case arrayValue:
   case objectValue:
     if (value_.map_)
       return const_iterator(value_.map_->begin());
     break;
-#endif
   default:
     break;
   }
-  return const_iterator();
+  return {};
 }
 
 Value::const_iterator Value::end() const {
-  switch (type_) {
-#ifdef JSON_VALUE_USE_INTERNAL_MAP
-  case arrayValue:
-    if (value_.array_) {
-      ValueInternalArray::IteratorState it;
-      value_.array_->makeEndIterator(it);
-      return const_iterator(it);
-    }
-    break;
-  case objectValue:
-    if (value_.map_) {
-      ValueInternalMap::IteratorState it;
-      value_.map_->makeEndIterator(it);
-      return const_iterator(it);
-    }
-    break;
-#else
+  switch (type()) {
   case arrayValue:
   case objectValue:
     if (value_.map_)
       return const_iterator(value_.map_->end());
     break;
-#endif
   default:
     break;
   }
-  return const_iterator();
+  return {};
 }
 
 Value::iterator Value::begin() {
-  switch (type_) {
-#ifdef JSON_VALUE_USE_INTERNAL_MAP
-  case arrayValue:
-    if (value_.array_) {
-      ValueInternalArray::IteratorState it;
-      value_.array_->makeBeginIterator(it);
-      return iterator(it);
-    }
-    break;
-  case objectValue:
-    if (value_.map_) {
-      ValueInternalMap::IteratorState it;
-      value_.map_->makeBeginIterator(it);
-      return iterator(it);
-    }
-    break;
-#else
+  switch (type()) {
   case arrayValue:
   case objectValue:
     if (value_.map_)
       return iterator(value_.map_->begin());
     break;
-#endif
   default:
     break;
   }
@@ -1305,29 +1483,12 @@
 }
 
 Value::iterator Value::end() {
-  switch (type_) {
-#ifdef JSON_VALUE_USE_INTERNAL_MAP
-  case arrayValue:
-    if (value_.array_) {
-      ValueInternalArray::IteratorState it;
-      value_.array_->makeEndIterator(it);
-      return iterator(it);
-    }
-    break;
-  case objectValue:
-    if (value_.map_) {
-      ValueInternalMap::IteratorState it;
-      value_.map_->makeEndIterator(it);
-      return iterator(it);
-    }
-    break;
-#else
+  switch (type()) {
   case arrayValue:
   case objectValue:
     if (value_.map_)
       return iterator(value_.map_->end());
     break;
-#endif
   default:
     break;
   }
@@ -1337,27 +1498,23 @@
 // class PathArgument
 // //////////////////////////////////////////////////////////////////
 
-PathArgument::PathArgument() : key_(), index_(), kind_(kindNone) {}
+PathArgument::PathArgument() = default;
 
 PathArgument::PathArgument(ArrayIndex index)
-    : key_(), index_(index), kind_(kindIndex) {}
+    : index_(index), kind_(kindIndex) {}
 
-PathArgument::PathArgument(const char* key)
-    : key_(key), index_(), kind_(kindKey) {}
+PathArgument::PathArgument(const char* key) : key_(key), kind_(kindKey) {}
 
-PathArgument::PathArgument(const std::string& key)
-    : key_(key.c_str()), index_(), kind_(kindKey) {}
+PathArgument::PathArgument(String key) : key_(std::move(key)), kind_(kindKey) {}
 
 // class Path
 // //////////////////////////////////////////////////////////////////
 
-Path::Path(const std::string& path,
-           const PathArgument& a1,
-           const PathArgument& a2,
-           const PathArgument& a3,
-           const PathArgument& a4,
+Path::Path(const String& path, const PathArgument& a1, const PathArgument& a2,
+           const PathArgument& a3, const PathArgument& a4,
            const PathArgument& a5) {
   InArgs in;
+  in.reserve(5);
   in.push_back(&a1);
   in.push_back(&a2);
   in.push_back(&a3);
@@ -1366,10 +1523,10 @@
   makePath(path, in);
 }
 
-void Path::makePath(const std::string& path, const InArgs& in) {
+void Path::makePath(const String& path, const InArgs& in) {
   const char* current = path.c_str();
   const char* end = current + path.length();
-  InArgs::const_iterator itInArg = in.begin();
+  auto itInArg = in.begin();
   while (current != end) {
     if (*current == '[') {
       ++current;
@@ -1381,24 +1538,23 @@
           index = index * 10 + ArrayIndex(*current - '0');
         args_.push_back(index);
       }
-      if (current == end || *current++ != ']')
+      if (current == end || *++current != ']')
         invalidPath(path, int(current - path.c_str()));
     } else if (*current == '%') {
       addPathInArg(path, in, itInArg, PathArgument::kindKey);
       ++current;
-    } else if (*current == '.') {
+    } else if (*current == '.' || *current == ']') {
       ++current;
     } else {
       const char* beginName = current;
       while (current != end && !strchr("[.", *current))
         ++current;
-      args_.push_back(std::string(beginName, current));
+      args_.push_back(String(beginName, current));
     }
   }
 }
 
-void Path::addPathInArg(const std::string& /*path*/,
-                        const InArgs& in,
+void Path::addPathInArg(const String& /*path*/, const InArgs& in,
                         InArgs::const_iterator& itInArg,
                         PathArgument::Kind kind) {
   if (itInArg == in.end()) {
@@ -1406,31 +1562,33 @@
   } else if ((*itInArg)->kind_ != kind) {
     // Error: bad argument type
   } else {
-    args_.push_back(**itInArg);
+    args_.push_back(**itInArg++);
   }
 }
 
-void Path::invalidPath(const std::string& /*path*/, int /*location*/) {
+void Path::invalidPath(const String& /*path*/, int /*location*/) {
   // Error: invalid path.
 }
 
 const Value& Path::resolve(const Value& root) const {
   const Value* node = &root;
-  for (Args::const_iterator it = args_.begin(); it != args_.end(); ++it) {
-    const PathArgument& arg = *it;
+  for (const auto& arg : args_) {
     if (arg.kind_ == PathArgument::kindIndex) {
       if (!node->isArray() || !node->isValidIndex(arg.index_)) {
-        // Error: unable to resolve path (array value expected at position...
+        // Error: unable to resolve path (array value expected at position... )
+        return Value::nullSingleton();
       }
       node = &((*node)[arg.index_]);
     } else if (arg.kind_ == PathArgument::kindKey) {
       if (!node->isObject()) {
         // Error: unable to resolve path (object value expected at position...)
+        return Value::nullSingleton();
       }
       node = &((*node)[arg.key_]);
-      if (node == &Value::null) {
+      if (node == &Value::nullSingleton()) {
         // Error: unable to resolve path (object has no member named '' at
         // position...)
+        return Value::nullSingleton();
       }
     }
   }
@@ -1439,8 +1597,7 @@
 
 Value Path::resolve(const Value& root, const Value& defaultValue) const {
   const Value* node = &root;
-  for (Args::const_iterator it = args_.begin(); it != args_.end(); ++it) {
-    const PathArgument& arg = *it;
+  for (const auto& arg : args_) {
     if (arg.kind_ == PathArgument::kindIndex) {
       if (!node->isArray() || !node->isValidIndex(arg.index_))
         return defaultValue;
@@ -1449,7 +1606,7 @@
       if (!node->isObject())
         return defaultValue;
       node = &((*node)[arg.key_]);
-      if (node == &Value::null)
+      if (node == &Value::nullSingleton())
         return defaultValue;
     }
   }
@@ -1458,8 +1615,7 @@
 
 Value& Path::make(Value& root) const {
   Value* node = &root;
-  for (Args::const_iterator it = args_.begin(); it != args_.end(); ++it) {
-    const PathArgument& arg = *it;
+  for (const auto& arg : args_) {
     if (arg.kind_ == PathArgument::kindIndex) {
       if (!node->isArray()) {
         // Error: node is not an array at position ...
diff --git a/src/lib_json/json_valueiterator.inl b/src/lib_json/json_valueiterator.inl
index a9f7df6..d6128b8 100644
--- a/src/lib_json/json_valueiterator.inl
+++ b/src/lib_json/json_valueiterator.inl
@@ -1,4 +1,4 @@
-// Copyright 2007-2010 Baptiste Lepilleur
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
@@ -15,70 +15,21 @@
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
 
-ValueIteratorBase::ValueIteratorBase()
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-    : current_(), isNull_(true) {
-}
-#else
-    : isArray_(true), isNull_(true) {
-  iterator_.array_ = ValueInternalArray::IteratorState();
-}
-#endif
+ValueIteratorBase::ValueIteratorBase() : current_() {}
 
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
 ValueIteratorBase::ValueIteratorBase(
     const Value::ObjectValues::iterator& current)
     : current_(current), isNull_(false) {}
-#else
-ValueIteratorBase::ValueIteratorBase(
-    const ValueInternalArray::IteratorState& state)
-    : isArray_(true) {
-  iterator_.array_ = state;
-}
 
-ValueIteratorBase::ValueIteratorBase(
-    const ValueInternalMap::IteratorState& state)
-    : isArray_(false) {
-  iterator_.map_ = state;
-}
-#endif
+Value& ValueIteratorBase::deref() { return current_->second; }
+const Value& ValueIteratorBase::deref() const { return current_->second; }
 
-Value& ValueIteratorBase::deref() const {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  return current_->second;
-#else
-  if (isArray_)
-    return ValueInternalArray::dereference(iterator_.array_);
-  return ValueInternalMap::value(iterator_.map_);
-#endif
-}
+void ValueIteratorBase::increment() { ++current_; }
 
-void ValueIteratorBase::increment() {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  ++current_;
-#else
-  if (isArray_)
-    ValueInternalArray::increment(iterator_.array_);
-  ValueInternalMap::increment(iterator_.map_);
-#endif
-}
-
-void ValueIteratorBase::decrement() {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  --current_;
-#else
-  if (isArray_)
-    ValueInternalArray::decrement(iterator_.array_);
-  ValueInternalMap::decrement(iterator_.map_);
-#endif
-}
+void ValueIteratorBase::decrement() { --current_; }
 
 ValueIteratorBase::difference_type
 ValueIteratorBase::computeDistance(const SelfType& other) const {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-#ifdef JSON_USE_CPPTL_SMALLMAP
-  return current_ - other.current_;
-#else
   // Iterator for null value are initialized using the default
   // constructor, which initialize current_ to the default
   // std::map::iterator. As begin() and end() are two instance
@@ -99,81 +50,59 @@
     ++myDistance;
   }
   return myDistance;
-#endif
-#else
-  if (isArray_)
-    return ValueInternalArray::distance(iterator_.array_,
-                                        other.iterator_.array_);
-  return ValueInternalMap::distance(iterator_.map_, other.iterator_.map_);
-#endif
 }
 
 bool ValueIteratorBase::isEqual(const SelfType& other) const {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   if (isNull_) {
     return other.isNull_;
   }
   return current_ == other.current_;
-#else
-  if (isArray_)
-    return ValueInternalArray::equals(iterator_.array_, other.iterator_.array_);
-  return ValueInternalMap::equals(iterator_.map_, other.iterator_.map_);
-#endif
 }
 
 void ValueIteratorBase::copy(const SelfType& other) {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   current_ = other.current_;
   isNull_ = other.isNull_;
-#else
-  if (isArray_)
-    iterator_.array_ = other.iterator_.array_;
-  iterator_.map_ = other.iterator_.map_;
-#endif
 }
 
 Value ValueIteratorBase::key() const {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   const Value::CZString czstring = (*current_).first;
-  if (czstring.c_str()) {
+  if (czstring.data()) {
     if (czstring.isStaticString())
-      return Value(StaticString(czstring.c_str()));
-    return Value(czstring.c_str());
+      return Value(StaticString(czstring.data()));
+    return Value(czstring.data(), czstring.data() + czstring.length());
   }
   return Value(czstring.index());
-#else
-  if (isArray_)
-    return Value(ValueInternalArray::indexOf(iterator_.array_));
-  bool isStatic;
-  const char* memberName = ValueInternalMap::key(iterator_.map_, isStatic);
-  if (isStatic)
-    return Value(StaticString(memberName));
-  return Value(memberName);
-#endif
 }
 
 UInt ValueIteratorBase::index() const {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
   const Value::CZString czstring = (*current_).first;
-  if (!czstring.c_str())
+  if (!czstring.data())
     return czstring.index();
   return Value::UInt(-1);
-#else
-  if (isArray_)
-    return Value::UInt(ValueInternalArray::indexOf(iterator_.array_));
-  return Value::UInt(-1);
-#endif
 }
 
-const char* ValueIteratorBase::memberName() const {
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
-  const char* name = (*current_).first.c_str();
-  return name ? name : "";
-#else
-  if (!isArray_)
-    return ValueInternalMap::key(iterator_.map_);
-  return "";
-#endif
+String ValueIteratorBase::name() const {
+  char const* keey;
+  char const* end;
+  keey = memberName(&end);
+  if (!keey)
+    return String();
+  return String(keey, end);
+}
+
+char const* ValueIteratorBase::memberName() const {
+  const char* cname = (*current_).first.data();
+  return cname ? cname : "";
+}
+
+char const* ValueIteratorBase::memberName(char const** end) const {
+  const char* cname = (*current_).first.data();
+  if (!cname) {
+    *end = nullptr;
+    return nullptr;
+  }
+  *end = cname + (*current_).first.length();
+  return cname;
 }
 
 // //////////////////////////////////////////////////////////////////
@@ -184,21 +113,14 @@
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
 
-ValueConstIterator::ValueConstIterator() {}
+ValueConstIterator::ValueConstIterator() = default;
 
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
 ValueConstIterator::ValueConstIterator(
     const Value::ObjectValues::iterator& current)
     : ValueIteratorBase(current) {}
-#else
-ValueConstIterator::ValueConstIterator(
-    const ValueInternalArray::IteratorState& state)
-    : ValueIteratorBase(state) {}
 
-ValueConstIterator::ValueConstIterator(
-    const ValueInternalMap::IteratorState& state)
-    : ValueIteratorBase(state) {}
-#endif
+ValueConstIterator::ValueConstIterator(ValueIterator const& other)
+    : ValueIteratorBase(other) {}
 
 ValueConstIterator& ValueConstIterator::
 operator=(const ValueIteratorBase& other) {
@@ -214,24 +136,17 @@
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
 
-ValueIterator::ValueIterator() {}
+ValueIterator::ValueIterator() = default;
 
-#ifndef JSON_VALUE_USE_INTERNAL_MAP
 ValueIterator::ValueIterator(const Value::ObjectValues::iterator& current)
     : ValueIteratorBase(current) {}
-#else
-ValueIterator::ValueIterator(const ValueInternalArray::IteratorState& state)
-    : ValueIteratorBase(state) {}
-
-ValueIterator::ValueIterator(const ValueInternalMap::IteratorState& state)
-    : ValueIteratorBase(state) {}
-#endif
 
 ValueIterator::ValueIterator(const ValueConstIterator& other)
-    : ValueIteratorBase(other) {}
+    : ValueIteratorBase(other) {
+  throwRuntimeError("ConstIterator to Iterator should never be allowed.");
+}
 
-ValueIterator::ValueIterator(const ValueIterator& other)
-    : ValueIteratorBase(other) {}
+ValueIterator::ValueIterator(const ValueIterator& other) = default;
 
 ValueIterator& ValueIterator::operator=(const SelfType& other) {
   copy(other);
diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index 89964ea..8bf02db 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -1,55 +1,113 @@
-// Copyright 2011 Baptiste Lepilleur
+// Copyright 2011 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
 #if !defined(JSON_IS_AMALGAMATION)
-#include <json/writer.h>
 #include "json_tool.h"
+#include <json/writer.h>
 #endif // if !defined(JSON_IS_AMALGAMATION)
-#include <utility>
-#include <assert.h>
-#include <stdio.h>
-#include <string.h>
-#include <sstream>
+#include <algorithm>
+#include <cassert>
+#include <cctype>
+#include <cstring>
 #include <iomanip>
-#include <math.h>
+#include <memory>
+#include <set>
+#include <sstream>
+#include <utility>
 
-#if defined(_MSC_VER) && _MSC_VER < 1500 // VC++ 8.0 and below
-#include <float.h>
-#define isfinite _finite
-#define snprintf _snprintf
+#if __cplusplus >= 201103L
+#include <cmath>
+#include <cstdio>
+
+#if !defined(isnan)
+#define isnan std::isnan
 #endif
 
-#if defined(_MSC_VER) && _MSC_VER >= 1400 // VC++ 8.0
+#if !defined(isfinite)
+#define isfinite std::isfinite
+#endif
+
+#else
+#include <cmath>
+#include <cstdio>
+
+#if defined(_MSC_VER)
+#if !defined(isnan)
+#include <float.h>
+#define isnan _isnan
+#endif
+
+#if !defined(isfinite)
+#include <float.h>
+#define isfinite _finite
+#endif
+
+#if !defined(_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES)
+#define _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES 1
+#endif //_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES
+
+#endif //_MSC_VER
+
+#if defined(__sun) && defined(__SVR4) // Solaris
+#if !defined(isfinite)
+#include <ieeefp.h>
+#define isfinite finite
+#endif
+#endif
+
+#if defined(__hpux)
+#if !defined(isfinite)
+#if defined(__ia64) && !defined(finite)
+#define isfinite(x)                                                            \
+  ((sizeof(x) == sizeof(float) ? _Isfinitef(x) : _IsFinite(x)))
+#endif
+#endif
+#endif
+
+#if !defined(isnan)
+// IEEE standard states that NaN values will not compare to themselves
+#define isnan(x) (x != x)
+#endif
+
+#if !defined(__APPLE__)
+#if !defined(isfinite)
+#define isfinite finite
+#endif
+#endif
+#endif
+
+#if defined(_MSC_VER)
 // Disable warning about strdup being deprecated.
 #pragma warning(disable : 4996)
 #endif
 
 namespace Json {
 
-static bool containsControlCharacter(const char* str) {
-  while (*str) {
-    if (isControlCharacter(*(str++)))
-      return true;
-  }
-  return false;
-}
+#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520)
+using StreamWriterPtr = std::unique_ptr<StreamWriter>;
+#else
+using StreamWriterPtr = std::auto_ptr<StreamWriter>;
+#endif
 
-std::string valueToString(LargestInt value) {
+String valueToString(LargestInt value) {
   UIntToStringBuffer buffer;
   char* current = buffer + sizeof(buffer);
-  bool isNegative = value < 0;
-  if (isNegative)
-    value = -value;
-  uintToString(LargestUInt(value), current);
-  if (isNegative)
+  if (value == Value::minLargestInt) {
+    uintToString(LargestUInt(Value::maxLargestInt) + 1, current);
     *--current = '-';
+  } else if (value < 0) {
+    uintToString(LargestUInt(-value), current);
+    *--current = '-';
+  } else {
+    uintToString(LargestUInt(value), current);
+  }
   assert(current >= buffer);
   return current;
 }
 
-std::string valueToString(LargestUInt value) {
+String valueToString(LargestUInt value) {
   UIntToStringBuffer buffer;
   char* current = buffer + sizeof(buffer);
   uintToString(value, current);
@@ -59,71 +117,175 @@
 
 #if defined(JSON_HAS_INT64)
 
-std::string valueToString(Int value) {
-  return valueToString(LargestInt(value));
-}
+String valueToString(Int value) { return valueToString(LargestInt(value)); }
 
-std::string valueToString(UInt value) {
-  return valueToString(LargestUInt(value));
-}
+String valueToString(UInt value) { return valueToString(LargestUInt(value)); }
 
 #endif // # if defined(JSON_HAS_INT64)
 
-std::string valueToString(double value) {
-  // Allocate a buffer that is more than large enough to store the 16 digits of
-  // precision requested below.
-  char buffer[32];
-  int len = -1;
-
-// Print into the buffer. We need not request the alternative representation
-// that always has a decimal point because JSON doesn't distingish the
-// concepts of reals and integers.
-#if defined(_MSC_VER) && defined(__STDC_SECURE_LIB__) // Use secure version with
-                                                      // visual studio 2005 to
-                                                      // avoid warning.
-#if defined(WINCE)
-  len = _snprintf(buffer, sizeof(buffer), "%.16g", value);
-#else
-  len = sprintf_s(buffer, sizeof(buffer), "%.16g", value);
-#endif
-#else
-  if (isfinite(value)) {
-    len = snprintf(buffer, sizeof(buffer), "%.16g", value);
-  } else {
-    // IEEE standard states that NaN values will not compare to themselves
-    if (value != value) {
-      len = snprintf(buffer, sizeof(buffer), "null");
-    } else if (value < 0) {
-      len = snprintf(buffer, sizeof(buffer), "-1e+9999");
-    } else {
-      len = snprintf(buffer, sizeof(buffer), "1e+9999");
-    }
-    // For those, we do not need to call fixNumLoc, but it is fast.
+namespace {
+String valueToString(double value, bool useSpecialFloats,
+                     unsigned int precision, PrecisionType precisionType) {
+  // Print into the buffer. We need not request the alternative representation
+  // that always has a decimal point because JSON doesn't distinguish the
+  // concepts of reals and integers.
+  if (!isfinite(value)) {
+    static const char* const reps[2][3] = {{"NaN", "-Infinity", "Infinity"},
+                                           {"null", "-1e+9999", "1e+9999"}};
+    return reps[useSpecialFloats ? 0 : 1]
+               [isnan(value) ? 0 : (value < 0) ? 1 : 2];
   }
-#endif
-  assert(len >= 0);
-  fixNumericLocale(buffer, buffer + len);
+
+  String buffer(size_t(36), '\0');
+  while (true) {
+    int len = jsoncpp_snprintf(
+        &*buffer.begin(), buffer.size(),
+        (precisionType == PrecisionType::significantDigits) ? "%.*g" : "%.*f",
+        precision, value);
+    assert(len >= 0);
+    auto wouldPrint = static_cast<size_t>(len);
+    if (wouldPrint >= buffer.size()) {
+      buffer.resize(wouldPrint + 1);
+      continue;
+    }
+    buffer.resize(wouldPrint);
+    break;
+  }
+
+  buffer.erase(fixNumericLocale(buffer.begin(), buffer.end()), buffer.end());
+
+  // strip the zero padding from the right
+  if (precisionType == PrecisionType::decimalPlaces) {
+    buffer.erase(fixZerosInTheEnd(buffer.begin(), buffer.end()), buffer.end());
+  }
+
+  // try to ensure we preserve the fact that this was given to us as a double on
+  // input
+  if (buffer.find('.') == buffer.npos && buffer.find('e') == buffer.npos) {
+    buffer += ".0";
+  }
   return buffer;
 }
+} // namespace
 
-std::string valueToString(bool value) { return value ? "true" : "false"; }
+String valueToString(double value, unsigned int precision,
+                     PrecisionType precisionType) {
+  return valueToString(value, false, precision, precisionType);
+}
 
-std::string valueToQuotedString(const char* value) {
-  if (value == NULL)
+String valueToString(bool value) { return value ? "true" : "false"; }
+
+static bool doesAnyCharRequireEscaping(char const* s, size_t n) {
+  assert(s || !n);
+
+  return std::any_of(s, s + n, [](unsigned char c) {
+    return c == '\\' || c == '"' || c < 0x20 || c > 0x7F;
+  });
+}
+
+static unsigned int utf8ToCodepoint(const char*& s, const char* e) {
+  const unsigned int REPLACEMENT_CHARACTER = 0xFFFD;
+
+  unsigned int firstByte = static_cast<unsigned char>(*s);
+
+  if (firstByte < 0x80)
+    return firstByte;
+
+  if (firstByte < 0xE0) {
+    if (e - s < 2)
+      return REPLACEMENT_CHARACTER;
+
+    unsigned int calculated =
+        ((firstByte & 0x1F) << 6) | (static_cast<unsigned int>(s[1]) & 0x3F);
+    s += 1;
+    // oversized encoded characters are invalid
+    return calculated < 0x80 ? REPLACEMENT_CHARACTER : calculated;
+  }
+
+  if (firstByte < 0xF0) {
+    if (e - s < 3)
+      return REPLACEMENT_CHARACTER;
+
+    unsigned int calculated = ((firstByte & 0x0F) << 12) |
+                              ((static_cast<unsigned int>(s[1]) & 0x3F) << 6) |
+                              (static_cast<unsigned int>(s[2]) & 0x3F);
+    s += 2;
+    // surrogates aren't valid codepoints itself
+    // shouldn't be UTF-8 encoded
+    if (calculated >= 0xD800 && calculated <= 0xDFFF)
+      return REPLACEMENT_CHARACTER;
+    // oversized encoded characters are invalid
+    return calculated < 0x800 ? REPLACEMENT_CHARACTER : calculated;
+  }
+
+  if (firstByte < 0xF8) {
+    if (e - s < 4)
+      return REPLACEMENT_CHARACTER;
+
+    unsigned int calculated = ((firstByte & 0x07) << 18) |
+                              ((static_cast<unsigned int>(s[1]) & 0x3F) << 12) |
+                              ((static_cast<unsigned int>(s[2]) & 0x3F) << 6) |
+                              (static_cast<unsigned int>(s[3]) & 0x3F);
+    s += 3;
+    // oversized encoded characters are invalid
+    return calculated < 0x10000 ? REPLACEMENT_CHARACTER : calculated;
+  }
+
+  return REPLACEMENT_CHARACTER;
+}
+
+static const char hex2[] = "000102030405060708090a0b0c0d0e0f"
+                           "101112131415161718191a1b1c1d1e1f"
+                           "202122232425262728292a2b2c2d2e2f"
+                           "303132333435363738393a3b3c3d3e3f"
+                           "404142434445464748494a4b4c4d4e4f"
+                           "505152535455565758595a5b5c5d5e5f"
+                           "606162636465666768696a6b6c6d6e6f"
+                           "707172737475767778797a7b7c7d7e7f"
+                           "808182838485868788898a8b8c8d8e8f"
+                           "909192939495969798999a9b9c9d9e9f"
+                           "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
+                           "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
+                           "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
+                           "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
+                           "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
+                           "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
+
+static String toHex16Bit(unsigned int x) {
+  const unsigned int hi = (x >> 8) & 0xff;
+  const unsigned int lo = x & 0xff;
+  String result(4, ' ');
+  result[0] = hex2[2 * hi];
+  result[1] = hex2[2 * hi + 1];
+  result[2] = hex2[2 * lo];
+  result[3] = hex2[2 * lo + 1];
+  return result;
+}
+
+static void appendRaw(String& result, unsigned ch) {
+  result += static_cast<char>(ch);
+}
+
+static void appendHex(String& result, unsigned ch) {
+  result.append("\\u").append(toHex16Bit(ch));
+}
+
+static String valueToQuotedStringN(const char* value, unsigned length,
+                                   bool emitUTF8 = false) {
+  if (value == nullptr)
     return "";
-  // Not sure how to handle unicode...
-  if (strpbrk(value, "\"\\\b\f\n\r\t") == NULL &&
-      !containsControlCharacter(value))
-    return std::string("\"") + value + "\"";
+
+  if (!doesAnyCharRequireEscaping(value, length))
+    return String("\"") + value + "\"";
   // We have to walk value and escape any special characters.
-  // Appending to std::string is not efficient, but this should be rare.
+  // Appending to String is not efficient, but this should be rare.
   // (Note: forward slashes are *not* rare, but I am not escaping them.)
-  std::string::size_type maxsize =
-      strlen(value) * 2 + 3; // allescaped+quotes+NULL
-  std::string result;
+  String::size_type maxsize = length * 2 + 3; // allescaped+quotes+NULL
+  String result;
   result.reserve(maxsize); // to avoid lots of mallocs
   result += "\"";
-  for (const char* c = value; *c != 0; ++c) {
+  char const* end = value + length;
+  for (const char* c = value; c != end; ++c) {
     switch (*c) {
     case '\"':
       result += "\\\"";
@@ -149,49 +311,68 @@
     // case '/':
     // Even though \/ is considered a legal escape in JSON, a bare
     // slash is also legal, so I see no reason to escape it.
-    // (I hope I am not misunderstanding something.
+    // (I hope I am not misunderstanding something.)
     // blep notes: actually escaping \/ may be useful in javascript to avoid </
     // sequence.
     // Should add a flag to allow this compatibility mode and prevent this
     // sequence from occurring.
-    default:
-      if (isControlCharacter(*c)) {
-        std::ostringstream oss;
-        oss << "\\u" << std::hex << std::uppercase << std::setfill('0')
-            << std::setw(4) << static_cast<int>(*c);
-        result += oss.str();
+    default: {
+      if (emitUTF8) {
+        unsigned codepoint = static_cast<unsigned char>(*c);
+        if (codepoint < 0x20) {
+          appendHex(result, codepoint);
+        } else {
+          appendRaw(result, codepoint);
+        }
       } else {
-        result += *c;
+        unsigned codepoint = utf8ToCodepoint(c, end); // modifies `c`
+        if (codepoint < 0x20) {
+          appendHex(result, codepoint);
+        } else if (codepoint < 0x80) {
+          appendRaw(result, codepoint);
+        } else if (codepoint < 0x10000) {
+          // Basic Multilingual Plane
+          appendHex(result, codepoint);
+        } else {
+          // Extended Unicode. Encode 20 bits as a surrogate pair.
+          codepoint -= 0x10000;
+          appendHex(result, 0xd800 + ((codepoint >> 10) & 0x3ff));
+          appendHex(result, 0xdc00 + (codepoint & 0x3ff));
+        }
       }
-      break;
+    } break;
     }
   }
   result += "\"";
   return result;
 }
 
+String valueToQuotedString(const char* value) {
+  return valueToQuotedStringN(value, static_cast<unsigned int>(strlen(value)));
+}
+
 // Class Writer
 // //////////////////////////////////////////////////////////////////
-Writer::~Writer() {}
+Writer::~Writer() = default;
 
 // Class FastWriter
 // //////////////////////////////////////////////////////////////////
 
 FastWriter::FastWriter()
-    : yamlCompatiblityEnabled_(false), dropNullPlaceholders_(false),
-      omitEndingLineFeed_(false) {}
 
-void FastWriter::enableYAMLCompatibility() { yamlCompatiblityEnabled_ = true; }
+    = default;
+
+void FastWriter::enableYAMLCompatibility() { yamlCompatibilityEnabled_ = true; }
 
 void FastWriter::dropNullPlaceholders() { dropNullPlaceholders_ = true; }
 
 void FastWriter::omitEndingLineFeed() { omitEndingLineFeed_ = true; }
 
-std::string FastWriter::write(const Value& root) {
-  document_ = "";
+String FastWriter::write(const Value& root) {
+  document_.clear();
   writeValue(root);
   if (!omitEndingLineFeed_)
-    document_ += "\n";
+    document_ += '\n';
   return document_;
 }
 
@@ -210,16 +391,22 @@
   case realValue:
     document_ += valueToString(value.asDouble());
     break;
-  case stringValue:
-    document_ += valueToQuotedString(value.asCString());
+  case stringValue: {
+    // Is NULL possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      document_ += valueToQuotedStringN(str, static_cast<unsigned>(end - str));
     break;
+  }
   case booleanValue:
     document_ += valueToString(value.asBool());
     break;
   case arrayValue: {
     document_ += '[';
-    int size = value.size();
-    for (int index = 0; index < size; ++index) {
+    ArrayIndex size = value.size();
+    for (ArrayIndex index = 0; index < size; ++index) {
       if (index > 0)
         document_ += ',';
       writeValue(value[index]);
@@ -229,13 +416,13 @@
   case objectValue: {
     Value::Members members(value.getMemberNames());
     document_ += '{';
-    for (Value::Members::iterator it = members.begin(); it != members.end();
-         ++it) {
-      const std::string& name = *it;
+    for (auto it = members.begin(); it != members.end(); ++it) {
+      const String& name = *it;
       if (it != members.begin())
         document_ += ',';
-      document_ += valueToQuotedString(name.c_str());
-      document_ += yamlCompatiblityEnabled_ ? ": " : ":";
+      document_ += valueToQuotedStringN(name.data(),
+                                        static_cast<unsigned>(name.length()));
+      document_ += yamlCompatibilityEnabled_ ? ": " : ":";
       writeValue(value[name]);
     }
     document_ += '}';
@@ -246,17 +433,16 @@
 // Class StyledWriter
 // //////////////////////////////////////////////////////////////////
 
-StyledWriter::StyledWriter()
-    : rightMargin_(74), indentSize_(3), addChildValues_() {}
+StyledWriter::StyledWriter() = default;
 
-std::string StyledWriter::write(const Value& root) {
-  document_ = "";
+String StyledWriter::write(const Value& root) {
+  document_.clear();
   addChildValues_ = false;
-  indentString_ = "";
+  indentString_.clear();
   writeCommentBeforeValue(root);
   writeValue(root);
   writeCommentAfterValueOnSameLine(root);
-  document_ += "\n";
+  document_ += '\n';
   return document_;
 }
 
@@ -274,9 +460,17 @@
   case realValue:
     pushValue(valueToString(value.asDouble()));
     break;
-  case stringValue:
-    pushValue(valueToQuotedString(value.asCString()));
+  case stringValue: {
+    // Is NULL possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      pushValue(valueToQuotedStringN(str, static_cast<unsigned>(end - str)));
+    else
+      pushValue("");
     break;
+  }
   case booleanValue:
     pushValue(valueToString(value.asBool()));
     break;
@@ -290,9 +484,9 @@
     else {
       writeWithIndent("{");
       indent();
-      Value::Members::iterator it = members.begin();
+      auto it = members.begin();
       for (;;) {
-        const std::string& name = *it;
+        const String& name = *it;
         const Value& childValue = value[name];
         writeCommentBeforeValue(childValue);
         writeWithIndent(valueToQuotedString(name.c_str()));
@@ -317,7 +511,7 @@
   if (size == 0)
     pushValue("[]");
   else {
-    bool isArrayMultiLine = isMultineArray(value);
+    bool isArrayMultiLine = isMultilineArray(value);
     if (isArrayMultiLine) {
       writeWithIndent("[");
       indent();
@@ -355,24 +549,26 @@
   }
 }
 
-bool StyledWriter::isMultineArray(const Value& value) {
-  int size = value.size();
+bool StyledWriter::isMultilineArray(const Value& value) {
+  ArrayIndex const size = value.size();
   bool isMultiLine = size * 3 >= rightMargin_;
   childValues_.clear();
-  for (int index = 0; index < size && !isMultiLine; ++index) {
+  for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) {
     const Value& childValue = value[index];
-    isMultiLine =
-        isMultiLine || ((childValue.isArray() || childValue.isObject()) &&
-                        childValue.size() > 0);
+    isMultiLine = ((childValue.isArray() || childValue.isObject()) &&
+                   !childValue.empty());
   }
   if (!isMultiLine) // check if line length > max line length
   {
     childValues_.reserve(size);
     addChildValues_ = true;
-    int lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
-    for (int index = 0; index < size; ++index) {
+    ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
+    for (ArrayIndex index = 0; index < size; ++index) {
+      if (hasCommentForValue(value[index])) {
+        isMultiLine = true;
+      }
       writeValue(value[index]);
-      lineLength += int(childValues_[index].length());
+      lineLength += static_cast<ArrayIndex>(childValues_[index].length());
     }
     addChildValues_ = false;
     isMultiLine = isMultiLine || lineLength >= rightMargin_;
@@ -380,7 +576,7 @@
   return isMultiLine;
 }
 
-void StyledWriter::pushValue(const std::string& value) {
+void StyledWriter::pushValue(const String& value) {
   if (addChildValues_)
     childValues_.push_back(value);
   else
@@ -398,15 +594,15 @@
   document_ += indentString_;
 }
 
-void StyledWriter::writeWithIndent(const std::string& value) {
+void StyledWriter::writeWithIndent(const String& value) {
   writeIndent();
   document_ += value;
 }
 
-void StyledWriter::indent() { indentString_ += std::string(indentSize_, ' '); }
+void StyledWriter::indent() { indentString_ += String(indentSize_, ' '); }
 
 void StyledWriter::unindent() {
-  assert(int(indentString_.size()) >= indentSize_);
+  assert(indentString_.size() >= indentSize_);
   indentString_.resize(indentString_.size() - indentSize_);
 }
 
@@ -414,29 +610,29 @@
   if (!root.hasComment(commentBefore))
     return;
 
-  document_ += "\n";
+  document_ += '\n';
   writeIndent();
-  std::string normalizedComment = normalizeEOL(root.getComment(commentBefore));
-  std::string::const_iterator iter = normalizedComment.begin();
-  while (iter != normalizedComment.end()) {
+  const String& comment = root.getComment(commentBefore);
+  String::const_iterator iter = comment.begin();
+  while (iter != comment.end()) {
     document_ += *iter;
-    if (*iter == '\n' && *(iter + 1) == '/')
+    if (*iter == '\n' && ((iter + 1) != comment.end() && *(iter + 1) == '/'))
       writeIndent();
     ++iter;
   }
 
-  // Comments are stripped of newlines, so add one here
-  document_ += "\n";
+  // Comments are stripped of trailing newlines, so add one here
+  document_ += '\n';
 }
 
 void StyledWriter::writeCommentAfterValueOnSameLine(const Value& root) {
   if (root.hasComment(commentAfterOnSameLine))
-    document_ += " " + normalizeEOL(root.getComment(commentAfterOnSameLine));
+    document_ += " " + root.getComment(commentAfterOnSameLine);
 
   if (root.hasComment(commentAfter)) {
-    document_ += "\n";
-    document_ += normalizeEOL(root.getComment(commentAfter));
-    document_ += "\n";
+    document_ += '\n';
+    document_ += root.getComment(commentAfter);
+    document_ += '\n';
   }
 }
 
@@ -446,41 +642,26 @@
          value.hasComment(commentAfter);
 }
 
-std::string StyledWriter::normalizeEOL(const std::string& text) {
-  std::string normalized;
-  normalized.reserve(text.length());
-  const char* begin = text.c_str();
-  const char* end = begin + text.length();
-  const char* current = begin;
-  while (current != end) {
-    char c = *current++;
-    if (c == '\r') // mac or dos EOL
-    {
-      if (*current == '\n') // convert dos EOL
-        ++current;
-      normalized += '\n';
-    } else // handle unix EOL & other char
-      normalized += c;
-  }
-  return normalized;
-}
-
 // Class StyledStreamWriter
 // //////////////////////////////////////////////////////////////////
 
-StyledStreamWriter::StyledStreamWriter(std::string indentation)
-    : document_(NULL), rightMargin_(74), indentation_(indentation),
-      addChildValues_() {}
+StyledStreamWriter::StyledStreamWriter(String indentation)
+    : document_(nullptr), indentation_(std::move(indentation)),
+      addChildValues_(), indented_(false) {}
 
-void StyledStreamWriter::write(std::ostream& out, const Value& root) {
+void StyledStreamWriter::write(OStream& out, const Value& root) {
   document_ = &out;
   addChildValues_ = false;
-  indentString_ = "";
+  indentString_.clear();
+  indented_ = true;
   writeCommentBeforeValue(root);
+  if (!indented_)
+    writeIndent();
+  indented_ = true;
   writeValue(root);
   writeCommentAfterValueOnSameLine(root);
   *document_ << "\n";
-  document_ = NULL; // Forget the stream, for safety.
+  document_ = nullptr; // Forget the stream, for safety.
 }
 
 void StyledStreamWriter::writeValue(const Value& value) {
@@ -497,9 +678,17 @@
   case realValue:
     pushValue(valueToString(value.asDouble()));
     break;
-  case stringValue:
-    pushValue(valueToQuotedString(value.asCString()));
+  case stringValue: {
+    // Is NULL possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      pushValue(valueToQuotedStringN(str, static_cast<unsigned>(end - str)));
+    else
+      pushValue("");
     break;
+  }
   case booleanValue:
     pushValue(valueToString(value.asBool()));
     break;
@@ -513,9 +702,9 @@
     else {
       writeWithIndent("{");
       indent();
-      Value::Members::iterator it = members.begin();
+      auto it = members.begin();
       for (;;) {
-        const std::string& name = *it;
+        const String& name = *it;
         const Value& childValue = value[name];
         writeCommentBeforeValue(childValue);
         writeWithIndent(valueToQuotedString(name.c_str()));
@@ -540,7 +729,7 @@
   if (size == 0)
     pushValue("[]");
   else {
-    bool isArrayMultiLine = isMultineArray(value);
+    bool isArrayMultiLine = isMultilineArray(value);
     if (isArrayMultiLine) {
       writeWithIndent("[");
       indent();
@@ -552,8 +741,11 @@
         if (hasChildValue)
           writeWithIndent(childValues_[index]);
         else {
-          writeIndent();
+          if (!indented_)
+            writeIndent();
+          indented_ = true;
           writeValue(childValue);
+          indented_ = false;
         }
         if (++index == size) {
           writeCommentAfterValueOnSameLine(childValue);
@@ -578,24 +770,26 @@
   }
 }
 
-bool StyledStreamWriter::isMultineArray(const Value& value) {
-  int size = value.size();
+bool StyledStreamWriter::isMultilineArray(const Value& value) {
+  ArrayIndex const size = value.size();
   bool isMultiLine = size * 3 >= rightMargin_;
   childValues_.clear();
-  for (int index = 0; index < size && !isMultiLine; ++index) {
+  for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) {
     const Value& childValue = value[index];
-    isMultiLine =
-        isMultiLine || ((childValue.isArray() || childValue.isObject()) &&
-                        childValue.size() > 0);
+    isMultiLine = ((childValue.isArray() || childValue.isObject()) &&
+                   !childValue.empty());
   }
   if (!isMultiLine) // check if line length > max line length
   {
     childValues_.reserve(size);
     addChildValues_ = true;
-    int lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
-    for (int index = 0; index < size; ++index) {
+    ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
+    for (ArrayIndex index = 0; index < size; ++index) {
+      if (hasCommentForValue(value[index])) {
+        isMultiLine = true;
+      }
       writeValue(value[index]);
-      lineLength += int(childValues_[index].length());
+      lineLength += static_cast<ArrayIndex>(childValues_[index].length());
     }
     addChildValues_ = false;
     isMultiLine = isMultiLine || lineLength >= rightMargin_;
@@ -603,7 +797,7 @@
   return isMultiLine;
 }
 
-void StyledStreamWriter::pushValue(const std::string& value) {
+void StyledStreamWriter::pushValue(const String& value) {
   if (addChildValues_)
     childValues_.push_back(value);
   else
@@ -611,24 +805,18 @@
 }
 
 void StyledStreamWriter::writeIndent() {
-  /*
-    Some comments in this method would have been nice. ;-)
-
-   if ( !document_.empty() )
-   {
-      char last = document_[document_.length()-1];
-      if ( last == ' ' )     // already indented
-         return;
-      if ( last != '\n' )    // Comments may add new-line
-         *document_ << '\n';
-   }
-  */
+  // blep intended this to look at the so-far-written string
+  // to determine whether we are already indented, but
+  // with a stream we cannot do that. So we rely on some saved state.
+  // The caller checks indented_.
   *document_ << '\n' << indentString_;
 }
 
-void StyledStreamWriter::writeWithIndent(const std::string& value) {
-  writeIndent();
+void StyledStreamWriter::writeWithIndent(const String& value) {
+  if (!indented_)
+    writeIndent();
   *document_ << value;
+  indented_ = false;
 }
 
 void StyledStreamWriter::indent() { indentString_ += indentation_; }
@@ -641,19 +829,30 @@
 void StyledStreamWriter::writeCommentBeforeValue(const Value& root) {
   if (!root.hasComment(commentBefore))
     return;
-  *document_ << normalizeEOL(root.getComment(commentBefore));
-  *document_ << "\n";
+
+  if (!indented_)
+    writeIndent();
+  const String& comment = root.getComment(commentBefore);
+  String::const_iterator iter = comment.begin();
+  while (iter != comment.end()) {
+    *document_ << *iter;
+    if (*iter == '\n' && ((iter + 1) != comment.end() && *(iter + 1) == '/'))
+      // writeIndent();  // would include newline
+      *document_ << indentString_;
+    ++iter;
+  }
+  indented_ = false;
 }
 
 void StyledStreamWriter::writeCommentAfterValueOnSameLine(const Value& root) {
   if (root.hasComment(commentAfterOnSameLine))
-    *document_ << " " + normalizeEOL(root.getComment(commentAfterOnSameLine));
+    *document_ << ' ' << root.getComment(commentAfterOnSameLine);
 
   if (root.hasComment(commentAfter)) {
-    *document_ << "\n";
-    *document_ << normalizeEOL(root.getComment(commentAfter));
-    *document_ << "\n";
+    writeIndent();
+    *document_ << root.getComment(commentAfter);
   }
+  indented_ = false;
 }
 
 bool StyledStreamWriter::hasCommentForValue(const Value& value) {
@@ -662,28 +861,397 @@
          value.hasComment(commentAfter);
 }
 
-std::string StyledStreamWriter::normalizeEOL(const std::string& text) {
-  std::string normalized;
-  normalized.reserve(text.length());
-  const char* begin = text.c_str();
-  const char* end = begin + text.length();
-  const char* current = begin;
-  while (current != end) {
-    char c = *current++;
-    if (c == '\r') // mac or dos EOL
-    {
-      if (*current == '\n') // convert dos EOL
-        ++current;
-      normalized += '\n';
-    } else // handle unix EOL & other char
-      normalized += c;
+//////////////////////////
+// BuiltStyledStreamWriter
+
+/// Scoped enums are not available until C++11.
+struct CommentStyle {
+  /// Decide whether to write comments.
+  enum Enum {
+    None, ///< Drop all comments.
+    Most, ///< Recover odd behavior of previous versions (not implemented yet).
+    All   ///< Keep all comments.
+  };
+};
+
+struct BuiltStyledStreamWriter : public StreamWriter {
+  BuiltStyledStreamWriter(String indentation, CommentStyle::Enum cs,
+                          String colonSymbol, String nullSymbol,
+                          String endingLineFeedSymbol, bool useSpecialFloats,
+                          bool emitUTF8, unsigned int precision,
+                          PrecisionType precisionType);
+  int write(Value const& root, OStream* sout) override;
+
+private:
+  void writeValue(Value const& value);
+  void writeArrayValue(Value const& value);
+  bool isMultilineArray(Value const& value);
+  void pushValue(String const& value);
+  void writeIndent();
+  void writeWithIndent(String const& value);
+  void indent();
+  void unindent();
+  void writeCommentBeforeValue(Value const& root);
+  void writeCommentAfterValueOnSameLine(Value const& root);
+  static bool hasCommentForValue(const Value& value);
+
+  using ChildValues = std::vector<String>;
+
+  ChildValues childValues_;
+  String indentString_;
+  unsigned int rightMargin_;
+  String indentation_;
+  CommentStyle::Enum cs_;
+  String colonSymbol_;
+  String nullSymbol_;
+  String endingLineFeedSymbol_;
+  bool addChildValues_ : 1;
+  bool indented_ : 1;
+  bool useSpecialFloats_ : 1;
+  bool emitUTF8_ : 1;
+  unsigned int precision_;
+  PrecisionType precisionType_;
+};
+BuiltStyledStreamWriter::BuiltStyledStreamWriter(
+    String indentation, CommentStyle::Enum cs, String colonSymbol,
+    String nullSymbol, String endingLineFeedSymbol, bool useSpecialFloats,
+    bool emitUTF8, unsigned int precision, PrecisionType precisionType)
+    : rightMargin_(74), indentation_(std::move(indentation)), cs_(cs),
+      colonSymbol_(std::move(colonSymbol)), nullSymbol_(std::move(nullSymbol)),
+      endingLineFeedSymbol_(std::move(endingLineFeedSymbol)),
+      addChildValues_(false), indented_(false),
+      useSpecialFloats_(useSpecialFloats), emitUTF8_(emitUTF8),
+      precision_(precision), precisionType_(precisionType) {}
+int BuiltStyledStreamWriter::write(Value const& root, OStream* sout) {
+  sout_ = sout;
+  addChildValues_ = false;
+  indented_ = true;
+  indentString_.clear();
+  writeCommentBeforeValue(root);
+  if (!indented_)
+    writeIndent();
+  indented_ = true;
+  writeValue(root);
+  writeCommentAfterValueOnSameLine(root);
+  *sout_ << endingLineFeedSymbol_;
+  sout_ = nullptr;
+  return 0;
+}
+void BuiltStyledStreamWriter::writeValue(Value const& value) {
+  switch (value.type()) {
+  case nullValue:
+    pushValue(nullSymbol_);
+    break;
+  case intValue:
+    pushValue(valueToString(value.asLargestInt()));
+    break;
+  case uintValue:
+    pushValue(valueToString(value.asLargestUInt()));
+    break;
+  case realValue:
+    pushValue(valueToString(value.asDouble(), useSpecialFloats_, precision_,
+                            precisionType_));
+    break;
+  case stringValue: {
+    // Is NULL is possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      pushValue(valueToQuotedStringN(str, static_cast<unsigned>(end - str),
+                                     emitUTF8_));
+    else
+      pushValue("");
+    break;
   }
-  return normalized;
+  case booleanValue:
+    pushValue(valueToString(value.asBool()));
+    break;
+  case arrayValue:
+    writeArrayValue(value);
+    break;
+  case objectValue: {
+    Value::Members members(value.getMemberNames());
+    if (members.empty())
+      pushValue("{}");
+    else {
+      writeWithIndent("{");
+      indent();
+      auto it = members.begin();
+      for (;;) {
+        String const& name = *it;
+        Value const& childValue = value[name];
+        writeCommentBeforeValue(childValue);
+        writeWithIndent(valueToQuotedStringN(
+            name.data(), static_cast<unsigned>(name.length()), emitUTF8_));
+        *sout_ << colonSymbol_;
+        writeValue(childValue);
+        if (++it == members.end()) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        *sout_ << ",";
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("}");
+    }
+  } break;
+  }
 }
 
-std::ostream& operator<<(std::ostream& sout, const Value& root) {
-  Json::StyledStreamWriter writer;
-  writer.write(sout, root);
+void BuiltStyledStreamWriter::writeArrayValue(Value const& value) {
+  unsigned size = value.size();
+  if (size == 0)
+    pushValue("[]");
+  else {
+    bool isMultiLine = (cs_ == CommentStyle::All) || isMultilineArray(value);
+    if (isMultiLine) {
+      writeWithIndent("[");
+      indent();
+      bool hasChildValue = !childValues_.empty();
+      unsigned index = 0;
+      for (;;) {
+        Value const& childValue = value[index];
+        writeCommentBeforeValue(childValue);
+        if (hasChildValue)
+          writeWithIndent(childValues_[index]);
+        else {
+          if (!indented_)
+            writeIndent();
+          indented_ = true;
+          writeValue(childValue);
+          indented_ = false;
+        }
+        if (++index == size) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        *sout_ << ",";
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("]");
+    } else // output on a single line
+    {
+      assert(childValues_.size() == size);
+      *sout_ << "[";
+      if (!indentation_.empty())
+        *sout_ << " ";
+      for (unsigned index = 0; index < size; ++index) {
+        if (index > 0)
+          *sout_ << ((!indentation_.empty()) ? ", " : ",");
+        *sout_ << childValues_[index];
+      }
+      if (!indentation_.empty())
+        *sout_ << " ";
+      *sout_ << "]";
+    }
+  }
+}
+
+bool BuiltStyledStreamWriter::isMultilineArray(Value const& value) {
+  ArrayIndex const size = value.size();
+  bool isMultiLine = size * 3 >= rightMargin_;
+  childValues_.clear();
+  for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) {
+    Value const& childValue = value[index];
+    isMultiLine = ((childValue.isArray() || childValue.isObject()) &&
+                   !childValue.empty());
+  }
+  if (!isMultiLine) // check if line length > max line length
+  {
+    childValues_.reserve(size);
+    addChildValues_ = true;
+    ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
+    for (ArrayIndex index = 0; index < size; ++index) {
+      if (hasCommentForValue(value[index])) {
+        isMultiLine = true;
+      }
+      writeValue(value[index]);
+      lineLength += static_cast<ArrayIndex>(childValues_[index].length());
+    }
+    addChildValues_ = false;
+    isMultiLine = isMultiLine || lineLength >= rightMargin_;
+  }
+  return isMultiLine;
+}
+
+void BuiltStyledStreamWriter::pushValue(String const& value) {
+  if (addChildValues_)
+    childValues_.push_back(value);
+  else
+    *sout_ << value;
+}
+
+void BuiltStyledStreamWriter::writeIndent() {
+  // blep intended this to look at the so-far-written string
+  // to determine whether we are already indented, but
+  // with a stream we cannot do that. So we rely on some saved state.
+  // The caller checks indented_.
+
+  if (!indentation_.empty()) {
+    // In this case, drop newlines too.
+    *sout_ << '\n' << indentString_;
+  }
+}
+
+void BuiltStyledStreamWriter::writeWithIndent(String const& value) {
+  if (!indented_)
+    writeIndent();
+  *sout_ << value;
+  indented_ = false;
+}
+
+void BuiltStyledStreamWriter::indent() { indentString_ += indentation_; }
+
+void BuiltStyledStreamWriter::unindent() {
+  assert(indentString_.size() >= indentation_.size());
+  indentString_.resize(indentString_.size() - indentation_.size());
+}
+
+void BuiltStyledStreamWriter::writeCommentBeforeValue(Value const& root) {
+  if (cs_ == CommentStyle::None)
+    return;
+  if (!root.hasComment(commentBefore))
+    return;
+
+  if (!indented_)
+    writeIndent();
+  const String& comment = root.getComment(commentBefore);
+  String::const_iterator iter = comment.begin();
+  while (iter != comment.end()) {
+    *sout_ << *iter;
+    if (*iter == '\n' && ((iter + 1) != comment.end() && *(iter + 1) == '/'))
+      // writeIndent();  // would write extra newline
+      *sout_ << indentString_;
+    ++iter;
+  }
+  indented_ = false;
+}
+
+void BuiltStyledStreamWriter::writeCommentAfterValueOnSameLine(
+    Value const& root) {
+  if (cs_ == CommentStyle::None)
+    return;
+  if (root.hasComment(commentAfterOnSameLine))
+    *sout_ << " " + root.getComment(commentAfterOnSameLine);
+
+  if (root.hasComment(commentAfter)) {
+    writeIndent();
+    *sout_ << root.getComment(commentAfter);
+  }
+}
+
+// static
+bool BuiltStyledStreamWriter::hasCommentForValue(const Value& value) {
+  return value.hasComment(commentBefore) ||
+         value.hasComment(commentAfterOnSameLine) ||
+         value.hasComment(commentAfter);
+}
+
+///////////////
+// StreamWriter
+
+StreamWriter::StreamWriter() : sout_(nullptr) {}
+StreamWriter::~StreamWriter() = default;
+StreamWriter::Factory::~Factory() = default;
+StreamWriterBuilder::StreamWriterBuilder() { setDefaults(&settings_); }
+StreamWriterBuilder::~StreamWriterBuilder() = default;
+StreamWriter* StreamWriterBuilder::newStreamWriter() const {
+  const String indentation = settings_["indentation"].asString();
+  const String cs_str = settings_["commentStyle"].asString();
+  const String pt_str = settings_["precisionType"].asString();
+  const bool eyc = settings_["enableYAMLCompatibility"].asBool();
+  const bool dnp = settings_["dropNullPlaceholders"].asBool();
+  const bool usf = settings_["useSpecialFloats"].asBool();
+  const bool emitUTF8 = settings_["emitUTF8"].asBool();
+  unsigned int pre = settings_["precision"].asUInt();
+  CommentStyle::Enum cs = CommentStyle::All;
+  if (cs_str == "All") {
+    cs = CommentStyle::All;
+  } else if (cs_str == "None") {
+    cs = CommentStyle::None;
+  } else {
+    throwRuntimeError("commentStyle must be 'All' or 'None'");
+  }
+  PrecisionType precisionType(significantDigits);
+  if (pt_str == "significant") {
+    precisionType = PrecisionType::significantDigits;
+  } else if (pt_str == "decimal") {
+    precisionType = PrecisionType::decimalPlaces;
+  } else {
+    throwRuntimeError("precisionType must be 'significant' or 'decimal'");
+  }
+  String colonSymbol = " : ";
+  if (eyc) {
+    colonSymbol = ": ";
+  } else if (indentation.empty()) {
+    colonSymbol = ":";
+  }
+  String nullSymbol = "null";
+  if (dnp) {
+    nullSymbol.clear();
+  }
+  if (pre > 17)
+    pre = 17;
+  String endingLineFeedSymbol;
+  return new BuiltStyledStreamWriter(indentation, cs, colonSymbol, nullSymbol,
+                                     endingLineFeedSymbol, usf, emitUTF8, pre,
+                                     precisionType);
+}
+
+bool StreamWriterBuilder::validate(Json::Value* invalid) const {
+  static const auto& valid_keys = *new std::set<String>{
+      "indentation",
+      "commentStyle",
+      "enableYAMLCompatibility",
+      "dropNullPlaceholders",
+      "useSpecialFloats",
+      "emitUTF8",
+      "precision",
+      "precisionType",
+  };
+  for (auto si = settings_.begin(); si != settings_.end(); ++si) {
+    auto key = si.name();
+    if (valid_keys.count(key))
+      continue;
+    if (invalid)
+      (*invalid)[std::move(key)] = *si;
+    else
+      return false;
+  }
+  return invalid ? invalid->empty() : true;
+}
+
+Value& StreamWriterBuilder::operator[](const String& key) {
+  return settings_[key];
+}
+// static
+void StreamWriterBuilder::setDefaults(Json::Value* settings) {
+  //! [StreamWriterBuilderDefaults]
+  (*settings)["commentStyle"] = "All";
+  (*settings)["indentation"] = "\t";
+  (*settings)["enableYAMLCompatibility"] = false;
+  (*settings)["dropNullPlaceholders"] = false;
+  (*settings)["useSpecialFloats"] = false;
+  (*settings)["emitUTF8"] = false;
+  (*settings)["precision"] = 17;
+  (*settings)["precisionType"] = "significant";
+  //! [StreamWriterBuilderDefaults]
+}
+
+String writeString(StreamWriter::Factory const& factory, Value const& root) {
+  OStringStream sout;
+  StreamWriterPtr const writer(factory.newStreamWriter());
+  writer->write(root, &sout);
+  return sout.str();
+}
+
+OStream& operator<<(OStream& sout, Value const& root) {
+  StreamWriterBuilder builder;
+  StreamWriterPtr const writer(builder.newStreamWriter());
+  writer->write(root, &sout);
   return sout;
 }
 
diff --git a/src/lib_json/sconscript b/src/lib_json/sconscript
deleted file mode 100644
index 6e7c6c8..0000000
--- a/src/lib_json/sconscript
+++ /dev/null
@@ -1,8 +0,0 @@
-Import( 'env buildLibrary' )
-
-buildLibrary( env, Split( """
-    json_reader.cpp 
-    json_value.cpp 
-    json_writer.cpp
-     """ ),
-    'json' )
diff --git a/src/lib_json/version.h.in b/src/lib_json/version.h.in
deleted file mode 100644
index 761ca3a..0000000
--- a/src/lib_json/version.h.in
+++ /dev/null
@@ -1,14 +0,0 @@
-// DO NOT EDIT. This file is generated by CMake from  "version"
-// and "version.h.in" files.
-// Run CMake configure step to update it.
-#ifndef JSON_VERSION_H_INCLUDED
-# define JSON_VERSION_H_INCLUDED
-
-# define JSONCPP_VERSION_STRING "@JSONCPP_VERSION@"
-# define JSONCPP_VERSION_MAJOR @JSONCPP_VERSION_MAJOR@
-# define JSONCPP_VERSION_MINOR @JSONCPP_VERSION_MINOR@
-# define JSONCPP_VERSION_PATCH @JSONCPP_VERSION_PATCH@
-# define JSONCPP_VERSION_QUALIFIER
-# define JSONCPP_VERSION_HEXA ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) | (JSONCPP_VERSION_PATCH << 8))
-
-#endif // JSON_VERSION_H_INCLUDED
diff --git a/src/test_lib_json/CMakeLists.txt b/src/test_lib_json/CMakeLists.txt
index 420d659..1c3fce9 100644
--- a/src/test_lib_json/CMakeLists.txt
+++ b/src/test_lib_json/CMakeLists.txt
@@ -1,22 +1,39 @@
+# vim: et ts=4 sts=4 sw=4 tw=0
 
-IF(JSONCPP_LIB_BUILD_SHARED)
-  ADD_DEFINITIONS( -DJSON_DLL )
-ENDIF(JSONCPP_LIB_BUILD_SHARED)
+add_executable(jsoncpp_test
+    jsontest.cpp
+    jsontest.h
+    fuzz.cpp
+    fuzz.h
+    main.cpp
+)
 
-ADD_EXECUTABLE( jsoncpp_test 
-                jsontest.cpp
-                jsontest.h
-                main.cpp
-                )
 
-TARGET_LINK_LIBRARIES(jsoncpp_test jsoncpp_lib)
+if(BUILD_SHARED_LIBS)
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12.0)
+        add_compile_definitions( JSON_DLL )
+    else()
+        add_definitions( -DJSON_DLL )
+    endif()
+    target_link_libraries(jsoncpp_test jsoncpp_lib)
+else()
+    target_link_libraries(jsoncpp_test jsoncpp_static)
+endif()
+
+# another way to solve issue #90
+#set_target_properties(jsoncpp_test PROPERTIES COMPILE_FLAGS -ffloat-store)
+
+## Create tests for dashboard submission, allows easy review of CI results https://my.cdash.org/index.php?project=jsoncpp
+add_test(NAME jsoncpp_test
+    COMMAND ${CMAKE_CROSSCOMPILING_EMULATOR} $<TARGET_FILE:jsoncpp_test>
+)
+set_target_properties(jsoncpp_test PROPERTIES OUTPUT_NAME jsoncpp_test)
 
 # Run unit tests in post-build
 # (default cmake workflow hides away the test result into a file, resulting in poor dev workflow?!?)
-IF(JSONCPP_WITH_POST_BUILD_UNITTEST)
-    ADD_CUSTOM_COMMAND( TARGET jsoncpp_test
-                        POST_BUILD
-                        COMMAND $<TARGET_FILE:jsoncpp_test>)
-ENDIF(JSONCPP_WITH_POST_BUILD_UNITTEST)
-
-SET_TARGET_PROPERTIES(jsoncpp_test PROPERTIES OUTPUT_NAME jsoncpp_test) 
+if(JSONCPP_WITH_POST_BUILD_UNITTEST)
+    add_custom_command(TARGET jsoncpp_test
+        POST_BUILD
+        COMMAND ${CMAKE_CROSSCOMPILING_EMULATOR} $<TARGET_FILE:jsoncpp_test>
+    )
+endif()
diff --git a/src/test_lib_json/fuzz.cpp b/src/test_lib_json/fuzz.cpp
new file mode 100644
index 0000000..5b75c22
--- /dev/null
+++ b/src/test_lib_json/fuzz.cpp
@@ -0,0 +1,54 @@
+// Copyright 2007-2019 The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#include "fuzz.h"
+
+#include <cstdint>
+#include <json/config.h>
+#include <json/json.h>
+#include <memory>
+#include <string>
+
+namespace Json {
+class Exception;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  Json::CharReaderBuilder builder;
+
+  if (size < sizeof(uint32_t)) {
+    return 0;
+  }
+
+  const uint32_t hash_settings = static_cast<uint32_t>(data[0]) |
+                                 (static_cast<uint32_t>(data[1]) << 8) |
+                                 (static_cast<uint32_t>(data[2]) << 16) |
+                                 (static_cast<uint32_t>(data[3]) << 24);
+  data += sizeof(uint32_t);
+  size -= sizeof(uint32_t);
+
+  builder.settings_["failIfExtra"] = hash_settings & (1 << 0);
+  builder.settings_["allowComments_"] = hash_settings & (1 << 1);
+  builder.settings_["strictRoot_"] = hash_settings & (1 << 2);
+  builder.settings_["allowDroppedNullPlaceholders_"] = hash_settings & (1 << 3);
+  builder.settings_["allowNumericKeys_"] = hash_settings & (1 << 4);
+  builder.settings_["allowSingleQuotes_"] = hash_settings & (1 << 5);
+  builder.settings_["failIfExtra_"] = hash_settings & (1 << 6);
+  builder.settings_["rejectDupKeys_"] = hash_settings & (1 << 7);
+  builder.settings_["allowSpecialFloats_"] = hash_settings & (1 << 8);
+  builder.settings_["collectComments"] = hash_settings & (1 << 9);
+  builder.settings_["allowTrailingCommas_"] = hash_settings & (1 << 10);
+
+  std::unique_ptr<Json::CharReader> reader(builder.newCharReader());
+
+  Json::Value root;
+  const auto data_str = reinterpret_cast<const char*>(data);
+  try {
+    reader->parse(data_str, data_str + size, &root, nullptr);
+  } catch (Json::Exception const&) {
+  }
+  // Whether it succeeded or not doesn't matter.
+  return 0;
+}
diff --git a/src/test_lib_json/fuzz.dict b/src/test_lib_json/fuzz.dict
new file mode 100644
index 0000000..725423d
--- /dev/null
+++ b/src/test_lib_json/fuzz.dict
@@ -0,0 +1,54 @@
+#
+# AFL dictionary for JSON
+# -----------------------
+#
+# Just the very basics.
+#
+# Inspired by a dictionary by Jakub Wilk <jwilk@jwilk.net>
+#
+# https://github.com/rc0r/afl-fuzz/blob/master/dictionaries/json.dict
+#
+
+"0"
+",0"
+":0"
+"0:"
+"-1.2e+3"
+
+"true"
+"false"
+"null"
+
+"\"\""
+",\"\""
+":\"\""
+"\"\":"
+
+"{}"
+",{}"
+":{}"
+"{\"\":0}"
+"{{}}"
+
+"[]"
+",[]"
+":[]"
+"[0]"
+"[[]]"
+
+"''"
+"\\"
+"\\b"
+"\\f"
+"\\n"
+"\\r"
+"\\t"
+"\\u0000"
+"\\x00"
+"\\0"
+"\\uD800\\uDC00"
+"\\uDBFF\\uDFFF"
+
+"\"\":0"
+"//"
+"/**/"
diff --git a/src/test_lib_json/fuzz.h b/src/test_lib_json/fuzz.h
new file mode 100644
index 0000000..0816d27
--- /dev/null
+++ b/src/test_lib_json/fuzz.h
@@ -0,0 +1,14 @@
+// Copyright 2007-2010 The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef FUZZ_H_INCLUDED
+#define FUZZ_H_INCLUDED
+
+#include <cstddef>
+#include <stdint.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
+
+#endif // ifndef FUZZ_H_INCLUDED
diff --git a/src/test_lib_json/jsontest.cpp b/src/test_lib_json/jsontest.cpp
index ef9c543..0b7d12b 100644
--- a/src/test_lib_json/jsontest.cpp
+++ b/src/test_lib_json/jsontest.cpp
@@ -1,11 +1,11 @@
-// Copyright 2007-2010 Baptiste Lepilleur
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
 #define _CRT_SECURE_NO_WARNINGS 1 // Prevents deprecation warning with MSVC
 #include "jsontest.h"
-#include <stdio.h>
+#include <cstdio>
 #include <string>
 
 #if defined(_MSC_VER)
@@ -73,28 +73,27 @@
 // class TestResult
 // //////////////////////////////////////////////////////////////////
 
-TestResult::TestResult()
-    : predicateId_(1), lastUsedPredicateId_(0), messageTarget_(0) {
+TestResult::TestResult() {
   // The root predicate has id 0
   rootPredicateNode_.id_ = 0;
-  rootPredicateNode_.next_ = 0;
+  rootPredicateNode_.next_ = nullptr;
   predicateStackTail_ = &rootPredicateNode_;
 }
 
-void TestResult::setTestName(const std::string& name) { name_ = name; }
+void TestResult::setTestName(const Json::String& name) { name_ = name; }
 
-TestResult&
-TestResult::addFailure(const char* file, unsigned int line, const char* expr) {
+TestResult& TestResult::addFailure(const char* file, unsigned int line,
+                                   const char* expr) {
   /// Walks the PredicateContext stack adding them to failures_ if not already
   /// added.
   unsigned int nestingLevel = 0;
   PredicateContext* lastNode = rootPredicateNode_.next_;
-  for (; lastNode != 0; lastNode = lastNode->next_) {
+  for (; lastNode != nullptr; lastNode = lastNode->next_) {
     if (lastNode->id_ > lastUsedPredicateId_) // new PredicateContext
     {
       lastUsedPredicateId_ = lastNode->id_;
-      addFailureInfo(
-          lastNode->file_, lastNode->line_, lastNode->expr_, nestingLevel);
+      addFailureInfo(lastNode->file_, lastNode->line_, lastNode->expr_,
+                     nestingLevel);
       // Link the PredicateContext to the failure for message target when
       // popping the PredicateContext.
       lastNode->failure_ = &(failures_.back());
@@ -108,10 +107,8 @@
   return *this;
 }
 
-void TestResult::addFailureInfo(const char* file,
-                                unsigned int line,
-                                const char* expr,
-                                unsigned int nestingLevel) {
+void TestResult::addFailureInfo(const char* file, unsigned int line,
+                                const char* expr, unsigned int nestingLevel) {
   Failure failure;
   failure.file_ = file;
   failure.line_ = line;
@@ -124,32 +121,22 @@
 
 TestResult& TestResult::popPredicateContext() {
   PredicateContext* lastNode = &rootPredicateNode_;
-  while (lastNode->next_ != 0 && lastNode->next_->next_ != 0) {
+  while (lastNode->next_ != nullptr && lastNode->next_->next_ != nullptr) {
     lastNode = lastNode->next_;
   }
   // Set message target to popped failure
   PredicateContext* tail = lastNode->next_;
-  if (tail != 0 && tail->failure_ != 0) {
+  if (tail != nullptr && tail->failure_ != nullptr) {
     messageTarget_ = tail->failure_;
   }
   // Remove tail from list
   predicateStackTail_ = lastNode;
-  lastNode->next_ = 0;
+  lastNode->next_ = nullptr;
   return *this;
 }
 
 bool TestResult::failed() const { return !failures_.empty(); }
 
-unsigned int TestResult::getAssertionNestingLevel() const {
-  unsigned int level = 0;
-  const PredicateContext* lastNode = &rootPredicateNode_;
-  while (lastNode->next_ != 0) {
-    lastNode = lastNode->next_;
-    ++level;
-  }
-  return level;
-}
-
 void TestResult::printFailure(bool printTestName) const {
   if (failures_.empty()) {
     return;
@@ -160,12 +147,10 @@
   }
 
   // Print in reverse to display the callstack in the right order
-  Failures::const_iterator itEnd = failures_.end();
-  for (Failures::const_iterator it = failures_.begin(); it != itEnd; ++it) {
-    const Failure& failure = *it;
-    std::string indent(failure.nestingLevel_ * 2, ' ');
+  for (const auto& failure : failures_) {
+    Json::String indent(failure.nestingLevel_ * 2, ' ');
     if (failure.file_) {
-      printf("%s%s(%d): ", indent.c_str(), failure.file_, failure.line_);
+      printf("%s%s(%u): ", indent.c_str(), failure.file_, failure.line_);
     }
     if (!failure.expr_.empty()) {
       printf("%s\n", failure.expr_.c_str());
@@ -173,19 +158,19 @@
       printf("\n");
     }
     if (!failure.message_.empty()) {
-      std::string reindented = indentText(failure.message_, indent + "  ");
+      Json::String reindented = indentText(failure.message_, indent + "  ");
       printf("%s\n", reindented.c_str());
     }
   }
 }
 
-std::string TestResult::indentText(const std::string& text,
-                                   const std::string& indent) {
-  std::string reindented;
-  std::string::size_type lastIndex = 0;
+Json::String TestResult::indentText(const Json::String& text,
+                                    const Json::String& indent) {
+  Json::String reindented;
+  Json::String::size_type lastIndex = 0;
   while (lastIndex < text.size()) {
-    std::string::size_type nextIndex = text.find('\n', lastIndex);
-    if (nextIndex == std::string::npos) {
+    Json::String::size_type nextIndex = text.find('\n', lastIndex);
+    if (nextIndex == Json::String::npos) {
       nextIndex = text.size() - 1;
     }
     reindented += indent;
@@ -195,8 +180,8 @@
   return reindented;
 }
 
-TestResult& TestResult::addToLastFailure(const std::string& message) {
-  if (messageTarget_ != 0) {
+TestResult& TestResult::addToLastFailure(const Json::String& message) {
+  if (messageTarget_ != nullptr) {
     messageTarget_->message_ += message;
   }
   return *this;
@@ -217,9 +202,9 @@
 // class TestCase
 // //////////////////////////////////////////////////////////////////
 
-TestCase::TestCase() : result_(0) {}
+TestCase::TestCase() = default;
 
-TestCase::~TestCase() {}
+TestCase::~TestCase() = default;
 
 void TestCase::run(TestResult& result) {
   result_ = &result;
@@ -229,25 +214,23 @@
 // class Runner
 // //////////////////////////////////////////////////////////////////
 
-Runner::Runner() {}
+Runner::Runner() = default;
 
 Runner& Runner::add(TestCaseFactory factory) {
   tests_.push_back(factory);
   return *this;
 }
 
-unsigned int Runner::testCount() const {
-  return static_cast<unsigned int>(tests_.size());
-}
+size_t Runner::testCount() const { return tests_.size(); }
 
-std::string Runner::testNameAt(unsigned int index) const {
+Json::String Runner::testNameAt(size_t index) const {
   TestCase* test = tests_[index]();
-  std::string name = test->testName();
+  Json::String name = test->testName();
   delete test;
   return name;
 }
 
-void Runner::runTestAt(unsigned int index, TestResult& result) const {
+void Runner::runTestAt(size_t index, TestResult& result) const {
   TestCase* test = tests_[index]();
   result.setTestName(test->testName());
   printf("Testing %s: ", test->testName());
@@ -257,8 +240,7 @@
 #endif // if JSON_USE_EXCEPTION
     test->run(result);
 #if JSON_USE_EXCEPTION
-  }
-  catch (const std::exception& e) {
+  } catch (const std::exception& e) {
     result.addFailure(__FILE__, __LINE__, "Unexpected exception caught:")
         << e.what();
   }
@@ -270,9 +252,9 @@
 }
 
 bool Runner::runAllTest(bool printSummary) const {
-  unsigned int count = testCount();
+  size_t const count = testCount();
   std::deque<TestResult> failures;
-  for (unsigned int index = 0; index < count; ++index) {
+  for (size_t index = 0; index < count; ++index) {
     TestResult result;
     runTestAt(index, result);
     if (result.failed()) {
@@ -282,31 +264,26 @@
 
   if (failures.empty()) {
     if (printSummary) {
-      printf("All %d tests passed\n", count);
+      printf("All %zu tests passed\n", count);
     }
     return true;
-  } else {
-    for (unsigned int index = 0; index < failures.size(); ++index) {
-      TestResult& result = failures[index];
-      result.printFailure(count > 1);
-    }
-
-    if (printSummary) {
-      unsigned int failedCount = static_cast<unsigned int>(failures.size());
-      unsigned int passedCount = count - failedCount;
-      printf("%d/%d tests passed (%d failure(s))\n",
-             passedCount,
-             count,
-             failedCount);
-    }
-    return false;
   }
+  for (auto& result : failures) {
+    result.printFailure(count > 1);
+  }
+
+  if (printSummary) {
+    size_t const failedCount = failures.size();
+    size_t const passedCount = count - failedCount;
+    printf("%zu/%zu tests passed (%zu failure(s))\n", passedCount, count,
+           failedCount);
+  }
+  return false;
 }
 
-bool Runner::testIndex(const std::string& testName,
-                       unsigned int& indexOut) const {
-  unsigned int count = testCount();
-  for (unsigned int index = 0; index < count; ++index) {
+bool Runner::testIndex(const Json::String& testName, size_t& indexOut) const {
+  const size_t count = testCount();
+  for (size_t index = 0; index < count; ++index) {
     if (testNameAt(index) == testName) {
       indexOut = index;
       return true;
@@ -316,26 +293,27 @@
 }
 
 void Runner::listTests() const {
-  unsigned int count = testCount();
-  for (unsigned int index = 0; index < count; ++index) {
+  const size_t count = testCount();
+  for (size_t index = 0; index < count; ++index) {
     printf("%s\n", testNameAt(index).c_str());
   }
 }
 
 int Runner::runCommandLine(int argc, const char* argv[]) const {
-  typedef std::deque<std::string> TestNames;
+  // typedef std::deque<String> TestNames;
   Runner subrunner;
   for (int index = 1; index < argc; ++index) {
-    std::string opt = argv[index];
+    Json::String opt = argv[index];
     if (opt == "--list-tests") {
       listTests();
       return 0;
-    } else if (opt == "--test-auto") {
+    }
+    if (opt == "--test-auto") {
       preventDialogOnCrash();
     } else if (opt == "--test") {
       ++index;
       if (index < argc) {
-        unsigned int testNameIndex;
+        size_t testNameIndex;
         if (testIndex(argv[index], testNameIndex)) {
           subrunner.add(tests_[testNameIndex]);
         } else {
@@ -362,8 +340,8 @@
 
 #if defined(_MSC_VER) && defined(_DEBUG)
 // Hook MSVCRT assertions to prevent dialog from appearing
-static int
-msvcrtSilentReportHook(int reportType, char* message, int* /*returnValue*/) {
+static int msvcrtSilentReportHook(int reportType, char* message,
+                                  int* /*returnValue*/) {
   // The default CRT handling of error and assertion is to display
   // an error dialog to the user.
   // Instead, when an error or an assertion occurs, we force the
@@ -398,8 +376,8 @@
   _CrtSetReportHook(&msvcrtSilentReportHook);
 #endif // if defined(_MSC_VER)
 
-// @todo investiguate this handler (for buffer overflow)
-// _set_security_error_handler
+  // @todo investigate this handler (for buffer overflow)
+  // _set_security_error_handler
 
 #if defined(_WIN32)
   // Prevents the system from popping a dialog for debugging if the
@@ -426,12 +404,21 @@
 // Assertion functions
 // //////////////////////////////////////////////////////////////////
 
-TestResult& checkStringEqual(TestResult& result,
-                             const std::string& expected,
-                             const std::string& actual,
-                             const char* file,
-                             unsigned int line,
-                             const char* expr) {
+Json::String ToJsonString(const char* toConvert) {
+  return Json::String(toConvert);
+}
+
+Json::String ToJsonString(Json::String in) { return in; }
+
+#if JSONCPP_USING_SECURE_MEMORY
+Json::String ToJsonString(std::string in) {
+  return Json::String(in.data(), in.data() + in.length());
+}
+#endif
+
+TestResult& checkStringEqual(TestResult& result, const Json::String& expected,
+                             const Json::String& actual, const char* file,
+                             unsigned int line, const char* expr) {
   if (expected != actual) {
     result.addFailure(file, line, expr);
     result << "Expected: '" << expected << "'\n";
diff --git a/src/test_lib_json/jsontest.h b/src/test_lib_json/jsontest.h
index 5c56a40..4e8af0f 100644
--- a/src/test_lib_json/jsontest.h
+++ b/src/test_lib_json/jsontest.h
@@ -1,4 +1,4 @@
-// Copyright 2007-2010 Baptiste Lepilleur
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
@@ -6,11 +6,12 @@
 #ifndef JSONTEST_H_INCLUDED
 #define JSONTEST_H_INCLUDED
 
+#include <cstdio>
+#include <deque>
+#include <iomanip>
 #include <json/config.h>
 #include <json/value.h>
 #include <json/writer.h>
-#include <stdio.h>
-#include <deque>
 #include <sstream>
 #include <string>
 
@@ -32,8 +33,8 @@
 public:
   const char* file_;
   unsigned int line_;
-  std::string expr_;
-  std::string message_;
+  Json::String expr_;
+  Json::String message_;
   unsigned int nestingLevel_;
 };
 
@@ -41,7 +42,7 @@
 /// Must be a POD to allow inline initialisation without stepping
 /// into the debugger.
 struct PredicateContext {
-  typedef unsigned int Id;
+  using Id = unsigned int;
   Id id_;
   const char* file_;
   unsigned int line_;
@@ -60,16 +61,16 @@
   /// Not encapsulated to prevent step into when debugging failed assertions
   /// Incremented by one on assertion predicate entry, decreased by one
   /// by addPredicateContext().
-  PredicateContext::Id predicateId_;
+  PredicateContext::Id predicateId_{1};
 
   /// \internal Implementation detail for predicate macros
   PredicateContext* predicateStackTail_;
 
-  void setTestName(const std::string& name);
+  void setTestName(const Json::String& name);
 
   /// Adds an assertion failure.
-  TestResult&
-  addFailure(const char* file, unsigned int line, const char* expr = 0);
+  TestResult& addFailure(const char* file, unsigned int line,
+                         const char* expr = nullptr);
 
   /// Removes the last PredicateContext added to the predicate stack
   /// chained list.
@@ -82,10 +83,8 @@
 
   // Generic operator that will work with anything ostream can deal with.
   template <typename T> TestResult& operator<<(const T& value) {
-    std::ostringstream oss;
-    oss.precision(16);
-    oss.setf(std::ios_base::floatfield);
-    oss << value;
+    Json::OStringStream oss;
+    oss << std::setprecision(16) << std::hexfloat << value;
     return addToLastFailure(oss.str());
   }
 
@@ -96,23 +95,20 @@
   TestResult& operator<<(Json::UInt64 value);
 
 private:
-  TestResult& addToLastFailure(const std::string& message);
-  unsigned int getAssertionNestingLevel() const;
+  TestResult& addToLastFailure(const Json::String& message);
   /// Adds a failure or a predicate context
-  void addFailureInfo(const char* file,
-                      unsigned int line,
-                      const char* expr,
+  void addFailureInfo(const char* file, unsigned int line, const char* expr,
                       unsigned int nestingLevel);
-  static std::string indentText(const std::string& text,
-                                const std::string& indent);
+  static Json::String indentText(const Json::String& text,
+                                 const Json::String& indent);
 
-  typedef std::deque<Failure> Failures;
+  using Failures = std::deque<Failure>;
   Failures failures_;
-  std::string name_;
+  Json::String name_;
   PredicateContext rootPredicateNode_;
-  PredicateContext::Id lastUsedPredicateId_;
+  PredicateContext::Id lastUsedPredicateId_{0};
   /// Failure which is the target of the messages added using operator <<
-  Failure* messageTarget_;
+  Failure* messageTarget_{nullptr};
 };
 
 class TestCase {
@@ -126,14 +122,14 @@
   virtual const char* testName() const = 0;
 
 protected:
-  TestResult* result_;
+  TestResult* result_{nullptr};
 
 private:
   virtual void runTestCase() = 0;
 };
 
 /// Function pointer type for TestCase factory
-typedef TestCase* (*TestCaseFactory)();
+using TestCaseFactory = TestCase* (*)();
 
 class Runner {
 public:
@@ -152,37 +148,33 @@
   bool runAllTest(bool printSummary) const;
 
   /// Returns the number of test case in the suite
-  unsigned int testCount() const;
+  size_t testCount() const;
 
   /// Returns the name of the test case at the specified index
-  std::string testNameAt(unsigned int index) const;
+  Json::String testNameAt(size_t index) const;
 
   /// Runs the test case at the specified index using the specified TestResult
-  void runTestAt(unsigned int index, TestResult& result) const;
+  void runTestAt(size_t index, TestResult& result) const;
 
   static void printUsage(const char* appName);
 
 private: // prevents copy construction and assignment
-  Runner(const Runner& other);
-  Runner& operator=(const Runner& other);
+  Runner(const Runner& other) = delete;
+  Runner& operator=(const Runner& other) = delete;
 
 private:
   void listTests() const;
-  bool testIndex(const std::string& testName, unsigned int& index) const;
+  bool testIndex(const Json::String& testName, size_t& indexOut) const;
   static void preventDialogOnCrash();
 
 private:
-  typedef std::deque<TestCaseFactory> Factories;
+  using Factories = std::deque<TestCaseFactory>;
   Factories tests_;
 };
 
 template <typename T, typename U>
-TestResult& checkEqual(TestResult& result,
-                       const T& expected,
-                       const U& actual,
-                       const char* file,
-                       unsigned int line,
-                       const char* expr) {
+TestResult& checkEqual(TestResult& result, T expected, U actual,
+                       const char* file, unsigned int line, const char* expr) {
   if (static_cast<U>(expected) != actual) {
     result.addFailure(file, line, expr);
     result << "Expected: " << static_cast<U>(expected) << "\n";
@@ -191,12 +183,15 @@
   return result;
 }
 
-TestResult& checkStringEqual(TestResult& result,
-                             const std::string& expected,
-                             const std::string& actual,
-                             const char* file,
-                             unsigned int line,
-                             const char* expr);
+Json::String ToJsonString(const char* toConvert);
+Json::String ToJsonString(Json::String in);
+#if JSONCPP_USING_SECURE_MEMORY
+Json::String ToJsonString(std::string in);
+#endif
+
+TestResult& checkStringEqual(TestResult& result, const Json::String& expected,
+                             const Json::String& actual, const char* file,
+                             unsigned int line, const char* expr);
 
 } // namespace JsonTest
 
@@ -206,55 +201,46 @@
 #define JSONTEST_ASSERT(expr)                                                  \
   if (expr) {                                                                  \
   } else                                                                       \
-  result_->addFailure(__FILE__, __LINE__, #expr)
+    result_->addFailure(__FILE__, __LINE__, #expr)
 
 /// \brief Asserts that the given predicate is true.
 /// The predicate may do other assertions and be a member function of the
 /// fixture.
 #define JSONTEST_ASSERT_PRED(expr)                                             \
-  {                                                                            \
+  do {                                                                         \
     JsonTest::PredicateContext _minitest_Context = {                           \
-      result_->predicateId_, __FILE__, __LINE__, #expr                         \
-    };                                                                         \
+        result_->predicateId_, __FILE__, __LINE__, #expr, NULL, NULL};         \
     result_->predicateStackTail_->next_ = &_minitest_Context;                  \
     result_->predicateId_ += 1;                                                \
     result_->predicateStackTail_ = &_minitest_Context;                         \
     (expr);                                                                    \
     result_->popPredicateContext();                                            \
-  }
+  } while (0)
 
 /// \brief Asserts that two values are equals.
 #define JSONTEST_ASSERT_EQUAL(expected, actual)                                \
-  JsonTest::checkEqual(*result_,                                               \
-                       expected,                                               \
-                       actual,                                                 \
-                       __FILE__,                                               \
-                       __LINE__,                                               \
+  JsonTest::checkEqual(*result_, expected, actual, __FILE__, __LINE__,         \
                        #expected " == " #actual)
 
 /// \brief Asserts that two values are equals.
 #define JSONTEST_ASSERT_STRING_EQUAL(expected, actual)                         \
-  JsonTest::checkStringEqual(*result_,                                         \
-                             std::string(expected),                            \
-                             std::string(actual),                              \
-                             __FILE__,                                         \
-                             __LINE__,                                         \
-                             #expected " == " #actual)
+  JsonTest::checkStringEqual(*result_, JsonTest::ToJsonString(expected),       \
+                             JsonTest::ToJsonString(actual), __FILE__,         \
+                             __LINE__, #expected " == " #actual)
 
 /// \brief Asserts that a given expression throws an exception
 #define JSONTEST_ASSERT_THROWS(expr)                                           \
-  {                                                                            \
+  do {                                                                         \
     bool _threw = false;                                                       \
     try {                                                                      \
       expr;                                                                    \
-    }                                                                          \
-    catch (...) {                                                              \
+    } catch (...) {                                                            \
       _threw = true;                                                           \
     }                                                                          \
     if (!_threw)                                                               \
-      result_->addFailure(                                                     \
-          __FILE__, __LINE__, "expected exception thrown: " #expr);            \
-  }
+      result_->addFailure(__FILE__, __LINE__,                                  \
+                          "expected exception thrown: " #expr);                \
+  } while (0)
 
 /// \brief Begin a fixture test case.
 #define JSONTEST_FIXTURE(FixtureType, name)                                    \
@@ -264,9 +250,9 @@
       return new Test##FixtureType##name();                                    \
     }                                                                          \
                                                                                \
-  public: /* overidden from TestCase */                                        \
-    virtual const char* testName() const { return #FixtureType "/" #name; }    \
-    virtual void runTestCase();                                                \
+  public: /* overridden from TestCase */                                       \
+    const char* testName() const override { return #FixtureType "/" #name; }   \
+    void runTestCase() override;                                               \
   };                                                                           \
                                                                                \
   void Test##FixtureType##name::runTestCase()
@@ -277,4 +263,26 @@
 #define JSONTEST_REGISTER_FIXTURE(runner, FixtureType, name)                   \
   (runner).add(JSONTEST_FIXTURE_FACTORY(FixtureType, name))
 
+/// \brief Begin a fixture test case.
+#define JSONTEST_FIXTURE_V2(FixtureType, name, collections)                    \
+  class Test##FixtureType##name : public FixtureType {                         \
+  public:                                                                      \
+    static JsonTest::TestCase* factory() {                                     \
+      return new Test##FixtureType##name();                                    \
+    }                                                                          \
+    static bool collect() {                                                    \
+      (collections).push_back(JSONTEST_FIXTURE_FACTORY(FixtureType, name));    \
+      return true;                                                             \
+    }                                                                          \
+                                                                               \
+  public: /* overridden from TestCase */                                       \
+    const char* testName() const override { return #FixtureType "/" #name; }   \
+    void runTestCase() override;                                               \
+  };                                                                           \
+                                                                               \
+  static bool test##FixtureType##name##collect =                               \
+      Test##FixtureType##name::collect();                                      \
+                                                                               \
+  void Test##FixtureType##name::runTestCase()
+
 #endif // ifndef JSONTEST_H_INCLUDED
diff --git a/src/test_lib_json/main.cpp b/src/test_lib_json/main.cpp
index 13fc21d..991c247 100644
--- a/src/test_lib_json/main.cpp
+++ b/src/test_lib_json/main.cpp
@@ -1,12 +1,31 @@
-// Copyright 2007-2010 Baptiste Lepilleur
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
 // Distributed under MIT license, or public domain if desired and
 // recognized in your jurisdiction.
 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
 
+#if defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#elif defined(_MSC_VER)
+#pragma warning(disable : 4996)
+#endif
+
+#include "fuzz.h"
 #include "jsontest.h"
+#include <cmath>
+#include <cstring>
+#include <functional>
+#include <iomanip>
+#include <iostream>
+#include <iterator>
 #include <json/config.h>
 #include <json/json.h>
-#include <stdexcept>
+#include <limits>
+#include <memory>
+#include <sstream>
+#include <string>
+
+using CharReaderPtr = std::unique_ptr<Json::CharReader>;
 
 // Make numeric limits more convenient to talk about.
 // Assumes int type in 32 bits.
@@ -17,8 +36,8 @@
 #define kint64min Json::Value::minInt64
 #define kuint64max Json::Value::maxUInt64
 
-static const double kdint64max = double(kint64max);
-static const float kfint64max = float(kint64max);
+// static const double kdint64max = double(kint64max);
+// static const float kfint64max = float(kint64max);
 static const float kfint32max = float(kint32max);
 static const float kfuint32max = float(kuint32max);
 
@@ -35,33 +54,33 @@
 #else  // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
 static inline double uint64ToDouble(Json::UInt64 value) {
   return static_cast<double>(Json::Int64(value / 2)) * 2.0 +
-         Json::Int64(value & 1);
+         static_cast<double>(Json::Int64(value & 1));
 }
 #endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
 
+// local_ is the collection for the testcases in this code file.
+static std::deque<JsonTest::TestCaseFactory> local_;
+#define JSONTEST_FIXTURE_LOCAL(FixtureType, name)                              \
+  JSONTEST_FIXTURE_V2(FixtureType, name, local_)
+
 struct ValueTest : JsonTest::TestCase {
   Json::Value null_;
-  Json::Value emptyArray_;
-  Json::Value emptyObject_;
-  Json::Value integer_;
-  Json::Value unsignedInteger_;
-  Json::Value smallUnsignedInteger_;
-  Json::Value real_;
-  Json::Value float_;
+  Json::Value emptyArray_{Json::arrayValue};
+  Json::Value emptyObject_{Json::objectValue};
+  Json::Value integer_{123456789};
+  Json::Value unsignedInteger_{34567890};
+  Json::Value smallUnsignedInteger_{Json::Value::UInt(Json::Value::maxInt)};
+  Json::Value real_{1234.56789};
+  Json::Value float_{0.00390625f};
   Json::Value array1_;
   Json::Value object1_;
-  Json::Value emptyString_;
-  Json::Value string1_;
-  Json::Value string_;
-  Json::Value true_;
-  Json::Value false_;
+  Json::Value emptyString_{""};
+  Json::Value string1_{"a"};
+  Json::Value string_{"sometext with space"};
+  Json::Value true_{true};
+  Json::Value false_{false};
 
-  ValueTest()
-      : emptyArray_(Json::arrayValue), emptyObject_(Json::objectValue),
-        integer_(123456789), unsignedInteger_(34567890u),
-        smallUnsignedInteger_(Json::Value::UInt(Json::Value::maxInt)),
-        real_(1234.56789), float_(0.00390625f), emptyString_(""), string1_("a"),
-        string_("sometext with space"), true_(true), false_(false) {
+  ValueTest() {
     array1_.append(1234);
     object1_["id"] = 1234;
   }
@@ -70,19 +89,19 @@
     /// Initialize all checks to \c false by default.
     IsCheck();
 
-    bool isObject_;
-    bool isArray_;
-    bool isBool_;
-    bool isString_;
-    bool isNull_;
+    bool isObject_{false};
+    bool isArray_{false};
+    bool isBool_{false};
+    bool isString_{false};
+    bool isNull_{false};
 
-    bool isInt_;
-    bool isInt64_;
-    bool isUInt_;
-    bool isUInt64_;
-    bool isIntegral_;
-    bool isDouble_;
-    bool isNumeric_;
+    bool isInt_{false};
+    bool isInt64_{false};
+    bool isUInt_{false};
+    bool isUInt64_{false};
+    bool isIntegral_{false};
+    bool isDouble_{false};
+    bool isNumeric_{false};
   };
 
   void checkConstMemberCount(const Json::Value& value,
@@ -98,54 +117,52 @@
 
   /// Normalize the representation of floating-point number by stripped leading
   /// 0 in exponent.
-  static std::string normalizeFloatingPointStr(const std::string& s);
+  static Json::String normalizeFloatingPointStr(const Json::String& s);
 };
 
-std::string ValueTest::normalizeFloatingPointStr(const std::string& s) {
-  std::string::size_type index = s.find_last_of("eE");
-  if (index != std::string::npos) {
-    std::string::size_type hasSign =
-        (s[index + 1] == '+' || s[index + 1] == '-') ? 1 : 0;
-    std::string::size_type exponentStartIndex = index + 1 + hasSign;
-    std::string normalized = s.substr(0, exponentStartIndex);
-    std::string::size_type indexDigit =
-        s.find_first_not_of('0', exponentStartIndex);
-    std::string exponent = "0";
-    if (indexDigit !=
-        std::string::npos) // There is an exponent different from 0
-    {
-      exponent = s.substr(indexDigit);
-    }
-    return normalized + exponent;
+Json::String ValueTest::normalizeFloatingPointStr(const Json::String& s) {
+  auto index = s.find_last_of("eE");
+  if (index == s.npos)
+    return s;
+  std::size_t signWidth = (s[index + 1] == '+' || s[index + 1] == '-') ? 1 : 0;
+  auto exponentStartIndex = index + 1 + signWidth;
+  Json::String normalized = s.substr(0, exponentStartIndex);
+  auto indexDigit = s.find_first_not_of('0', exponentStartIndex);
+  Json::String exponent = "0";
+  if (indexDigit != s.npos) { // nonzero exponent
+    exponent = s.substr(indexDigit);
   }
-  return s;
+  return normalized + exponent;
 }
 
-JSONTEST_FIXTURE(ValueTest, checkNormalizeFloatingPointStr) {
-  JSONTEST_ASSERT_STRING_EQUAL("0.0", normalizeFloatingPointStr("0.0"));
-  JSONTEST_ASSERT_STRING_EQUAL("0e0", normalizeFloatingPointStr("0e0"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234.0", normalizeFloatingPointStr("1234.0"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234.0e0",
-                               normalizeFloatingPointStr("1234.0e0"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234.0e+0",
-                               normalizeFloatingPointStr("1234.0e+0"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e-1", normalizeFloatingPointStr("1234e-1"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e10", normalizeFloatingPointStr("1234e10"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e10",
-                               normalizeFloatingPointStr("1234e010"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e+10",
-                               normalizeFloatingPointStr("1234e+010"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e-10",
-                               normalizeFloatingPointStr("1234e-010"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e+100",
-                               normalizeFloatingPointStr("1234e+100"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e-100",
-                               normalizeFloatingPointStr("1234e-100"));
-  JSONTEST_ASSERT_STRING_EQUAL("1234e+1",
-                               normalizeFloatingPointStr("1234e+001"));
+JSONTEST_FIXTURE_LOCAL(ValueTest, checkNormalizeFloatingPointStr) {
+  struct TestData {
+    std::string in;
+    std::string out;
+  } const testData[] = {
+      {"0.0", "0.0"},
+      {"0e0", "0e0"},
+      {"1234.0", "1234.0"},
+      {"1234.0e0", "1234.0e0"},
+      {"1234.0e-1", "1234.0e-1"},
+      {"1234.0e+0", "1234.0e+0"},
+      {"1234.0e+001", "1234.0e+1"},
+      {"1234e-1", "1234e-1"},
+      {"1234e+000", "1234e+0"},
+      {"1234e+001", "1234e+1"},
+      {"1234e10", "1234e10"},
+      {"1234e010", "1234e10"},
+      {"1234e+010", "1234e+10"},
+      {"1234e-010", "1234e-10"},
+      {"1234e+100", "1234e+100"},
+      {"1234e-100", "1234e-100"},
+  };
+  for (const auto& td : testData) {
+    JSONTEST_ASSERT_STRING_EQUAL(normalizeFloatingPointStr(td.in), td.out);
+  }
 }
 
-JSONTEST_FIXTURE(ValueTest, memberCount) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, memberCount) {
   JSONTEST_ASSERT_PRED(checkMemberCount(emptyArray_, 0));
   JSONTEST_ASSERT_PRED(checkMemberCount(emptyObject_, 0));
   JSONTEST_ASSERT_PRED(checkMemberCount(array1_, 1));
@@ -158,9 +175,12 @@
   JSONTEST_ASSERT_PRED(checkMemberCount(emptyString_, 0));
   JSONTEST_ASSERT_PRED(checkMemberCount(string_, 0));
   JSONTEST_ASSERT_PRED(checkMemberCount(true_, 0));
+  JSONTEST_ASSERT_PRED(checkMemberCount(false_, 0));
+  JSONTEST_ASSERT_PRED(checkMemberCount(string1_, 0));
+  JSONTEST_ASSERT_PRED(checkMemberCount(float_, 0));
 }
 
-JSONTEST_FIXTURE(ValueTest, objects) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, objects) {
   // Types
   IsCheck checks;
   checks.isObject_ = true;
@@ -192,15 +212,71 @@
   JSONTEST_ASSERT_EQUAL(Json::Value(1234), constObject["id"]);
   JSONTEST_ASSERT_EQUAL(Json::Value(), constObject["unknown id"]);
 
+  // Access through find()
+  const char idKey[] = "id";
+  const Json::Value* foundId = object1_.find(idKey, idKey + strlen(idKey));
+  JSONTEST_ASSERT(foundId != nullptr);
+  JSONTEST_ASSERT_EQUAL(Json::Value(1234), *foundId);
+
+  const char unknownIdKey[] = "unknown id";
+  const Json::Value* foundUnknownId =
+      object1_.find(unknownIdKey, unknownIdKey + strlen(unknownIdKey));
+  JSONTEST_ASSERT_EQUAL(nullptr, foundUnknownId);
+
+  // Access through demand()
+  const char yetAnotherIdKey[] = "yet another id";
+  const Json::Value* foundYetAnotherId =
+      object1_.find(yetAnotherIdKey, yetAnotherIdKey + strlen(yetAnotherIdKey));
+  JSONTEST_ASSERT_EQUAL(nullptr, foundYetAnotherId);
+  Json::Value* demandedYetAnotherId = object1_.demand(
+      yetAnotherIdKey, yetAnotherIdKey + strlen(yetAnotherIdKey));
+  JSONTEST_ASSERT(demandedYetAnotherId != nullptr);
+  *demandedYetAnotherId = "baz";
+
+  JSONTEST_ASSERT_EQUAL(Json::Value("baz"), object1_["yet another id"]);
+
   // Access through non-const reference
   JSONTEST_ASSERT_EQUAL(Json::Value(1234), object1_["id"]);
   JSONTEST_ASSERT_EQUAL(Json::Value(), object1_["unknown id"]);
 
   object1_["some other id"] = "foo";
   JSONTEST_ASSERT_EQUAL(Json::Value("foo"), object1_["some other id"]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("foo"), object1_["some other id"]);
+
+  // Remove.
+  Json::Value got;
+  bool did;
+  did = object1_.removeMember("some other id", &got);
+  JSONTEST_ASSERT_EQUAL(Json::Value("foo"), got);
+  JSONTEST_ASSERT_EQUAL(true, did);
+  got = Json::Value("bar");
+  did = object1_.removeMember("some other id", &got);
+  JSONTEST_ASSERT_EQUAL(Json::Value("bar"), got);
+  JSONTEST_ASSERT_EQUAL(false, did);
+
+  object1_["some other id"] = "foo";
+  Json::Value* gotPtr = nullptr;
+  did = object1_.removeMember("some other id", gotPtr);
+  JSONTEST_ASSERT_EQUAL(nullptr, gotPtr);
+  JSONTEST_ASSERT_EQUAL(true, did);
+
+  // Using other removeMember interfaces, the test idea is the same as above.
+  object1_["some other id"] = "foo";
+  const Json::String key("some other id");
+  did = object1_.removeMember(key, &got);
+  JSONTEST_ASSERT_EQUAL(Json::Value("foo"), got);
+  JSONTEST_ASSERT_EQUAL(true, did);
+  got = Json::Value("bar");
+  did = object1_.removeMember(key, &got);
+  JSONTEST_ASSERT_EQUAL(Json::Value("bar"), got);
+  JSONTEST_ASSERT_EQUAL(false, did);
+
+  object1_["some other id"] = "foo";
+  object1_.removeMember(key);
+  JSONTEST_ASSERT_EQUAL(Json::nullValue, object1_[key]);
 }
 
-JSONTEST_FIXTURE(ValueTest, arrays) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, arrays) {
   const unsigned int index0 = 0;
 
   // Types
@@ -240,9 +316,125 @@
   array1_[2] = Json::Value(17);
   JSONTEST_ASSERT_EQUAL(Json::Value(), array1_[1]);
   JSONTEST_ASSERT_EQUAL(Json::Value(17), array1_[2]);
+  Json::Value got;
+  JSONTEST_ASSERT_EQUAL(true, array1_.removeIndex(2, &got));
+  JSONTEST_ASSERT_EQUAL(Json::Value(17), got);
+  JSONTEST_ASSERT_EQUAL(false, array1_.removeIndex(2, &got)); // gone now
+}
+JSONTEST_FIXTURE_LOCAL(ValueTest, resizeArray) {
+  Json::Value array;
+  {
+    for (Json::ArrayIndex i = 0; i < 10; i++)
+      array[i] = i;
+    JSONTEST_ASSERT_EQUAL(array.size(), 10);
+    // The length set is greater than the length of the array.
+    array.resize(15);
+    JSONTEST_ASSERT_EQUAL(array.size(), 15);
+
+    // The length set is less than the length of the array.
+    array.resize(5);
+    JSONTEST_ASSERT_EQUAL(array.size(), 5);
+
+    // The length of the array is set to 0.
+    array.resize(0);
+    JSONTEST_ASSERT_EQUAL(array.size(), 0);
+  }
+  {
+    for (Json::ArrayIndex i = 0; i < 10; i++)
+      array[i] = i;
+    JSONTEST_ASSERT_EQUAL(array.size(), 10);
+    array.clear();
+    JSONTEST_ASSERT_EQUAL(array.size(), 0);
+  }
+}
+JSONTEST_FIXTURE_LOCAL(ValueTest, getArrayValue) {
+  Json::Value array;
+  for (Json::ArrayIndex i = 0; i < 5; i++)
+    array[i] = i;
+
+  JSONTEST_ASSERT_EQUAL(array.size(), 5);
+  const Json::Value defaultValue(10);
+  Json::ArrayIndex index = 0;
+  for (; index <= 4; index++)
+    JSONTEST_ASSERT_EQUAL(index, array.get(index, defaultValue).asInt());
+
+  index = 4;
+  JSONTEST_ASSERT_EQUAL(array.isValidIndex(index), true);
+  index = 5;
+  JSONTEST_ASSERT_EQUAL(array.isValidIndex(index), false);
+  JSONTEST_ASSERT_EQUAL(defaultValue, array.get(index, defaultValue));
+  JSONTEST_ASSERT_EQUAL(array.isValidIndex(index), false);
+}
+JSONTEST_FIXTURE_LOCAL(ValueTest, arrayIssue252) {
+  int count = 5;
+  Json::Value root;
+  Json::Value item;
+  root["array"] = Json::Value::nullSingleton();
+  for (int i = 0; i < count; i++) {
+    item["a"] = i;
+    item["b"] = i;
+    root["array"][i] = item;
+  }
+  // JSONTEST_ASSERT_EQUAL(5, root["array"].size());
 }
 
-JSONTEST_FIXTURE(ValueTest, null) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, arrayInsertAtRandomIndex) {
+  Json::Value array;
+  const Json::Value str0("index2");
+  const Json::Value str1("index3");
+  array.append("index0"); // append rvalue
+  array.append("index1");
+  array.append(str0); // append lvalue
+
+  std::vector<Json::Value*> vec; // storage value address for checking
+  for (Json::ArrayIndex i = 0; i < 3; i++) {
+    vec.push_back(&array[i]);
+  }
+  JSONTEST_ASSERT_EQUAL(Json::Value("index0"), array[0]); // check append
+  JSONTEST_ASSERT_EQUAL(Json::Value("index1"), array[1]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index2"), array[2]);
+
+  // insert lvalue at the head
+  JSONTEST_ASSERT(array.insert(0, str1));
+  JSONTEST_ASSERT_EQUAL(Json::Value("index3"), array[0]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index0"), array[1]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index1"), array[2]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index2"), array[3]);
+  // checking address
+  for (Json::ArrayIndex i = 0; i < 3; i++) {
+    JSONTEST_ASSERT_EQUAL(vec[i], &array[i]);
+  }
+  vec.push_back(&array[3]);
+  // insert rvalue at middle
+  JSONTEST_ASSERT(array.insert(2, "index4"));
+  JSONTEST_ASSERT_EQUAL(Json::Value("index3"), array[0]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index0"), array[1]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index4"), array[2]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index1"), array[3]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index2"), array[4]);
+  // checking address
+  for (Json::ArrayIndex i = 0; i < 4; i++) {
+    JSONTEST_ASSERT_EQUAL(vec[i], &array[i]);
+  }
+  vec.push_back(&array[4]);
+  // insert rvalue at the tail
+  JSONTEST_ASSERT(array.insert(5, "index5"));
+  JSONTEST_ASSERT_EQUAL(Json::Value("index3"), array[0]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index0"), array[1]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index4"), array[2]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index1"), array[3]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index2"), array[4]);
+  JSONTEST_ASSERT_EQUAL(Json::Value("index5"), array[5]);
+  // checking address
+  for (Json::ArrayIndex i = 0; i < 5; i++) {
+    JSONTEST_ASSERT_EQUAL(vec[i], &array[i]);
+  }
+  vec.push_back(&array[5]);
+  // beyond max array size, it should not be allowed to insert into its tail
+  JSONTEST_ASSERT(!array.insert(10, "index10"));
+}
+
+JSONTEST_FIXTURE_LOCAL(ValueTest, null) {
   JSONTEST_ASSERT_EQUAL(Json::nullValue, null_.type());
 
   IsCheck checks;
@@ -265,9 +457,17 @@
   JSONTEST_ASSERT_EQUAL(0.0, null_.asDouble());
   JSONTEST_ASSERT_EQUAL(0.0, null_.asFloat());
   JSONTEST_ASSERT_STRING_EQUAL("", null_.asString());
+
+  JSONTEST_ASSERT_EQUAL(Json::Value::nullSingleton(), null_);
+
+  // Test using a Value in a boolean context (false iff null)
+  JSONTEST_ASSERT_EQUAL(null_, false);
+  JSONTEST_ASSERT_EQUAL(object1_, true);
+  JSONTEST_ASSERT_EQUAL(!null_, true);
+  JSONTEST_ASSERT_EQUAL(!object1_, false);
 }
 
-JSONTEST_FIXTURE(ValueTest, strings) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, strings) {
   JSONTEST_ASSERT_EQUAL(Json::stringValue, string1_.type());
 
   IsCheck checks;
@@ -296,7 +496,7 @@
   JSONTEST_ASSERT_STRING_EQUAL("a", string1_.asCString());
 }
 
-JSONTEST_FIXTURE(ValueTest, bools) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, bools) {
   JSONTEST_ASSERT_EQUAL(Json::booleanValue, false_.type());
 
   IsCheck checks;
@@ -338,7 +538,7 @@
   JSONTEST_ASSERT_EQUAL(0.0, false_.asFloat());
 }
 
-JSONTEST_FIXTURE(ValueTest, integers) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, integers) {
   IsCheck checks;
   Json::Value val;
 
@@ -443,7 +643,7 @@
   JSONTEST_ASSERT_EQUAL(0.0, val.asDouble());
   JSONTEST_ASSERT_EQUAL(0.0, val.asFloat());
   JSONTEST_ASSERT_EQUAL(false, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("0", val.asString());
+  JSONTEST_ASSERT_STRING_EQUAL("0.0", val.asString());
 
   // Zero (signed constructor arg)
   val = Json::Value(0);
@@ -527,7 +727,7 @@
   JSONTEST_ASSERT_EQUAL(0.0, val.asDouble());
   JSONTEST_ASSERT_EQUAL(0.0, val.asFloat());
   JSONTEST_ASSERT_EQUAL(false, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("0", val.asString());
+  JSONTEST_ASSERT_STRING_EQUAL("0.0", val.asString());
 
   // 2^20 (signed constructor arg)
   val = Json::Value(1 << 20);
@@ -610,8 +810,9 @@
   JSONTEST_ASSERT_EQUAL((1 << 20), val.asDouble());
   JSONTEST_ASSERT_EQUAL((1 << 20), val.asFloat());
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("1048576",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "1048576.0",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // -2^20
   val = Json::Value(-(1 << 20));
@@ -851,8 +1052,9 @@
   JSONTEST_ASSERT_EQUAL((Json::Int64(1) << 40), val.asDouble());
   JSONTEST_ASSERT_EQUAL((Json::Int64(1) << 40), val.asFloat());
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("1099511627776",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "1099511627776.0",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // -2^40
   val = Json::Value(-(Json::Int64(1) << 40));
@@ -923,11 +1125,12 @@
   JSONTEST_ASSERT_EQUAL(Json::UInt64(1) << 63, val.asUInt64());
   JSONTEST_ASSERT_EQUAL(Json::UInt64(1) << 63, val.asLargestUInt());
   JSONTEST_ASSERT_EQUAL(uint64ToDouble(Json::UInt64(1) << 63), val.asDouble());
-  JSONTEST_ASSERT_EQUAL(float(uint64ToDouble(Json::UInt64(1) << 63)),
-                        val.asFloat());
+  JSONTEST_ASSERT_EQUAL(float(Json::UInt64(1) << 63), val.asFloat());
+
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("9.223372036854776e+18",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "9.2233720368547758e+18",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // int64 min
   val = Json::Value(Json::Int64(kint64min));
@@ -974,11 +1177,12 @@
   JSONTEST_ASSERT_EQUAL(-9223372036854775808.0, val.asDouble());
   JSONTEST_ASSERT_EQUAL(-9223372036854775808.0, val.asFloat());
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("-9.223372036854776e+18",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "-9.2233720368547758e+18",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // 10^19
-  const Json::UInt64 ten_to_19 = static_cast<Json::UInt64>(1e19);
+  const auto ten_to_19 = static_cast<Json::UInt64>(1e19);
   val = Json::Value(Json::UInt64(ten_to_19));
 
   JSONTEST_ASSERT_EQUAL(Json::uintValue, val.type());
@@ -1021,8 +1225,9 @@
   JSONTEST_ASSERT_EQUAL(1e19, val.asDouble());
   JSONTEST_ASSERT_EQUAL(1e19, val.asFloat());
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("1e+19",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "1e+19",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // uint64 max
   val = Json::Value(Json::UInt64(kuint64max));
@@ -1065,12 +1270,13 @@
   JSONTEST_ASSERT_EQUAL(18446744073709551616.0, val.asDouble());
   JSONTEST_ASSERT_EQUAL(18446744073709551616.0, val.asFloat());
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_STRING_EQUAL("1.844674407370955e+19",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "1.8446744073709552e+19",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 #endif
 }
 
-JSONTEST_FIXTURE(ValueTest, nonIntegers) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, nonIntegers) {
   IsCheck checks;
   Json::Value val;
 
@@ -1155,8 +1361,9 @@
   JSONTEST_ASSERT_EQUAL(2147483647U, val.asLargestUInt());
 #endif
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_EQUAL("2147483647.5",
-                        normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_EQUAL(
+      "2147483647.5",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // A bit under int32 min
   val = Json::Value(kint32min - 0.5);
@@ -1180,11 +1387,12 @@
   JSONTEST_ASSERT_EQUAL(-2147483648.5, val.asDouble());
   JSONTEST_ASSERT_EQUAL(float(-2147483648.5), val.asFloat());
 #ifdef JSON_HAS_INT64
-  JSONTEST_ASSERT_EQUAL(-Json::Int64(1) << 31, val.asLargestInt());
+  JSONTEST_ASSERT_EQUAL(-(Json::Int64(1) << 31), val.asLargestInt());
 #endif
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_EQUAL("-2147483648.5",
-                        normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_EQUAL(
+      "-2147483648.5",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // A bit over uint32 max
   val = Json::Value(kuint32max + 0.5);
@@ -1213,30 +1421,35 @@
                         val.asLargestUInt());
 #endif
   JSONTEST_ASSERT_EQUAL(true, val.asBool());
-  JSONTEST_ASSERT_EQUAL("4294967295.5",
-                        normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_EQUAL(
+      "4294967295.5",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   val = Json::Value(1.2345678901234);
-  JSONTEST_ASSERT_STRING_EQUAL("1.2345678901234",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "1.2345678901234001",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // A 16-digit floating point number.
   val = Json::Value(2199023255552000.0f);
-  JSONTEST_ASSERT_EQUAL(float(2199023255552000), val.asFloat());
-  JSONTEST_ASSERT_STRING_EQUAL("2199023255552000",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_EQUAL(float(2199023255552000.0f), val.asFloat());
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "2199023255552000.0",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // A very large floating point number.
   val = Json::Value(3.402823466385289e38);
   JSONTEST_ASSERT_EQUAL(float(3.402823466385289e38), val.asFloat());
-  JSONTEST_ASSERT_STRING_EQUAL("3.402823466385289e+38",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "3.402823466385289e+38",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 
   // An even larger floating point number.
   val = Json::Value(1.2345678e300);
   JSONTEST_ASSERT_EQUAL(double(1.2345678e300), val.asDouble());
-  JSONTEST_ASSERT_STRING_EQUAL("1.2345678e+300",
-                               normalizeFloatingPointStr(val.asString()));
+  JSONTEST_ASSERT_STRING_EQUAL(
+      "1.2345678e+300",
+      normalizeFloatingPointStr(JsonTest::ToJsonString(val.asString())));
 }
 
 void ValueTest::checkConstMemberCount(const Json::Value& value,
@@ -1263,11 +1476,7 @@
   JSONTEST_ASSERT_PRED(checkConstMemberCount(value, expectedCount));
 }
 
-ValueTest::IsCheck::IsCheck()
-    : isObject_(false), isArray_(false), isBool_(false), isString_(false),
-      isNull_(false), isInt_(false), isInt64_(false), isUInt_(false),
-      isUInt64_(false), isIntegral_(false), isDouble_(false),
-      isNumeric_(false) {}
+ValueTest::IsCheck::IsCheck() = default;
 
 void ValueTest::checkIs(const Json::Value& value, const IsCheck& check) {
   JSONTEST_ASSERT_EQUAL(check.isObject_, value.isObject());
@@ -1290,31 +1499,35 @@
 #endif
 }
 
-JSONTEST_FIXTURE(ValueTest, compareNull) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareNull) {
   JSONTEST_ASSERT_PRED(checkIsEqual(Json::Value(), Json::Value()));
+  JSONTEST_ASSERT_PRED(
+      checkIsEqual(Json::Value::nullSingleton(), Json::Value()));
+  JSONTEST_ASSERT_PRED(
+      checkIsEqual(Json::Value::nullSingleton(), Json::Value::nullSingleton()));
 }
 
-JSONTEST_FIXTURE(ValueTest, compareInt) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareInt) {
   JSONTEST_ASSERT_PRED(checkIsLess(0, 10));
   JSONTEST_ASSERT_PRED(checkIsEqual(10, 10));
   JSONTEST_ASSERT_PRED(checkIsEqual(-10, -10));
   JSONTEST_ASSERT_PRED(checkIsLess(-10, 0));
 }
 
-JSONTEST_FIXTURE(ValueTest, compareUInt) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareUInt) {
   JSONTEST_ASSERT_PRED(checkIsLess(0u, 10u));
   JSONTEST_ASSERT_PRED(checkIsLess(0u, Json::Value::maxUInt));
   JSONTEST_ASSERT_PRED(checkIsEqual(10u, 10u));
 }
 
-JSONTEST_FIXTURE(ValueTest, compareDouble) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareDouble) {
   JSONTEST_ASSERT_PRED(checkIsLess(0.0, 10.0));
   JSONTEST_ASSERT_PRED(checkIsEqual(10.0, 10.0));
   JSONTEST_ASSERT_PRED(checkIsEqual(-10.0, -10.0));
   JSONTEST_ASSERT_PRED(checkIsLess(-10.0, 0.0));
 }
 
-JSONTEST_FIXTURE(ValueTest, compareString) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareString) {
   JSONTEST_ASSERT_PRED(checkIsLess("", " "));
   JSONTEST_ASSERT_PRED(checkIsLess("", "a"));
   JSONTEST_ASSERT_PRED(checkIsLess("abcd", "zyui"));
@@ -1325,13 +1538,13 @@
   JSONTEST_ASSERT_PRED(checkIsEqual("ABCD", "ABCD"));
 }
 
-JSONTEST_FIXTURE(ValueTest, compareBoolean) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareBoolean) {
   JSONTEST_ASSERT_PRED(checkIsLess(false, true));
   JSONTEST_ASSERT_PRED(checkIsEqual(false, false));
   JSONTEST_ASSERT_PRED(checkIsEqual(true, true));
 }
 
-JSONTEST_FIXTURE(ValueTest, compareArray) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareArray) {
   // array compare size then content
   Json::Value emptyArray(Json::arrayValue);
   Json::Value l1aArray;
@@ -1346,32 +1559,60 @@
   l2bArray.append(10);
   JSONTEST_ASSERT_PRED(checkIsLess(emptyArray, l1aArray));
   JSONTEST_ASSERT_PRED(checkIsLess(emptyArray, l2aArray));
-  JSONTEST_ASSERT_PRED(checkIsLess(l1aArray, l2aArray));
+  JSONTEST_ASSERT_PRED(checkIsLess(l1aArray, l1bArray));
+  JSONTEST_ASSERT_PRED(checkIsLess(l1bArray, l2aArray));
   JSONTEST_ASSERT_PRED(checkIsLess(l2aArray, l2bArray));
   JSONTEST_ASSERT_PRED(checkIsEqual(emptyArray, Json::Value(emptyArray)));
   JSONTEST_ASSERT_PRED(checkIsEqual(l1aArray, Json::Value(l1aArray)));
+  JSONTEST_ASSERT_PRED(checkIsEqual(l1bArray, Json::Value(l1bArray)));
+  JSONTEST_ASSERT_PRED(checkIsEqual(l2aArray, Json::Value(l2aArray)));
   JSONTEST_ASSERT_PRED(checkIsEqual(l2bArray, Json::Value(l2bArray)));
 }
 
-JSONTEST_FIXTURE(ValueTest, compareObject) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareObject) {
   // object compare size then content
   Json::Value emptyObject(Json::objectValue);
   Json::Value l1aObject;
   l1aObject["key1"] = 0;
   Json::Value l1bObject;
-  l1aObject["key1"] = 10;
+  l1bObject["key1"] = 10;
   Json::Value l2aObject;
   l2aObject["key1"] = 0;
   l2aObject["key2"] = 0;
+  Json::Value l2bObject;
+  l2bObject["key1"] = 10;
+  l2bObject["key2"] = 0;
   JSONTEST_ASSERT_PRED(checkIsLess(emptyObject, l1aObject));
-  JSONTEST_ASSERT_PRED(checkIsLess(emptyObject, l2aObject));
-  JSONTEST_ASSERT_PRED(checkIsLess(l1aObject, l2aObject));
+  JSONTEST_ASSERT_PRED(checkIsLess(l1aObject, l1bObject));
+  JSONTEST_ASSERT_PRED(checkIsLess(l1bObject, l2aObject));
+  JSONTEST_ASSERT_PRED(checkIsLess(l2aObject, l2bObject));
   JSONTEST_ASSERT_PRED(checkIsEqual(emptyObject, Json::Value(emptyObject)));
   JSONTEST_ASSERT_PRED(checkIsEqual(l1aObject, Json::Value(l1aObject)));
+  JSONTEST_ASSERT_PRED(checkIsEqual(l1bObject, Json::Value(l1bObject)));
   JSONTEST_ASSERT_PRED(checkIsEqual(l2aObject, Json::Value(l2aObject)));
+  JSONTEST_ASSERT_PRED(checkIsEqual(l2bObject, Json::Value(l2bObject)));
+  {
+    Json::Value aObject;
+    aObject["a"] = 10;
+    Json::Value bObject;
+    bObject["b"] = 0;
+    Json::Value cObject;
+    cObject["c"] = 20;
+    cObject["f"] = 15;
+    Json::Value dObject;
+    dObject["d"] = -2;
+    dObject["e"] = 10;
+    JSONTEST_ASSERT_PRED(checkIsLess(aObject, bObject));
+    JSONTEST_ASSERT_PRED(checkIsLess(bObject, cObject));
+    JSONTEST_ASSERT_PRED(checkIsLess(cObject, dObject));
+    JSONTEST_ASSERT_PRED(checkIsEqual(aObject, Json::Value(aObject)));
+    JSONTEST_ASSERT_PRED(checkIsEqual(bObject, Json::Value(bObject)));
+    JSONTEST_ASSERT_PRED(checkIsEqual(cObject, Json::Value(cObject)));
+    JSONTEST_ASSERT_PRED(checkIsEqual(dObject, Json::Value(dObject)));
+  }
 }
 
-JSONTEST_FIXTURE(ValueTest, compareType) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, compareType) {
   // object of different type are ordered according to their type
   JSONTEST_ASSERT_PRED(checkIsLess(Json::Value(), Json::Value(1)));
   JSONTEST_ASSERT_PRED(checkIsLess(Json::Value(1), Json::Value(1u)));
@@ -1384,6 +1625,58 @@
                                    Json::Value(Json::objectValue)));
 }
 
+JSONTEST_FIXTURE_LOCAL(ValueTest, CopyObject) {
+  Json::Value arrayVal;
+  arrayVal.append("val1");
+  arrayVal.append("val2");
+  arrayVal.append("val3");
+  Json::Value stringVal("string value");
+  Json::Value copy1, copy2;
+  {
+    Json::Value arrayCopy, stringCopy;
+    arrayCopy.copy(arrayVal);
+    stringCopy.copy(stringVal);
+    JSONTEST_ASSERT_PRED(checkIsEqual(arrayCopy, arrayVal));
+    JSONTEST_ASSERT_PRED(checkIsEqual(stringCopy, stringVal));
+    arrayCopy.append("val4");
+    JSONTEST_ASSERT(arrayCopy.size() == 4);
+    arrayVal.append("new4");
+    arrayVal.append("new5");
+    JSONTEST_ASSERT(arrayVal.size() == 5);
+    JSONTEST_ASSERT(!(arrayCopy == arrayVal));
+    stringCopy = "another string";
+    JSONTEST_ASSERT(!(stringCopy == stringVal));
+    copy1.copy(arrayCopy);
+    copy2.copy(stringCopy);
+  }
+  JSONTEST_ASSERT(arrayVal.size() == 5);
+  JSONTEST_ASSERT(stringVal == "string value");
+  JSONTEST_ASSERT(copy1.size() == 4);
+  JSONTEST_ASSERT(copy2 == "another string");
+  copy1.copy(stringVal);
+  JSONTEST_ASSERT(copy1 == "string value");
+  copy2.copy(arrayVal);
+  JSONTEST_ASSERT(copy2.size() == 5);
+  {
+    Json::Value srcObject, objectCopy, otherObject;
+    srcObject["key0"] = 10;
+    objectCopy.copy(srcObject);
+    JSONTEST_ASSERT(srcObject["key0"] == 10);
+    JSONTEST_ASSERT(objectCopy["key0"] == 10);
+    JSONTEST_ASSERT(srcObject.getMemberNames().size() == 1);
+    JSONTEST_ASSERT(objectCopy.getMemberNames().size() == 1);
+    otherObject["key1"] = 15;
+    otherObject["key2"] = 16;
+    JSONTEST_ASSERT(otherObject.getMemberNames().size() == 2);
+    objectCopy.copy(otherObject);
+    JSONTEST_ASSERT(objectCopy["key1"] == 15);
+    JSONTEST_ASSERT(objectCopy["key2"] == 16);
+    JSONTEST_ASSERT(objectCopy.getMemberNames().size() == 2);
+    otherObject["key1"] = 20;
+    JSONTEST_ASSERT(objectCopy["key1"] == 15);
+  }
+}
+
 void ValueTest::checkIsLess(const Json::Value& x, const Json::Value& y) {
   JSONTEST_ASSERT(x < y);
   JSONTEST_ASSERT(y > x);
@@ -1414,7 +1707,7 @@
   JSONTEST_ASSERT(y.compare(x) == 0);
 }
 
-JSONTEST_FIXTURE(ValueTest, typeChecksThrowExceptions) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, typeChecksThrowExceptions) {
 #if JSON_USE_EXCEPTION
 
   Json::Value intVal(1);
@@ -1480,7 +1773,7 @@
 #endif
 }
 
-JSONTEST_FIXTURE(ValueTest, offsetAccessors) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, offsetAccessors) {
   Json::Value x;
   JSONTEST_ASSERT(x.getOffsetStart() == 0);
   JSONTEST_ASSERT(x.getOffsetLimit() == 0);
@@ -1499,9 +1792,312 @@
   JSONTEST_ASSERT(y.getOffsetLimit() == 0);
 }
 
-struct WriterTest : JsonTest::TestCase {};
+JSONTEST_FIXTURE_LOCAL(ValueTest, StaticString) {
+  char mutant[] = "hello";
+  Json::StaticString ss(mutant);
+  Json::String regular(mutant);
+  mutant[1] = 'a';
+  JSONTEST_ASSERT_STRING_EQUAL("hallo", ss.c_str());
+  JSONTEST_ASSERT_STRING_EQUAL("hello", regular.c_str());
+  {
+    Json::Value root;
+    root["top"] = ss;
+    JSONTEST_ASSERT_STRING_EQUAL("hallo", root["top"].asString());
+    mutant[1] = 'u';
+    JSONTEST_ASSERT_STRING_EQUAL("hullo", root["top"].asString());
+  }
+  {
+    Json::Value root;
+    root["top"] = regular;
+    JSONTEST_ASSERT_STRING_EQUAL("hello", root["top"].asString());
+    mutant[1] = 'u';
+    JSONTEST_ASSERT_STRING_EQUAL("hello", root["top"].asString());
+  }
+}
 
-JSONTEST_FIXTURE(WriterTest, dropNullPlaceholders) {
+JSONTEST_FIXTURE_LOCAL(ValueTest, WideString) {
+  // https://github.com/open-source-parsers/jsoncpp/issues/756
+  const std::string uni = u8"\u5f0f\uff0c\u8fdb"; // "式,进"
+  std::string styled;
+  {
+    Json::Value v;
+    v["abc"] = uni;
+    styled = v.toStyledString();
+  }
+  Json::Value root;
+  {
+    JSONCPP_STRING errs;
+    std::istringstream iss(styled);
+    bool ok = parseFromStream(Json::CharReaderBuilder(), iss, &root, &errs);
+    JSONTEST_ASSERT(ok);
+    if (!ok) {
+      std::cerr << "errs: " << errs << std::endl;
+    }
+  }
+  JSONTEST_ASSERT_STRING_EQUAL(root["abc"].asString(), uni);
+}
+
+JSONTEST_FIXTURE_LOCAL(ValueTest, CommentBefore) {
+  Json::Value val; // fill val
+  val.setComment(Json::String("// this comment should appear before"),
+                 Json::commentBefore);
+  Json::StreamWriterBuilder wbuilder;
+  wbuilder.settings_["commentStyle"] = "All";
+  {
+    char const expected[] = "// this comment should appear before\nnull";
+    Json::String result = Json::writeString(wbuilder, val);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+    Json::String res2 = val.toStyledString();
+    Json::String exp2 = "\n";
+    exp2 += expected;
+    exp2 += "\n";
+    JSONTEST_ASSERT_STRING_EQUAL(exp2, res2);
+  }
+  Json::Value other = "hello";
+  val.swapPayload(other);
+  {
+    char const expected[] = "// this comment should appear before\n\"hello\"";
+    Json::String result = Json::writeString(wbuilder, val);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+    Json::String res2 = val.toStyledString();
+    Json::String exp2 = "\n";
+    exp2 += expected;
+    exp2 += "\n";
+    JSONTEST_ASSERT_STRING_EQUAL(exp2, res2);
+    JSONTEST_ASSERT_STRING_EQUAL("null\n", other.toStyledString());
+  }
+  val = "hello";
+  // val.setComment("// this comment should appear before",
+  // Json::CommentPlacement::commentBefore); Assignment over-writes comments.
+  {
+    char const expected[] = "\"hello\"";
+    Json::String result = Json::writeString(wbuilder, val);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+    Json::String res2 = val.toStyledString();
+    Json::String exp2;
+    exp2 += expected;
+    exp2 += "\n";
+    JSONTEST_ASSERT_STRING_EQUAL(exp2, res2);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(ValueTest, zeroes) {
+  char const cstr[] = "h\0i";
+  Json::String binary(cstr, sizeof(cstr)); // include trailing 0
+  JSONTEST_ASSERT_EQUAL(4U, binary.length());
+  Json::StreamWriterBuilder b;
+  {
+    Json::Value root;
+    root = binary;
+    JSONTEST_ASSERT_STRING_EQUAL(binary, root.asString());
+  }
+  {
+    char const top[] = "top";
+    Json::Value root;
+    root[top] = binary;
+    JSONTEST_ASSERT_STRING_EQUAL(binary, root[top].asString());
+    Json::Value removed;
+    bool did;
+    did = root.removeMember(top, top + sizeof(top) - 1U, &removed);
+    JSONTEST_ASSERT(did);
+    JSONTEST_ASSERT_STRING_EQUAL(binary, removed.asString());
+    did = root.removeMember(top, top + sizeof(top) - 1U, &removed);
+    JSONTEST_ASSERT(!did);
+    JSONTEST_ASSERT_STRING_EQUAL(binary, removed.asString()); // still
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(ValueTest, zeroesInKeys) {
+  char const cstr[] = "h\0i";
+  Json::String binary(cstr, sizeof(cstr)); // include trailing 0
+  JSONTEST_ASSERT_EQUAL(4U, binary.length());
+  {
+    Json::Value root;
+    root[binary] = "there";
+    JSONTEST_ASSERT_STRING_EQUAL("there", root[binary].asString());
+    JSONTEST_ASSERT(!root.isMember("h"));
+    JSONTEST_ASSERT(root.isMember(binary));
+    JSONTEST_ASSERT_STRING_EQUAL(
+        "there", root.get(binary, Json::Value::nullSingleton()).asString());
+    Json::Value removed;
+    bool did;
+    did = root.removeMember(binary.data(), binary.data() + binary.length(),
+                            &removed);
+    JSONTEST_ASSERT(did);
+    JSONTEST_ASSERT_STRING_EQUAL("there", removed.asString());
+    did = root.removeMember(binary.data(), binary.data() + binary.length(),
+                            &removed);
+    JSONTEST_ASSERT(!did);
+    JSONTEST_ASSERT_STRING_EQUAL("there", removed.asString()); // still
+    JSONTEST_ASSERT(!root.isMember(binary));
+    JSONTEST_ASSERT_STRING_EQUAL(
+        "", root.get(binary, Json::Value::nullSingleton()).asString());
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(ValueTest, specialFloats) {
+  Json::StreamWriterBuilder b;
+  b.settings_["useSpecialFloats"] = true;
+
+  Json::Value v = std::numeric_limits<double>::quiet_NaN();
+  Json::String expected = "NaN";
+  Json::String result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  v = std::numeric_limits<double>::infinity();
+  expected = "Infinity";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  v = -std::numeric_limits<double>::infinity();
+  expected = "-Infinity";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(ValueTest, precision) {
+  Json::StreamWriterBuilder b;
+  b.settings_["precision"] = 5;
+
+  Json::Value v = 100.0 / 3;
+  Json::String expected = "33.333";
+  Json::String result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  v = 0.25000000;
+  expected = "0.25";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  v = 0.2563456;
+  expected = "0.25635";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  b.settings_["precision"] = 1;
+  expected = "0.3";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  b.settings_["precision"] = 17;
+  v = 1234857476305.256345694873740545068;
+  expected = "1234857476305.2563";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  b.settings_["precision"] = 24;
+  v = 0.256345694873740545068;
+  expected = "0.25634569487374054";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  b.settings_["precision"] = 5;
+  b.settings_["precisionType"] = "decimal";
+  v = 0.256345694873740545068;
+  expected = "0.25635";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  b.settings_["precision"] = 1;
+  b.settings_["precisionType"] = "decimal";
+  v = 0.256345694873740545068;
+  expected = "0.3";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+
+  b.settings_["precision"] = 10;
+  b.settings_["precisionType"] = "decimal";
+  v = 0.23300000;
+  expected = "0.233";
+  result = Json::writeString(b, v);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+JSONTEST_FIXTURE_LOCAL(ValueTest, searchValueByPath) {
+  Json::Value root, subroot;
+  root["property1"][0] = 0;
+  root["property1"][1] = 1;
+  subroot["object"] = "object";
+  root["property2"] = subroot;
+
+  const Json::Value defaultValue("error");
+  Json::FastWriter writer;
+
+  {
+    const Json::String expected("{"
+                                "\"property1\":[0,1],"
+                                "\"property2\":{\"object\":\"object\"}"
+                                "}\n");
+    Json::String outcome = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, outcome);
+
+    // Array member exists.
+    const Json::Path path1(".property1.[%]", 1);
+    Json::Value result = path1.resolve(root);
+    JSONTEST_ASSERT_EQUAL(Json::Value(1), result);
+    result = path1.resolve(root, defaultValue);
+    JSONTEST_ASSERT_EQUAL(Json::Value(1), result);
+
+    // Array member does not exist.
+    const Json::Path path2(".property1.[2]");
+    result = path2.resolve(root);
+    JSONTEST_ASSERT_EQUAL(Json::nullValue, result);
+    result = path2.resolve(root, defaultValue);
+    JSONTEST_ASSERT_EQUAL(defaultValue, result);
+
+    // Access array path form error
+    const Json::Path path3(".property1.0");
+    result = path3.resolve(root);
+    JSONTEST_ASSERT_EQUAL(Json::nullValue, result);
+    result = path3.resolve(root, defaultValue);
+    JSONTEST_ASSERT_EQUAL(defaultValue, result);
+
+    // Object member exists.
+    const Json::Path path4(".property2.%", "object");
+    result = path4.resolve(root);
+    JSONTEST_ASSERT_EQUAL(Json::Value("object"), result);
+    result = path4.resolve(root, defaultValue);
+    JSONTEST_ASSERT_EQUAL(Json::Value("object"), result);
+
+    // Object member does not exist.
+    const Json::Path path5(".property2.hello");
+    result = path5.resolve(root);
+    JSONTEST_ASSERT_EQUAL(Json::nullValue, result);
+    result = path5.resolve(root, defaultValue);
+    JSONTEST_ASSERT_EQUAL(defaultValue, result);
+
+    // Access object path form error
+    const Json::Path path6(".property2.[0]");
+    result = path5.resolve(root);
+    JSONTEST_ASSERT_EQUAL(Json::nullValue, result);
+    result = path6.resolve(root, defaultValue);
+    JSONTEST_ASSERT_EQUAL(defaultValue, result);
+
+    // resolve will not change the value
+    outcome = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, outcome);
+  }
+  {
+    const Json::String expected("{"
+                                "\"property1\":[0,1,null],"
+                                "\"property2\":{"
+                                "\"hello\":null,"
+                                "\"object\":\"object\"}}\n");
+    Json::Path path1(".property1.[%]", 2);
+    Json::Value& value1 = path1.make(root);
+    JSONTEST_ASSERT_EQUAL(Json::nullValue, value1);
+
+    Json::Path path2(".property2.%", "hello");
+    Json::Value& value2 = path2.make(root);
+    JSONTEST_ASSERT_EQUAL(Json::nullValue, value2);
+
+    // make will change the value
+    const Json::String outcome = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, outcome);
+  }
+}
+struct FastWriterTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(FastWriterTest, dropNullPlaceholders) {
   Json::FastWriter writer;
   Json::Value nullValue;
   JSONTEST_ASSERT(writer.write(nullValue) == "null\n");
@@ -1510,128 +2106,1816 @@
   JSONTEST_ASSERT(writer.write(nullValue) == "\n");
 }
 
-struct ReaderTest : JsonTest::TestCase {};
-
-JSONTEST_FIXTURE(ReaderTest, parseWithNoErrors) {
-  Json::Reader reader;
+JSONTEST_FIXTURE_LOCAL(FastWriterTest, enableYAMLCompatibility) {
+  Json::FastWriter writer;
   Json::Value root;
-  bool ok = reader.parse("{ \"property\" : \"value\" }", root);
-  JSONTEST_ASSERT(ok);
-  JSONTEST_ASSERT(reader.getFormattedErrorMessages().size() == 0);
-  JSONTEST_ASSERT(reader.getStructuredErrors().size() == 0);
+  root["hello"] = "world";
+
+  JSONTEST_ASSERT(writer.write(root) == "{\"hello\":\"world\"}\n");
+
+  writer.enableYAMLCompatibility();
+  JSONTEST_ASSERT(writer.write(root) == "{\"hello\": \"world\"}\n");
 }
 
-JSONTEST_FIXTURE(ReaderTest, parseWithNoErrorsTestingOffsets) {
-  Json::Reader reader;
-  Json::Value root;
-  bool ok = reader.parse("{ \"property\" : [\"value\", \"value2\"], \"obj\" : "
-                         "{ \"nested\" : 123, \"bool\" : true}, \"null\" : "
-                         "null, \"false\" : false }",
-                         root);
-  JSONTEST_ASSERT(ok);
-  JSONTEST_ASSERT(reader.getFormattedErrorMessages().size() == 0);
-  JSONTEST_ASSERT(reader.getStructuredErrors().size() == 0);
-  JSONTEST_ASSERT(root["property"].getOffsetStart() == 15);
-  JSONTEST_ASSERT(root["property"].getOffsetLimit() == 34);
-  JSONTEST_ASSERT(root["property"][0].getOffsetStart() == 16);
-  JSONTEST_ASSERT(root["property"][0].getOffsetLimit() == 23);
-  JSONTEST_ASSERT(root["property"][1].getOffsetStart() == 25);
-  JSONTEST_ASSERT(root["property"][1].getOffsetLimit() == 33);
-  JSONTEST_ASSERT(root["obj"].getOffsetStart() == 44);
-  JSONTEST_ASSERT(root["obj"].getOffsetLimit() == 76);
-  JSONTEST_ASSERT(root["obj"]["nested"].getOffsetStart() == 57);
-  JSONTEST_ASSERT(root["obj"]["nested"].getOffsetLimit() == 60);
-  JSONTEST_ASSERT(root["obj"]["bool"].getOffsetStart() == 71);
-  JSONTEST_ASSERT(root["obj"]["bool"].getOffsetLimit() == 75);
-  JSONTEST_ASSERT(root["null"].getOffsetStart() == 87);
-  JSONTEST_ASSERT(root["null"].getOffsetLimit() == 91);
-  JSONTEST_ASSERT(root["false"].getOffsetStart() == 103);
-  JSONTEST_ASSERT(root["false"].getOffsetLimit() == 108);
-  JSONTEST_ASSERT(root.getOffsetStart() == 0);
-  JSONTEST_ASSERT(root.getOffsetLimit() == 110);
+JSONTEST_FIXTURE_LOCAL(FastWriterTest, omitEndingLineFeed) {
+  Json::FastWriter writer;
+  Json::Value nullValue;
+
+  JSONTEST_ASSERT(writer.write(nullValue) == "null\n");
+
+  writer.omitEndingLineFeed();
+  JSONTEST_ASSERT(writer.write(nullValue) == "null");
 }
 
-JSONTEST_FIXTURE(ReaderTest, parseWithOneError) {
-  Json::Reader reader;
+JSONTEST_FIXTURE_LOCAL(FastWriterTest, writeNumericValue) {
+  Json::FastWriter writer;
+  const Json::String expected("{"
+                              "\"emptyValue\":null,"
+                              "\"false\":false,"
+                              "\"null\":\"null\","
+                              "\"number\":-6200000000000000.0,"
+                              "\"real\":1.256,"
+                              "\"uintValue\":17"
+                              "}\n");
   Json::Value root;
-  bool ok = reader.parse("{ \"property\" :: \"value\" }", root);
+  root["emptyValue"] = Json::nullValue;
+  root["false"] = false;
+  root["null"] = "null";
+  root["number"] = -6.2e+15;
+  root["real"] = 1.256;
+  root["uintValue"] = Json::Value(17U);
+
+  const Json::String result = writer.write(root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(FastWriterTest, writeArrays) {
+  Json::FastWriter writer;
+  const Json::String expected("{"
+                              "\"property1\":[\"value1\",\"value2\"],"
+                              "\"property2\":[]"
+                              "}\n");
+  Json::Value root;
+  root["property1"][0] = "value1";
+  root["property1"][1] = "value2";
+  root["property2"] = Json::arrayValue;
+
+  const Json::String result = writer.write(root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(FastWriterTest, writeNestedObjects) {
+  Json::FastWriter writer;
+  const Json::String expected("{"
+                              "\"object1\":{"
+                              "\"bool\":true,"
+                              "\"nested\":123"
+                              "},"
+                              "\"object2\":{}"
+                              "}\n");
+  Json::Value root, child;
+  child["nested"] = 123;
+  child["bool"] = true;
+  root["object1"] = child;
+  root["object2"] = Json::objectValue;
+
+  const Json::String result = writer.write(root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+struct StyledWriterTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(StyledWriterTest, writeNumericValue) {
+  Json::StyledWriter writer;
+  const Json::String expected("{\n"
+                              "   \"emptyValue\" : null,\n"
+                              "   \"false\" : false,\n"
+                              "   \"null\" : \"null\",\n"
+                              "   \"number\" : -6200000000000000.0,\n"
+                              "   \"real\" : 1.256,\n"
+                              "   \"uintValue\" : 17\n"
+                              "}\n");
+  Json::Value root;
+  root["emptyValue"] = Json::nullValue;
+  root["false"] = false;
+  root["null"] = "null";
+  root["number"] = -6.2e+15;
+  root["real"] = 1.256;
+  root["uintValue"] = Json::Value(17U);
+
+  const Json::String result = writer.write(root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledWriterTest, writeArrays) {
+  Json::StyledWriter writer;
+  const Json::String expected("{\n"
+                              "   \"property1\" : [ \"value1\", \"value2\" ],\n"
+                              "   \"property2\" : []\n"
+                              "}\n");
+  Json::Value root;
+  root["property1"][0] = "value1";
+  root["property1"][1] = "value2";
+  root["property2"] = Json::arrayValue;
+
+  const Json::String result = writer.write(root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledWriterTest, writeNestedObjects) {
+  Json::StyledWriter writer;
+  const Json::String expected("{\n"
+                              "   \"object1\" : {\n"
+                              "      \"bool\" : true,\n"
+                              "      \"nested\" : 123\n"
+                              "   },\n"
+                              "   \"object2\" : {}\n"
+                              "}\n");
+  Json::Value root, child;
+  child["nested"] = 123;
+  child["bool"] = true;
+  root["object1"] = child;
+  root["object2"] = Json::objectValue;
+
+  const Json::String result = writer.write(root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledWriterTest, multiLineArray) {
+  Json::StyledWriter writer;
+  {
+    // Array member has more than 20 print effect rendering lines
+    const Json::String expected("[\n   "
+                                "0,\n   1,\n   2,\n   "
+                                "3,\n   4,\n   5,\n   "
+                                "6,\n   7,\n   8,\n   "
+                                "9,\n   10,\n   11,\n   "
+                                "12,\n   13,\n   14,\n   "
+                                "15,\n   16,\n   17,\n   "
+                                "18,\n   19,\n   20\n]\n");
+    Json::Value root;
+    for (Json::ArrayIndex i = 0; i < 21; i++)
+      root[i] = i;
+    const Json::String result = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+  {
+    // Array members do not exceed 21 print effects to render a single line
+    const Json::String expected("[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]\n");
+    Json::Value root;
+    for (Json::ArrayIndex i = 0; i < 10; i++)
+      root[i] = i;
+    const Json::String result = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledWriterTest, writeValueWithComment) {
+  Json::StyledWriter writer;
+  {
+    const Json::String expected("\n//commentBeforeValue\n\"hello\"\n");
+    Json::Value root = "hello";
+    root.setComment(Json::String("//commentBeforeValue"), Json::commentBefore);
+    const Json::String result = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+  {
+    const Json::String expected("\"hello\" //commentAfterValueOnSameLine\n");
+    Json::Value root = "hello";
+    root.setComment(Json::String("//commentAfterValueOnSameLine"),
+                    Json::commentAfterOnSameLine);
+    const Json::String result = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+  {
+    const Json::String expected("\"hello\"\n//commentAfter\n\n");
+    Json::Value root = "hello";
+    root.setComment(Json::String("//commentAfter"), Json::commentAfter);
+    const Json::String result = writer.write(root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+}
+
+struct StyledStreamWriterTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(StyledStreamWriterTest, writeNumericValue) {
+  Json::StyledStreamWriter writer;
+  const Json::String expected("{\n"
+                              "\t\"emptyValue\" : null,\n"
+                              "\t\"false\" : false,\n"
+                              "\t\"null\" : \"null\",\n"
+                              "\t\"number\" : -6200000000000000.0,\n"
+                              "\t\"real\" : 1.256,\n"
+                              "\t\"uintValue\" : 17\n"
+                              "}\n");
+
+  Json::Value root;
+  root["emptyValue"] = Json::nullValue;
+  root["false"] = false;
+  root["null"] = "null";
+  root["number"] = -6.2e+15; // big float number
+  root["real"] = 1.256;      // float number
+  root["uintValue"] = Json::Value(17U);
+
+  Json::OStringStream sout;
+  writer.write(sout, root);
+  const Json::String result = sout.str();
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledStreamWriterTest, writeArrays) {
+  Json::StyledStreamWriter writer;
+  const Json::String expected("{\n"
+                              "\t\"property1\" : [ \"value1\", \"value2\" ],\n"
+                              "\t\"property2\" : []\n"
+                              "}\n");
+  Json::Value root;
+  root["property1"][0] = "value1";
+  root["property1"][1] = "value2";
+  root["property2"] = Json::arrayValue;
+
+  Json::OStringStream sout;
+  writer.write(sout, root);
+  const Json::String result = sout.str();
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledStreamWriterTest, writeNestedObjects) {
+  Json::StyledStreamWriter writer;
+  const Json::String expected("{\n"
+                              "\t\"object1\" : \n"
+                              "\t"
+                              "{\n"
+                              "\t\t\"bool\" : true,\n"
+                              "\t\t\"nested\" : 123\n"
+                              "\t},\n"
+                              "\t\"object2\" : {}\n"
+                              "}\n");
+  Json::Value root, child;
+  child["nested"] = 123;
+  child["bool"] = true;
+  root["object1"] = child;
+  root["object2"] = Json::objectValue;
+
+  Json::OStringStream sout;
+  writer.write(sout, root);
+  const Json::String result = sout.str();
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledStreamWriterTest, multiLineArray) {
+  {
+    // Array member has more than 20 print effect rendering lines
+    const Json::String expected("[\n\t0,"
+                                "\n\t1,"
+                                "\n\t2,"
+                                "\n\t3,"
+                                "\n\t4,"
+                                "\n\t5,"
+                                "\n\t6,"
+                                "\n\t7,"
+                                "\n\t8,"
+                                "\n\t9,"
+                                "\n\t10,"
+                                "\n\t11,"
+                                "\n\t12,"
+                                "\n\t13,"
+                                "\n\t14,"
+                                "\n\t15,"
+                                "\n\t16,"
+                                "\n\t17,"
+                                "\n\t18,"
+                                "\n\t19,"
+                                "\n\t20\n]\n");
+    Json::StyledStreamWriter writer;
+    Json::Value root;
+    for (Json::ArrayIndex i = 0; i < 21; i++)
+      root[i] = i;
+    Json::OStringStream sout;
+    writer.write(sout, root);
+    const Json::String result = sout.str();
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+  {
+    Json::StyledStreamWriter writer;
+    // Array members do not exceed 21 print effects to render a single line
+    const Json::String expected("[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]\n");
+    Json::Value root;
+    for (Json::ArrayIndex i = 0; i < 10; i++)
+      root[i] = i;
+    Json::OStringStream sout;
+    writer.write(sout, root);
+    const Json::String result = sout.str();
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(StyledStreamWriterTest, writeValueWithComment) {
+  Json::StyledStreamWriter writer("\t");
+  {
+    const Json::String expected("//commentBeforeValue\n\"hello\"\n");
+    Json::Value root = "hello";
+    Json::OStringStream sout;
+    root.setComment(Json::String("//commentBeforeValue"), Json::commentBefore);
+    writer.write(sout, root);
+    const Json::String result = sout.str();
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+  {
+    const Json::String expected("\"hello\" //commentAfterValueOnSameLine\n");
+    Json::Value root = "hello";
+    Json::OStringStream sout;
+    root.setComment(Json::String("//commentAfterValueOnSameLine"),
+                    Json::commentAfterOnSameLine);
+    writer.write(sout, root);
+    const Json::String result = sout.str();
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+  {
+    const Json::String expected("\"hello\"\n//commentAfter\n");
+    Json::Value root = "hello";
+    Json::OStringStream sout;
+    root.setComment(Json::String("//commentAfter"), Json::commentAfter);
+    writer.write(sout, root);
+    const Json::String result = sout.str();
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+}
+
+struct StreamWriterTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, writeNumericValue) {
+  Json::StreamWriterBuilder writer;
+  const Json::String expected("{\n"
+                              "\t\"emptyValue\" : null,\n"
+                              "\t\"false\" : false,\n"
+                              "\t\"null\" : \"null\",\n"
+                              "\t\"number\" : -6200000000000000.0,\n"
+                              "\t\"real\" : 1.256,\n"
+                              "\t\"uintValue\" : 17\n"
+                              "}");
+  Json::Value root;
+  root["emptyValue"] = Json::nullValue;
+  root["false"] = false;
+  root["null"] = "null";
+  root["number"] = -6.2e+15;
+  root["real"] = 1.256;
+  root["uintValue"] = Json::Value(17U);
+
+  const Json::String result = Json::writeString(writer, root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, writeArrays) {
+  Json::StreamWriterBuilder writer;
+  const Json::String expected("{\n"
+                              "\t\"property1\" : \n"
+                              "\t[\n"
+                              "\t\t\"value1\",\n"
+                              "\t\t\"value2\"\n"
+                              "\t],\n"
+                              "\t\"property2\" : []\n"
+                              "}");
+
+  Json::Value root;
+  root["property1"][0] = "value1";
+  root["property1"][1] = "value2";
+  root["property2"] = Json::arrayValue;
+
+  const Json::String result = Json::writeString(writer, root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, writeNestedObjects) {
+  Json::StreamWriterBuilder writer;
+  const Json::String expected("{\n"
+                              "\t\"object1\" : \n"
+                              "\t{\n"
+                              "\t\t\"bool\" : true,\n"
+                              "\t\t\"nested\" : 123\n"
+                              "\t},\n"
+                              "\t\"object2\" : {}\n"
+                              "}");
+
+  Json::Value root, child;
+  child["nested"] = 123;
+  child["bool"] = true;
+  root["object1"] = child;
+  root["object2"] = Json::objectValue;
+
+  const Json::String result = Json::writeString(writer, root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, multiLineArray) {
+  Json::StreamWriterBuilder wb;
+  wb.settings_["commentStyle"] = "None";
+  {
+    // When wb.settings_["commentStyle"] = "None", the effect of
+    // printing multiple lines will be displayed when there are
+    // more than 20 array members.
+    const Json::String expected("[\n\t0,"
+                                "\n\t1,"
+                                "\n\t2,"
+                                "\n\t3,"
+                                "\n\t4,"
+                                "\n\t5,"
+                                "\n\t6,"
+                                "\n\t7,"
+                                "\n\t8,"
+                                "\n\t9,"
+                                "\n\t10,"
+                                "\n\t11,"
+                                "\n\t12,"
+                                "\n\t13,"
+                                "\n\t14,"
+                                "\n\t15,"
+                                "\n\t16,"
+                                "\n\t17,"
+                                "\n\t18,"
+                                "\n\t19,"
+                                "\n\t20\n]");
+    Json::Value root;
+    for (Json::ArrayIndex i = 0; i < 21; i++)
+      root[i] = i;
+    const Json::String result = Json::writeString(wb, root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+  {
+    // Array members do not exceed 21 print effects to render a single line
+    const Json::String expected("[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]");
+    Json::Value root;
+    for (Json::ArrayIndex i = 0; i < 10; i++)
+      root[i] = i;
+    const Json::String result = Json::writeString(wb, root);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, dropNullPlaceholders) {
+  Json::StreamWriterBuilder b;
+  Json::Value nullValue;
+  b.settings_["dropNullPlaceholders"] = false;
+  JSONTEST_ASSERT(Json::writeString(b, nullValue) == "null");
+  b.settings_["dropNullPlaceholders"] = true;
+  JSONTEST_ASSERT(Json::writeString(b, nullValue).empty());
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, enableYAMLCompatibility) {
+  Json::StreamWriterBuilder b;
+  Json::Value root;
+  root["hello"] = "world";
+
+  b.settings_["indentation"] = "";
+  JSONTEST_ASSERT(Json::writeString(b, root) == "{\"hello\":\"world\"}");
+
+  b.settings_["enableYAMLCompatibility"] = true;
+  JSONTEST_ASSERT(Json::writeString(b, root) == "{\"hello\": \"world\"}");
+
+  b.settings_["enableYAMLCompatibility"] = false;
+  JSONTEST_ASSERT(Json::writeString(b, root) == "{\"hello\":\"world\"}");
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, indentation) {
+  Json::StreamWriterBuilder b;
+  Json::Value root;
+  root["hello"] = "world";
+
+  b.settings_["indentation"] = "";
+  JSONTEST_ASSERT(Json::writeString(b, root) == "{\"hello\":\"world\"}");
+
+  b.settings_["indentation"] = "\t";
+  JSONTEST_ASSERT(Json::writeString(b, root) ==
+                  "{\n\t\"hello\" : \"world\"\n}");
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, writeZeroes) {
+  Json::String binary("hi", 3); // include trailing 0
+  JSONTEST_ASSERT_EQUAL(3, binary.length());
+  Json::String expected(R"("hi\u0000")"); // unicoded zero
+  Json::StreamWriterBuilder b;
+  {
+    Json::Value root;
+    root = binary;
+    JSONTEST_ASSERT_STRING_EQUAL(binary, root.asString());
+    Json::String out = Json::writeString(b, root);
+    JSONTEST_ASSERT_EQUAL(expected.size(), out.size());
+    JSONTEST_ASSERT_STRING_EQUAL(expected, out);
+  }
+  {
+    Json::Value root;
+    root["top"] = binary;
+    JSONTEST_ASSERT_STRING_EQUAL(binary, root["top"].asString());
+    Json::String out = Json::writeString(b, root["top"]);
+    JSONTEST_ASSERT_STRING_EQUAL(expected, out);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, unicode) {
+  // Create a Json value containing UTF-8 string with some chars that need
+  // escape (tab,newline).
+  Json::Value root;
+  root["test"] = "\t\n\xF0\x91\xA2\xA1\x3D\xC4\xB3\xF0\x9B\x84\x9B\xEF\xBD\xA7";
+
+  Json::StreamWriterBuilder b;
+
+  // Default settings - should be unicode escaped.
+  JSONTEST_ASSERT(Json::writeString(b, root) ==
+                  "{\n\t\"test\" : "
+                  "\"\\t\\n\\ud806\\udca1=\\u0133\\ud82c\\udd1b\\uff67\"\n}");
+
+  b.settings_["emitUTF8"] = true;
+
+  // Should not be unicode escaped.
+  JSONTEST_ASSERT(
+      Json::writeString(b, root) ==
+      "{\n\t\"test\" : "
+      "\"\\t\\n\xF0\x91\xA2\xA1=\xC4\xB3\xF0\x9B\x84\x9B\xEF\xBD\xA7\"\n}");
+
+  b.settings_["emitUTF8"] = false;
+
+  // Should be unicode escaped.
+  JSONTEST_ASSERT(Json::writeString(b, root) ==
+                  "{\n\t\"test\" : "
+                  "\"\\t\\n\\ud806\\udca1=\\u0133\\ud82c\\udd1b\\uff67\"\n}");
+}
+
+// Control chars should be escaped regardless of UTF-8 input encoding.
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, escapeControlCharacters) {
+  auto uEscape = [](unsigned ch) {
+    static const char h[] = "0123456789abcdef";
+    std::string r = "\\u";
+    r += h[(ch >> (3 * 4)) & 0xf];
+    r += h[(ch >> (2 * 4)) & 0xf];
+    r += h[(ch >> (1 * 4)) & 0xf];
+    r += h[(ch >> (0 * 4)) & 0xf];
+    return r;
+  };
+  auto shortEscape = [](unsigned ch) -> const char* {
+    switch (ch) {
+    case '\"':
+      return "\\\"";
+    case '\\':
+      return "\\\\";
+    case '\b':
+      return "\\b";
+    case '\f':
+      return "\\f";
+    case '\n':
+      return "\\n";
+    case '\r':
+      return "\\r";
+    case '\t':
+      return "\\t";
+    default:
+      return nullptr;
+    }
+  };
+
+  Json::StreamWriterBuilder b;
+
+  for (bool emitUTF8 : {true, false}) {
+    b.settings_["emitUTF8"] = emitUTF8;
+
+    for (unsigned i = 0; i != 0x100; ++i) {
+      if (!emitUTF8 && i >= 0x80)
+        break; // The algorithm would try to parse UTF-8, so stop here.
+
+      std::string raw({static_cast<char>(i)});
+      std::string esc = raw;
+      if (i < 0x20)
+        esc = uEscape(i);
+      if (const char* shEsc = shortEscape(i))
+        esc = shEsc;
+
+      // std::cout << "emit=" << emitUTF8 << ", i=" << std::hex << i << std::dec
+      //          << std::endl;
+
+      Json::Value root;
+      root["test"] = raw;
+      JSONTEST_ASSERT_STRING_EQUAL(
+          std::string("{\n\t\"test\" : \"").append(esc).append("\"\n}"),
+          Json::writeString(b, root))
+          << ", emit=" << emitUTF8 << ", i=" << i << ", raw=\"" << raw << "\""
+          << ", esc=\"" << esc << "\"";
+    }
+  }
+}
+
+#ifdef _WIN32
+JSONTEST_FIXTURE_LOCAL(StreamWriterTest, escapeTabCharacterWindows) {
+  // Get the current locale before changing it
+  std::string currentLocale = setlocale(LC_ALL, NULL);
+  setlocale(LC_ALL, "English_United States.1252");
+
+  Json::Value root;
+  root["test"] = "\tTabTesting\t";
+
+  Json::StreamWriterBuilder b;
+
+  JSONTEST_ASSERT(Json::writeString(b, root) == "{\n\t\"test\" : "
+                                                "\"\\tTabTesting\\t\"\n}");
+
+  b.settings_["emitUTF8"] = true;
+  JSONTEST_ASSERT(Json::writeString(b, root) == "{\n\t\"test\" : "
+                                                "\"\\tTabTesting\\t\"\n}");
+
+  b.settings_["emitUTF8"] = false;
+  JSONTEST_ASSERT(Json::writeString(b, root) == "{\n\t\"test\" : "
+                                                "\"\\tTabTesting\\t\"\n}");
+
+  // Restore the locale
+  if (!currentLocale.empty())
+    setlocale(LC_ALL, currentLocale.c_str());
+}
+#endif
+
+struct ReaderTest : JsonTest::TestCase {
+  void setStrictMode() {
+    reader = std::unique_ptr<Json::Reader>(
+        new Json::Reader(Json::Features{}.strictMode()));
+  }
+
+  void setFeatures(Json::Features& features) {
+    reader = std::unique_ptr<Json::Reader>(new Json::Reader(features));
+  }
+
+  void checkStructuredErrors(
+      const std::vector<Json::Reader::StructuredError>& actual,
+      const std::vector<Json::Reader::StructuredError>& expected) {
+    JSONTEST_ASSERT_EQUAL(expected.size(), actual.size());
+    for (size_t i = 0; i < actual.size(); ++i) {
+      const auto& a = actual[i];
+      const auto& e = expected[i];
+      JSONTEST_ASSERT_EQUAL(e.offset_start, a.offset_start) << i;
+      JSONTEST_ASSERT_EQUAL(e.offset_limit, a.offset_limit) << i;
+      JSONTEST_ASSERT_EQUAL(e.message, a.message) << i;
+    }
+  }
+
+  template <typename Input> void checkParse(Input&& input) {
+    JSONTEST_ASSERT(reader->parse(input, root));
+  }
+
+  template <typename Input>
+  void
+  checkParse(Input&& input,
+             const std::vector<Json::Reader::StructuredError>& structured) {
+    JSONTEST_ASSERT(!reader->parse(input, root));
+    checkStructuredErrors(reader->getStructuredErrors(), structured);
+  }
+
+  template <typename Input>
+  void checkParse(Input&& input,
+                  const std::vector<Json::Reader::StructuredError>& structured,
+                  const std::string& formatted) {
+    checkParse(input, structured);
+    JSONTEST_ASSERT_EQUAL(formatted, reader->getFormattedErrorMessages());
+  }
+
+  std::unique_ptr<Json::Reader> reader{new Json::Reader()};
+  Json::Value root;
+};
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseWithNoErrors) {
+  checkParse(R"({ "property" : "value" })");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseObject) {
+  checkParse(R"({"property"})",
+             {{11, 12, "Missing ':' after object member name"}},
+             "* Line 1, Column 12\n  Missing ':' after object member name\n");
+  checkParse(
+      R"({"property" : "value" )",
+      {{22, 22, "Missing ',' or '}' in object declaration"}},
+      "* Line 1, Column 23\n  Missing ',' or '}' in object declaration\n");
+  checkParse(R"({"property" : "value", )",
+             {{23, 23, "Missing '}' or object member name"}},
+             "* Line 1, Column 24\n  Missing '}' or object member name\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseArray) {
+  checkParse(
+      R"([ "value" )", {{10, 10, "Missing ',' or ']' in array declaration"}},
+      "* Line 1, Column 11\n  Missing ',' or ']' in array declaration\n");
+  checkParse(
+      R"([ "value1" "value2" ] )",
+      {{11, 19, "Missing ',' or ']' in array declaration"}},
+      "* Line 1, Column 12\n  Missing ',' or ']' in array declaration\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseString) {
+  checkParse(R"([ "\u8a2a" ])");
+  checkParse(
+      R"([ "\ud801" ])",
+      {{2, 10,
+        "additional six characters expected to parse unicode surrogate "
+        "pair."}},
+      "* Line 1, Column 3\n"
+      "  additional six characters expected to parse unicode surrogate pair.\n"
+      "See Line 1, Column 10 for detail.\n");
+  checkParse(R"([ "\ud801\d1234" ])",
+             {{2, 16,
+               "expecting another \\u token to begin the "
+               "second half of a unicode surrogate pair"}},
+             "* Line 1, Column 3\n"
+             "  expecting another \\u token to begin the "
+             "second half of a unicode surrogate pair\n"
+             "See Line 1, Column 12 for detail.\n");
+  checkParse(R"([ "\ua3t@" ])",
+             {{2, 10,
+               "Bad unicode escape sequence in string: "
+               "hexadecimal digit expected."}},
+             "* Line 1, Column 3\n"
+             "  Bad unicode escape sequence in string: "
+             "hexadecimal digit expected.\n"
+             "See Line 1, Column 9 for detail.\n");
+  checkParse(
+      R"([ "\ua3t" ])",
+      {{2, 9, "Bad unicode escape sequence in string: four digits expected."}},
+      "* Line 1, Column 3\n"
+      "  Bad unicode escape sequence in string: four digits expected.\n"
+      "See Line 1, Column 6 for detail.\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseComment) {
+  checkParse(
+      R"({ /*commentBeforeValue*/ "property" : "value" }//commentAfterValue)"
+      "\n");
+  checkParse(" true //comment1\n//comment2\r//comment3\r\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, streamParseWithNoErrors) {
+  std::string styled = R"({ "property" : "value" })";
+  std::istringstream iss(styled);
+  checkParse(iss);
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseWithNoErrorsTestingOffsets) {
+  checkParse(R"({)"
+             R"( "property" : ["value", "value2"],)"
+             R"( "obj" : { "nested" : -6.2e+15, "bool" : true},)"
+             R"( "null" : null,)"
+             R"( "false" : false)"
+             R"( })");
+  auto checkOffsets = [&](const Json::Value& v, int start, int limit) {
+    JSONTEST_ASSERT_EQUAL(start, v.getOffsetStart());
+    JSONTEST_ASSERT_EQUAL(limit, v.getOffsetLimit());
+  };
+  checkOffsets(root, 0, 115);
+  checkOffsets(root["property"], 15, 34);
+  checkOffsets(root["property"][0], 16, 23);
+  checkOffsets(root["property"][1], 25, 33);
+  checkOffsets(root["obj"], 44, 81);
+  checkOffsets(root["obj"]["nested"], 57, 65);
+  checkOffsets(root["obj"]["bool"], 76, 80);
+  checkOffsets(root["null"], 92, 96);
+  checkOffsets(root["false"], 108, 113);
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseWithOneError) {
+  checkParse(R"({ "property" :: "value" })",
+             {{14, 15, "Syntax error: value, object or array expected."}},
+             "* Line 1, Column 15\n  Syntax error: value, object or array "
+             "expected.\n");
+  checkParse("s", {{0, 1, "Syntax error: value, object or array expected."}},
+             "* Line 1, Column 1\n  Syntax error: value, object or array "
+             "expected.\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseSpecialFloat) {
+  checkParse(R"({ "a" : Infi })",
+             {{8, 9, "Syntax error: value, object or array expected."}},
+             "* Line 1, Column 9\n  Syntax error: value, object or array "
+             "expected.\n");
+  checkParse(R"({ "a" : Infiniaa })",
+             {{8, 9, "Syntax error: value, object or array expected."}},
+             "* Line 1, Column 9\n  Syntax error: value, object or array "
+             "expected.\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, strictModeParseNumber) {
+  setStrictMode();
+  checkParse(
+      "123",
+      {{0, 3,
+        "A valid JSON document must be either an array or an object value."}},
+      "* Line 1, Column 1\n"
+      "  A valid JSON document must be either an array or an object value.\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseChineseWithOneError) {
+  checkParse(R"({ "pr)"
+             u8"\u4f50\u85e4" // 佐藤
+             R"(erty" :: "value" })",
+             {{18, 19, "Syntax error: value, object or array expected."}},
+             "* Line 1, Column 19\n  Syntax error: value, object or array "
+             "expected.\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, parseWithDetailError) {
+  checkParse(R"({ "property" : "v\alue" })",
+             {{15, 23, "Bad escape sequence in string"}},
+             "* Line 1, Column 16\n"
+             "  Bad escape sequence in string\n"
+             "See Line 1, Column 20 for detail.\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, pushErrorTest) {
+  checkParse(R"({ "AUTHOR" : 123 })");
+  if (!root["AUTHOR"].isString()) {
+    JSONTEST_ASSERT(
+        reader->pushError(root["AUTHOR"], "AUTHOR must be a string"));
+  }
+  JSONTEST_ASSERT_STRING_EQUAL(reader->getFormattedErrorMessages(),
+                               "* Line 1, Column 14\n"
+                               "  AUTHOR must be a string\n");
+
+  checkParse(R"({ "AUTHOR" : 123 })");
+  if (!root["AUTHOR"].isString()) {
+    JSONTEST_ASSERT(reader->pushError(root["AUTHOR"], "AUTHOR must be a string",
+                                      root["AUTHOR"]));
+  }
+  JSONTEST_ASSERT_STRING_EQUAL(reader->getFormattedErrorMessages(),
+                               "* Line 1, Column 14\n"
+                               "  AUTHOR must be a string\n"
+                               "See Line 1, Column 14 for detail.\n");
+}
+
+JSONTEST_FIXTURE_LOCAL(ReaderTest, allowNumericKeysTest) {
+  Json::Features features;
+  features.allowNumericKeys_ = true;
+  setFeatures(features);
+  checkParse(R"({ 123 : "abc" })");
+}
+
+struct CharReaderTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseWithNoErrors) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
+  Json::Value root;
+  char const doc[] = R"({ "property" : "value" })";
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT(errs.empty());
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseWithNoErrorsTestingOffsets) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
+  Json::Value root;
+  char const doc[] = "{ \"property\" : [\"value\", \"value2\"], \"obj\" : "
+                     "{ \"nested\" : -6.2e+15, \"num\" : +123, \"bool\" : "
+                     "true}, \"null\" : null, \"false\" : false }";
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT(errs.empty());
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseNumber) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
+  Json::Value root;
+  {
+    // if intvalue > threshold, treat the number as a double.
+    // 21 digits
+    char const doc[] = "[111111111111111111111]";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT(errs.empty());
+    JSONTEST_ASSERT_EQUAL(1.1111111111111111e+020, root[0]);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseString) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::Value root;
+  Json::String errs;
+  {
+    char const doc[] = "[\"\"]";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT(errs.empty());
+    JSONTEST_ASSERT_EQUAL("", root[0]);
+  }
+  {
+    char const doc[] = R"(["\u8A2a"])";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT(errs.empty());
+    JSONTEST_ASSERT_EQUAL(u8"\u8A2a", root[0].asString()); // "訪"
+  }
+  {
+    char const doc[] = R"([ "\uD801" ])";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 3\n"
+                            "  additional six characters expected to "
+                            "parse unicode surrogate pair.\n"
+                            "See Line 1, Column 10 for detail.\n");
+  }
+  {
+    char const doc[] = R"([ "\uD801\d1234" ])";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 3\n"
+                            "  expecting another \\u token to begin the "
+                            "second half of a unicode surrogate pair\n"
+                            "See Line 1, Column 12 for detail.\n");
+  }
+  {
+    char const doc[] = R"([ "\ua3t@" ])";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 3\n"
+                            "  Bad unicode escape sequence in string: "
+                            "hexadecimal digit expected.\n"
+                            "See Line 1, Column 9 for detail.\n");
+  }
+  {
+    char const doc[] = R"([ "\ua3t" ])";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(
+        errs ==
+        "* Line 1, Column 3\n"
+        "  Bad unicode escape sequence in string: four digits expected.\n"
+        "See Line 1, Column 6 for detail.\n");
+  }
+  {
+    b.settings_["allowSingleQuotes"] = true;
+    CharReaderPtr charreader(b.newCharReader());
+    char const doc[] = R"({'a': 'x\ty', "b":'x\\y'})";
+    bool ok = charreader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(2u, root.size());
+    JSONTEST_ASSERT_STRING_EQUAL("x\ty", root["a"].asString());
+    JSONTEST_ASSERT_STRING_EQUAL("x\\y", root["b"].asString());
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseComment) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::Value root;
+  Json::String errs;
+  {
+    char const doc[] = "//comment1\n { //comment2\n \"property\" :"
+                       " \"value\" //comment3\n } //comment4\n";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT(errs.empty());
+    JSONTEST_ASSERT_EQUAL("value", root["property"]);
+  }
+  {
+    char const doc[] = "{ \"property\" //comment\n : \"value\" }";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 14\n"
+                            "  Missing ':' after object member name\n");
+  }
+  {
+    char const doc[] = "//comment1\n [ //comment2\n \"value\" //comment3\n,"
+                       " //comment4\n true //comment5\n ] //comment6\n";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT(errs.empty());
+    JSONTEST_ASSERT_EQUAL("value", root[0]);
+    JSONTEST_ASSERT_EQUAL(true, root[1]);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseObjectWithErrors) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::Value root;
+  Json::String errs;
+  {
+    char const doc[] = R"({ "property" : "value" )";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 24\n"
+                            "  Missing ',' or '}' in object declaration\n");
+    JSONTEST_ASSERT_EQUAL("value", root["property"]);
+  }
+  {
+    char const doc[] = R"({ "property" : "value" ,)";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 25\n"
+                            "  Missing '}' or object member name\n");
+    JSONTEST_ASSERT_EQUAL("value", root["property"]);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseArrayWithErrors) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::Value root;
+  Json::String errs;
+  {
+    char const doc[] = "[ \"value\" ";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 11\n"
+                            "  Missing ',' or ']' in array declaration\n");
+    JSONTEST_ASSERT_EQUAL("value", root[0]);
+  }
+  {
+    char const doc[] = R"([ "value1" "value2" ])";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT(errs == "* Line 1, Column 12\n"
+                            "  Missing ',' or ']' in array declaration\n");
+    JSONTEST_ASSERT_EQUAL("value1", root[0]);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseWithOneError) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
+  Json::Value root;
+  char const doc[] = R"({ "property" :: "value" })";
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
   JSONTEST_ASSERT(!ok);
-  JSONTEST_ASSERT(reader.getFormattedErrorMessages() ==
+  JSONTEST_ASSERT(errs ==
                   "* Line 1, Column 15\n  Syntax error: value, object or array "
                   "expected.\n");
-  std::vector<Json::Reader::StructuredError> errors =
-      reader.getStructuredErrors();
-  JSONTEST_ASSERT(errors.size() == 1);
-  JSONTEST_ASSERT(errors.at(0).offset_start == 14);
-  JSONTEST_ASSERT(errors.at(0).offset_limit == 15);
-  JSONTEST_ASSERT(errors.at(0).message ==
-                  "Syntax error: value, object or array expected.");
 }
 
-JSONTEST_FIXTURE(ReaderTest, parseChineseWithOneError) {
-  Json::Reader reader;
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseChineseWithOneError) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
   Json::Value root;
-  bool ok = reader.parse("{ \"pr佐藤erty\" :: \"value\" }", root);
+  char const doc[] = "{ \"pr佐藤erty\" :: \"value\" }";
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
   JSONTEST_ASSERT(!ok);
-  JSONTEST_ASSERT(reader.getFormattedErrorMessages() ==
+  JSONTEST_ASSERT(errs ==
                   "* Line 1, Column 19\n  Syntax error: value, object or array "
                   "expected.\n");
-  std::vector<Json::Reader::StructuredError> errors =
-      reader.getStructuredErrors();
-  JSONTEST_ASSERT(errors.size() == 1);
-  JSONTEST_ASSERT(errors.at(0).offset_start == 18);
-  JSONTEST_ASSERT(errors.at(0).offset_limit == 19);
-  JSONTEST_ASSERT(errors.at(0).message ==
-                  "Syntax error: value, object or array expected.");
 }
 
-JSONTEST_FIXTURE(ReaderTest, parseWithDetailError) {
-  Json::Reader reader;
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseWithDetailError) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
   Json::Value root;
-  bool ok = reader.parse("{ \"property\" : \"v\\alue\" }", root);
+  char const doc[] = R"({ "property" : "v\alue" })";
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
   JSONTEST_ASSERT(!ok);
-  JSONTEST_ASSERT(reader.getFormattedErrorMessages() ==
+  JSONTEST_ASSERT(errs ==
                   "* Line 1, Column 16\n  Bad escape sequence in string\nSee "
                   "Line 1, Column 20 for detail.\n");
-  std::vector<Json::Reader::StructuredError> errors =
-      reader.getStructuredErrors();
-  JSONTEST_ASSERT(errors.size() == 1);
-  JSONTEST_ASSERT(errors.at(0).offset_start == 15);
-  JSONTEST_ASSERT(errors.at(0).offset_limit == 23);
-  JSONTEST_ASSERT(errors.at(0).message == "Bad escape sequence in string");
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, parseWithStackLimit) {
+  Json::CharReaderBuilder b;
+  Json::Value root;
+  char const doc[] = R"({ "property" : "value" })";
+  {
+    b.settings_["stackLimit"] = 2;
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT(errs.empty());
+    JSONTEST_ASSERT_EQUAL("value", root["property"]);
+  }
+  {
+    b.settings_["stackLimit"] = 1;
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    JSONTEST_ASSERT_THROWS(
+        reader->parse(doc, doc + std::strlen(doc), &root, &errs));
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderTest, testOperator) {
+  const std::string styled = R"({ "property" : "value" })";
+  std::istringstream iss(styled);
+  Json::Value root;
+  iss >> root;
+  JSONTEST_ASSERT_EQUAL("value", root["property"]);
+}
+
+struct CharReaderStrictModeTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderStrictModeTest, dupKeys) {
+  Json::CharReaderBuilder b;
+  Json::Value root;
+  char const doc[] =
+      R"({ "property" : "value", "key" : "val1", "key" : "val2" })";
+  {
+    b.strictMode(&b.settings_);
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL("* Line 1, Column 41\n"
+                                 "  Duplicate key: 'key'\n",
+                                 errs);
+    JSONTEST_ASSERT_EQUAL("val1", root["key"]); // so far
+  }
+}
+struct CharReaderFailIfExtraTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderFailIfExtraTest, issue164) {
+  // This is interpreted as a string value followed by a colon.
+  Json::CharReaderBuilder b;
+  Json::Value root;
+  char const doc[] = R"( "property" : "value" })";
+  {
+    b.settings_["failIfExtra"] = false;
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT(errs.empty());
+    JSONTEST_ASSERT_EQUAL("property", root);
+  }
+  {
+    b.settings_["failIfExtra"] = true;
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL("* Line 1, Column 13\n"
+                                 "  Extra non-whitespace after JSON value.\n",
+                                 errs);
+    JSONTEST_ASSERT_EQUAL("property", root);
+  }
+  {
+    b.strictMode(&b.settings_);
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL("* Line 1, Column 13\n"
+                                 "  Extra non-whitespace after JSON value.\n",
+                                 errs);
+    JSONTEST_ASSERT_EQUAL("property", root);
+  }
+  {
+    b.strictMode(&b.settings_);
+    b.settings_["failIfExtra"] = false;
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL(
+        "* Line 1, Column 1\n"
+        "  A valid JSON document must be either an array or an object value.\n",
+        errs);
+    JSONTEST_ASSERT_EQUAL("property", root);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderFailIfExtraTest, issue107) {
+  // This is interpreted as an int value followed by a colon.
+  Json::CharReaderBuilder b;
+  Json::Value root;
+  char const doc[] = "1:2:3";
+  b.settings_["failIfExtra"] = true;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+  JSONTEST_ASSERT(!ok);
+  JSONTEST_ASSERT_STRING_EQUAL("* Line 1, Column 2\n"
+                               "  Extra non-whitespace after JSON value.\n",
+                               errs);
+  JSONTEST_ASSERT_EQUAL(1, root.asInt());
+}
+JSONTEST_FIXTURE_LOCAL(CharReaderFailIfExtraTest, commentAfterObject) {
+  Json::CharReaderBuilder b;
+  Json::Value root;
+  {
+    char const doc[] = "{ \"property\" : \"value\" } //trailing\n//comment\n";
+    b.settings_["failIfExtra"] = true;
+    CharReaderPtr reader(b.newCharReader());
+    Json::String errs;
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL("value", root["property"]);
+  }
+}
+JSONTEST_FIXTURE_LOCAL(CharReaderFailIfExtraTest, commentAfterArray) {
+  Json::CharReaderBuilder b;
+  Json::Value root;
+  char const doc[] = "[ \"property\" , \"value\" ] //trailing\n//comment\n";
+  b.settings_["failIfExtra"] = true;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT_STRING_EQUAL("", errs);
+  JSONTEST_ASSERT_EQUAL("value", root[1u]);
+}
+JSONTEST_FIXTURE_LOCAL(CharReaderFailIfExtraTest, commentAfterBool) {
+  Json::CharReaderBuilder b;
+  Json::Value root;
+  char const doc[] = " true /*trailing\ncomment*/";
+  b.settings_["failIfExtra"] = true;
+  CharReaderPtr reader(b.newCharReader());
+  Json::String errs;
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT_STRING_EQUAL("", errs);
+  JSONTEST_ASSERT_EQUAL(true, root.asBool());
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderFailIfExtraTest, parseComment) {
+  Json::CharReaderBuilder b;
+  b.settings_["failIfExtra"] = true;
+  CharReaderPtr reader(b.newCharReader());
+  Json::Value root;
+  Json::String errs;
+  {
+    char const doc[] = " true //comment1\n//comment2\r//comment3\r\n";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(true, root.asBool());
+  }
+  {
+    char const doc[] = " true //com\rment";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL("* Line 2, Column 1\n"
+                                 "  Extra non-whitespace after JSON value.\n",
+                                 errs);
+    JSONTEST_ASSERT_EQUAL(true, root.asBool());
+  }
+  {
+    char const doc[] = " true //com\nment";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL("* Line 2, Column 1\n"
+                                 "  Extra non-whitespace after JSON value.\n",
+                                 errs);
+    JSONTEST_ASSERT_EQUAL(true, root.asBool());
+  }
+}
+
+struct CharReaderAllowDropNullTest : JsonTest::TestCase {
+  using Value = Json::Value;
+  using ValueCheck = std::function<void(const Value&)>;
+
+  Value nullValue = Value{Json::nullValue};
+  Value emptyArray = Value{Json::arrayValue};
+
+  ValueCheck checkEq(const Value& v) {
+    return [=](const Value& root) { JSONTEST_ASSERT_EQUAL(root, v); };
+  }
+
+  static ValueCheck objGetAnd(std::string idx, ValueCheck f) {
+    return [=](const Value& root) { f(root.get(idx, true)); };
+  }
+
+  static ValueCheck arrGetAnd(int idx, ValueCheck f) {
+    return [=](const Value& root) { f(root[idx]); };
+  }
+};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderAllowDropNullTest, issue178) {
+  struct TestSpec {
+    int line;
+    std::string doc;
+    size_t rootSize;
+    ValueCheck onRoot;
+  };
+  const TestSpec specs[] = {
+      {__LINE__, R"({"a":,"b":true})", 2, objGetAnd("a", checkEq(nullValue))},
+      {__LINE__, R"({"a":,"b":true})", 2, objGetAnd("a", checkEq(nullValue))},
+      {__LINE__, R"({"a":})", 1, objGetAnd("a", checkEq(nullValue))},
+      {__LINE__, "[]", 0, checkEq(emptyArray)},
+      {__LINE__, "[null]", 1, nullptr},
+      {__LINE__, "[,]", 2, nullptr},
+      {__LINE__, "[,,,]", 4, nullptr},
+      {__LINE__, "[null,]", 2, nullptr},
+      {__LINE__, "[,null]", 2, nullptr},
+      {__LINE__, "[,,]", 3, nullptr},
+      {__LINE__, "[null,,]", 3, nullptr},
+      {__LINE__, "[,null,]", 3, nullptr},
+      {__LINE__, "[,,null]", 3, nullptr},
+      {__LINE__, "[[],,,]", 4, arrGetAnd(0, checkEq(emptyArray))},
+      {__LINE__, "[,[],,]", 4, arrGetAnd(1, checkEq(emptyArray))},
+      {__LINE__, "[,,,[]]", 4, arrGetAnd(3, checkEq(emptyArray))},
+  };
+  for (const auto& spec : specs) {
+    Json::CharReaderBuilder b;
+    b.settings_["allowDroppedNullPlaceholders"] = true;
+    std::unique_ptr<Json::CharReader> reader(b.newCharReader());
+
+    Json::Value root;
+    Json::String errs;
+    bool ok = reader->parse(spec.doc.data(), spec.doc.data() + spec.doc.size(),
+                            &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL(errs, "");
+    if (spec.onRoot) {
+      spec.onRoot(root);
+    }
+  }
+}
+
+struct CharReaderAllowNumericKeysTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderAllowNumericKeysTest, allowNumericKeys) {
+  Json::CharReaderBuilder b;
+  b.settings_["allowNumericKeys"] = true;
+  Json::Value root;
+  Json::String errs;
+  CharReaderPtr reader(b.newCharReader());
+  char const doc[] = "{15:true,-16:true,12.01:true}";
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT_STRING_EQUAL("", errs);
+  JSONTEST_ASSERT_EQUAL(3u, root.size());
+  JSONTEST_ASSERT_EQUAL(true, root.get("15", false));
+  JSONTEST_ASSERT_EQUAL(true, root.get("-16", false));
+  JSONTEST_ASSERT_EQUAL(true, root.get("12.01", false));
+}
+
+struct CharReaderAllowSingleQuotesTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderAllowSingleQuotesTest, issue182) {
+  Json::CharReaderBuilder b;
+  b.settings_["allowSingleQuotes"] = true;
+  Json::Value root;
+  Json::String errs;
+  CharReaderPtr reader(b.newCharReader());
+  {
+    char const doc[] = "{'a':true,\"b\":true}";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(2u, root.size());
+    JSONTEST_ASSERT_EQUAL(true, root.get("a", false));
+    JSONTEST_ASSERT_EQUAL(true, root.get("b", false));
+  }
+  {
+    char const doc[] = "{'a': 'x', \"b\":'y'}";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(2u, root.size());
+    JSONTEST_ASSERT_STRING_EQUAL("x", root["a"].asString());
+    JSONTEST_ASSERT_STRING_EQUAL("y", root["b"].asString());
+  }
+}
+
+struct CharReaderAllowZeroesTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderAllowZeroesTest, issue176) {
+  Json::CharReaderBuilder b;
+  b.settings_["allowSingleQuotes"] = true;
+  Json::Value root;
+  Json::String errs;
+  CharReaderPtr reader(b.newCharReader());
+  {
+    char const doc[] = "{'a':true,\"b\":true}";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(2u, root.size());
+    JSONTEST_ASSERT_EQUAL(true, root.get("a", false));
+    JSONTEST_ASSERT_EQUAL(true, root.get("b", false));
+  }
+  {
+    char const doc[] = "{'a': 'x', \"b\":'y'}";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(2u, root.size());
+    JSONTEST_ASSERT_STRING_EQUAL("x", root["a"].asString());
+    JSONTEST_ASSERT_STRING_EQUAL("y", root["b"].asString());
+  }
+}
+
+struct CharReaderAllowSpecialFloatsTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(CharReaderAllowSpecialFloatsTest, specialFloat) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::Value root;
+  Json::String errs;
+  {
+    char const doc[] = "{\"a\": NaN}";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL(
+        "* Line 1, Column 7\n"
+        "  Syntax error: value, object or array expected.\n",
+        errs);
+  }
+  {
+    char const doc[] = "{\"a\": Infinity}";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(!ok);
+    JSONTEST_ASSERT_STRING_EQUAL(
+        "* Line 1, Column 7\n"
+        "  Syntax error: value, object or array expected.\n",
+        errs);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(CharReaderAllowSpecialFloatsTest, issue209) {
+  Json::CharReaderBuilder b;
+  b.settings_["allowSpecialFloats"] = true;
+  Json::Value root;
+  Json::String errs;
+  CharReaderPtr reader(b.newCharReader());
+  {
+    char const doc[] = R"({"a":NaN,"b":Infinity,"c":-Infinity,"d":+Infinity})";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(4u, root.size());
+    double n = root["a"].asDouble();
+    JSONTEST_ASSERT(std::isnan(n));
+    JSONTEST_ASSERT_EQUAL(std::numeric_limits<double>::infinity(),
+                          root.get("b", 0.0));
+    JSONTEST_ASSERT_EQUAL(-std::numeric_limits<double>::infinity(),
+                          root.get("c", 0.0));
+    JSONTEST_ASSERT_EQUAL(std::numeric_limits<double>::infinity(),
+                          root.get("d", 0.0));
+  }
+
+  struct TestData {
+    int line;
+    bool ok;
+    Json::String in;
+  };
+  const TestData test_data[] = {
+      {__LINE__, true, "{\"a\":9}"},          //
+      {__LINE__, false, "{\"a\":0Infinity}"}, //
+      {__LINE__, false, "{\"a\":1Infinity}"}, //
+      {__LINE__, false, "{\"a\":9Infinity}"}, //
+      {__LINE__, false, "{\"a\":0nfinity}"},  //
+      {__LINE__, false, "{\"a\":1nfinity}"},  //
+      {__LINE__, false, "{\"a\":9nfinity}"},  //
+      {__LINE__, false, "{\"a\":nfinity}"},   //
+      {__LINE__, false, "{\"a\":.nfinity}"},  //
+      {__LINE__, false, "{\"a\":9nfinity}"},  //
+      {__LINE__, false, "{\"a\":-nfinity}"},  //
+      {__LINE__, true, "{\"a\":Infinity}"},   //
+      {__LINE__, false, "{\"a\":.Infinity}"}, //
+      {__LINE__, false, "{\"a\":_Infinity}"}, //
+      {__LINE__, false, "{\"a\":_nfinity}"},  //
+      {__LINE__, true, "{\"a\":-Infinity}"},  //
+      {__LINE__, true, "{\"a\":+Infinity}"}   //
+  };
+  for (const auto& td : test_data) {
+    bool ok = reader->parse(&*td.in.begin(), &*td.in.begin() + td.in.size(),
+                            &root, &errs);
+    JSONTEST_ASSERT(td.ok == ok) << "line:" << td.line << "\n"
+                                 << "  expected: {"
+                                 << "ok:" << td.ok << ", in:\'" << td.in << "\'"
+                                 << "}\n"
+                                 << "  actual: {"
+                                 << "ok:" << ok << "}\n";
+  }
+
+  {
+    char const doc[] = R"({"posInf": +Infinity, "NegInf": -Infinity})";
+    bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+    JSONTEST_ASSERT(ok);
+    JSONTEST_ASSERT_STRING_EQUAL("", errs);
+    JSONTEST_ASSERT_EQUAL(2u, root.size());
+    JSONTEST_ASSERT_EQUAL(std::numeric_limits<double>::infinity(),
+                          root["posInf"].asDouble());
+    JSONTEST_ASSERT_EQUAL(-std::numeric_limits<double>::infinity(),
+                          root["NegInf"].asDouble());
+  }
+}
+
+struct EscapeSequenceTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(EscapeSequenceTest, readerParseEscapeSequence) {
+  Json::Reader reader;
+  Json::Value root;
+  bool ok = reader.parse("[\"\\\"\",\"\\/\",\"\\\\\",\"\\b\","
+                         "\"\\f\",\"\\n\",\"\\r\",\"\\t\","
+                         "\"\\u0278\",\"\\ud852\\udf62\"]\n",
+                         root);
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT(reader.getFormattedErrorMessages().empty());
+  JSONTEST_ASSERT(reader.getStructuredErrors().empty());
+}
+
+JSONTEST_FIXTURE_LOCAL(EscapeSequenceTest, charReaderParseEscapeSequence) {
+  Json::CharReaderBuilder b;
+  CharReaderPtr reader(b.newCharReader());
+  Json::Value root;
+  Json::String errs;
+  char const doc[] = "[\"\\\"\",\"\\/\",\"\\\\\",\"\\b\","
+                     "\"\\f\",\"\\n\",\"\\r\",\"\\t\","
+                     "\"\\u0278\",\"\\ud852\\udf62\"]";
+  bool ok = reader->parse(doc, doc + std::strlen(doc), &root, &errs);
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT(errs.empty());
+}
+
+JSONTEST_FIXTURE_LOCAL(EscapeSequenceTest, writeEscapeSequence) {
+  Json::FastWriter writer;
+  const Json::String expected("[\"\\\"\",\"\\\\\",\"\\b\","
+                              "\"\\f\",\"\\n\",\"\\r\",\"\\t\","
+                              "\"\\u0278\",\"\\ud852\\udf62\"]\n");
+  Json::Value root;
+  root[0] = "\"";
+  root[1] = "\\";
+  root[2] = "\b";
+  root[3] = "\f";
+  root[4] = "\n";
+  root[5] = "\r";
+  root[6] = "\t";
+  root[7] = "ɸ";
+  root[8] = "𤭢";
+  const Json::String result = writer.write(root);
+  JSONTEST_ASSERT_STRING_EQUAL(expected, result);
+}
+
+struct BuilderTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(BuilderTest, settings) {
+  {
+    Json::Value errs;
+    Json::CharReaderBuilder rb;
+    JSONTEST_ASSERT_EQUAL(false, rb.settings_.isMember("foo"));
+    JSONTEST_ASSERT_EQUAL(true, rb.validate(&errs));
+    rb["foo"] = "bar";
+    JSONTEST_ASSERT_EQUAL(true, rb.settings_.isMember("foo"));
+    JSONTEST_ASSERT_EQUAL(false, rb.validate(&errs));
+  }
+  {
+    Json::Value errs;
+    Json::StreamWriterBuilder wb;
+    JSONTEST_ASSERT_EQUAL(false, wb.settings_.isMember("foo"));
+    JSONTEST_ASSERT_EQUAL(true, wb.validate(&errs));
+    wb["foo"] = "bar";
+    JSONTEST_ASSERT_EQUAL(true, wb.settings_.isMember("foo"));
+    JSONTEST_ASSERT_EQUAL(false, wb.validate(&errs));
+  }
+}
+
+struct BomTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(BomTest, skipBom) {
+  const std::string with_bom = "\xEF\xBB\xBF{\"key\" : \"value\"}";
+  Json::Value root;
+  JSONCPP_STRING errs;
+  std::istringstream iss(with_bom);
+  bool ok = parseFromStream(Json::CharReaderBuilder(), iss, &root, &errs);
+  // The default behavior is to skip the BOM, so we can parse it normally.
+  JSONTEST_ASSERT(ok);
+  JSONTEST_ASSERT(errs.empty());
+  JSONTEST_ASSERT_STRING_EQUAL(root["key"].asString(), "value");
+}
+JSONTEST_FIXTURE_LOCAL(BomTest, notSkipBom) {
+  const std::string with_bom = "\xEF\xBB\xBF{\"key\" : \"value\"}";
+  Json::Value root;
+  JSONCPP_STRING errs;
+  std::istringstream iss(with_bom);
+  Json::CharReaderBuilder b;
+  b.settings_["skipBom"] = false;
+  bool ok = parseFromStream(b, iss, &root, &errs);
+  // Detect the BOM, and failed on it.
+  JSONTEST_ASSERT(!ok);
+  JSONTEST_ASSERT(!errs.empty());
+}
+
+struct IteratorTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, convert) {
+  Json::Value j;
+  const Json::Value& cj = j;
+  auto it = j.begin();
+  Json::Value::const_iterator cit;
+  cit = it;
+  JSONTEST_ASSERT(cit == cj.begin());
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, decrement) {
+  Json::Value json;
+  json["k1"] = "a";
+  json["k2"] = "b";
+  std::vector<std::string> values;
+  for (auto it = json.end(); it != json.begin();) {
+    --it;
+    values.push_back(it->asString());
+  }
+  JSONTEST_ASSERT((values == std::vector<std::string>{"b", "a"}));
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, reverseIterator) {
+  Json::Value json;
+  json["k1"] = "a";
+  json["k2"] = "b";
+  std::vector<std::string> values;
+  using Iter = decltype(json.begin());
+  auto re = std::reverse_iterator<Iter>(json.begin());
+  for (auto it = std::reverse_iterator<Iter>(json.end()); it != re; ++it) {
+    values.push_back(it->asString());
+  }
+  JSONTEST_ASSERT((values == std::vector<std::string>{"b", "a"}));
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, distance) {
+  {
+    Json::Value json;
+    json["k1"] = "a";
+    json["k2"] = "b";
+    int i = 0;
+    auto it = json.begin();
+    for (;; ++it, ++i) {
+      auto dist = it - json.begin();
+      JSONTEST_ASSERT_EQUAL(i, dist);
+      if (it == json.end())
+        break;
+    }
+  }
+  {
+    Json::Value empty;
+    JSONTEST_ASSERT_EQUAL(0, empty.end() - empty.end());
+    JSONTEST_ASSERT_EQUAL(0, empty.end() - empty.begin());
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, nullValues) {
+  {
+    Json::Value json;
+    auto end = json.end();
+    auto endCopy = end;
+    JSONTEST_ASSERT(endCopy == end);
+    endCopy = end;
+    JSONTEST_ASSERT(endCopy == end);
+  }
+  {
+    // Same test, now with const Value.
+    const Json::Value json;
+    auto end = json.end();
+    auto endCopy = end;
+    JSONTEST_ASSERT(endCopy == end);
+    endCopy = end;
+    JSONTEST_ASSERT(endCopy == end);
+  }
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, staticStringKey) {
+  Json::Value json;
+  json[Json::StaticString("k1")] = "a";
+  JSONTEST_ASSERT_EQUAL(Json::Value("k1"), json.begin().key());
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, names) {
+  Json::Value json;
+  json["k1"] = "a";
+  json["k2"] = "b";
+  Json::ValueIterator it = json.begin();
+  JSONTEST_ASSERT(it != json.end());
+  JSONTEST_ASSERT_EQUAL(Json::Value("k1"), it.key());
+  JSONTEST_ASSERT_STRING_EQUAL("k1", it.name());
+  JSONTEST_ASSERT_STRING_EQUAL("k1", it.memberName());
+  JSONTEST_ASSERT_EQUAL(-1, it.index());
+  ++it;
+  JSONTEST_ASSERT(it != json.end());
+  JSONTEST_ASSERT_EQUAL(Json::Value("k2"), it.key());
+  JSONTEST_ASSERT_STRING_EQUAL("k2", it.name());
+  JSONTEST_ASSERT_STRING_EQUAL("k2", it.memberName());
+  JSONTEST_ASSERT_EQUAL(-1, it.index());
+  ++it;
+  JSONTEST_ASSERT(it == json.end());
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, indexes) {
+  Json::Value json;
+  json[0] = "a";
+  json[1] = "b";
+  Json::ValueIterator it = json.begin();
+  JSONTEST_ASSERT(it != json.end());
+  JSONTEST_ASSERT_EQUAL(Json::Value(Json::ArrayIndex(0)), it.key());
+  JSONTEST_ASSERT_STRING_EQUAL("", it.name());
+  JSONTEST_ASSERT_EQUAL(0, it.index());
+  ++it;
+  JSONTEST_ASSERT(it != json.end());
+  JSONTEST_ASSERT_EQUAL(Json::Value(Json::ArrayIndex(1)), it.key());
+  JSONTEST_ASSERT_STRING_EQUAL("", it.name());
+  JSONTEST_ASSERT_EQUAL(1, it.index());
+  ++it;
+  JSONTEST_ASSERT(it == json.end());
+}
+
+JSONTEST_FIXTURE_LOCAL(IteratorTest, constness) {
+  Json::Value const v;
+  JSONTEST_ASSERT_THROWS(
+      Json::Value::iterator it(v.begin())); // Compile, but throw.
+
+  Json::Value value;
+
+  for (int i = 9; i < 12; ++i) {
+    Json::OStringStream out;
+    out << std::setw(2) << i;
+    Json::String str = out.str();
+    value[str] = str;
+  }
+
+  Json::OStringStream out;
+  // in old code, this will get a compile error
+  Json::Value::const_iterator iter = value.begin();
+  for (; iter != value.end(); ++iter) {
+    out << *iter << ',';
+  }
+  Json::String expected = R"(" 9","10","11",)";
+  JSONTEST_ASSERT_STRING_EQUAL(expected, out.str());
+}
+
+struct RValueTest : JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(RValueTest, moveConstruction) {
+  Json::Value json;
+  json["key"] = "value";
+  Json::Value moved = std::move(json);
+  JSONTEST_ASSERT(moved != json); // Possibly not nullValue; definitely not
+                                  // equal.
+  JSONTEST_ASSERT_EQUAL(Json::objectValue, moved.type());
+  JSONTEST_ASSERT_EQUAL(Json::stringValue, moved["key"].type());
+}
+
+struct FuzzTest : JsonTest::TestCase {};
+
+// Build and run the fuzz test without any fuzzer, so that it's guaranteed not
+// go out of date, even if it's never run as an actual fuzz test.
+JSONTEST_FIXTURE_LOCAL(FuzzTest, fuzzDoesntCrash) {
+  const std::string example = "{}";
+  JSONTEST_ASSERT_EQUAL(
+      0,
+      LLVMFuzzerTestOneInput(reinterpret_cast<const uint8_t*>(example.c_str()),
+                             example.size()));
 }
 
 int main(int argc, const char* argv[]) {
   JsonTest::Runner runner;
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, checkNormalizeFloatingPointStr);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, memberCount);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, objects);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, arrays);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, null);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, strings);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, bools);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, integers);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, nonIntegers);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareNull);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareInt);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareUInt);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareDouble);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareString);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareBoolean);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareArray);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareObject);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareType);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, offsetAccessors);
-  JSONTEST_REGISTER_FIXTURE(runner, ValueTest, typeChecksThrowExceptions);
 
-  JSONTEST_REGISTER_FIXTURE(runner, ReaderTest, parseWithNoErrors);
-  JSONTEST_REGISTER_FIXTURE(
-      runner, ReaderTest, parseWithNoErrorsTestingOffsets);
-  JSONTEST_REGISTER_FIXTURE(runner, ReaderTest, parseWithOneError);
-  JSONTEST_REGISTER_FIXTURE(runner, ReaderTest, parseChineseWithOneError);
-  JSONTEST_REGISTER_FIXTURE(runner, ReaderTest, parseWithDetailError);
-
-  JSONTEST_REGISTER_FIXTURE(runner, WriterTest, dropNullPlaceholders);
+  for (auto& local : local_) {
+    runner.add(local);
+  }
 
   return runner.runCommandLine(argc, argv);
 }
+
+struct MemberTemplateAs : JsonTest::TestCase {
+  template <typename T, typename F>
+  JsonTest::TestResult& EqEval(T v, F f) const {
+    const Json::Value j = v;
+    return JSONTEST_ASSERT_EQUAL(j.as<T>(), f(j));
+  }
+};
+
+JSONTEST_FIXTURE_LOCAL(MemberTemplateAs, BehavesSameAsNamedAs) {
+  const Json::Value jstr = "hello world";
+  JSONTEST_ASSERT_STRING_EQUAL(jstr.as<const char*>(), jstr.asCString());
+  JSONTEST_ASSERT_STRING_EQUAL(jstr.as<Json::String>(), jstr.asString());
+  EqEval(Json::Int(64), [](const Json::Value& j) { return j.asInt(); });
+  EqEval(Json::UInt(64), [](const Json::Value& j) { return j.asUInt(); });
+#if defined(JSON_HAS_INT64)
+  EqEval(Json::Int64(64), [](const Json::Value& j) { return j.asInt64(); });
+  EqEval(Json::UInt64(64), [](const Json::Value& j) { return j.asUInt64(); });
+#endif // if defined(JSON_HAS_INT64)
+  EqEval(Json::LargestInt(64),
+         [](const Json::Value& j) { return j.asLargestInt(); });
+  EqEval(Json::LargestUInt(64),
+         [](const Json::Value& j) { return j.asLargestUInt(); });
+
+  EqEval(69.69f, [](const Json::Value& j) { return j.asFloat(); });
+  EqEval(69.69, [](const Json::Value& j) { return j.asDouble(); });
+  EqEval(false, [](const Json::Value& j) { return j.asBool(); });
+  EqEval(true, [](const Json::Value& j) { return j.asBool(); });
+}
+
+class MemberTemplateIs : public JsonTest::TestCase {};
+
+JSONTEST_FIXTURE_LOCAL(MemberTemplateIs, BehavesSameAsNamedIs) {
+  const Json::Value values[] = {true, 142, 40.63, "hello world"};
+  for (const Json::Value& j : values) {
+    JSONTEST_ASSERT_EQUAL(j.is<bool>(), j.isBool());
+    JSONTEST_ASSERT_EQUAL(j.is<Json::Int>(), j.isInt());
+    JSONTEST_ASSERT_EQUAL(j.is<Json::Int64>(), j.isInt64());
+    JSONTEST_ASSERT_EQUAL(j.is<Json::UInt>(), j.isUInt());
+    JSONTEST_ASSERT_EQUAL(j.is<Json::UInt64>(), j.isUInt64());
+    JSONTEST_ASSERT_EQUAL(j.is<double>(), j.isDouble());
+    JSONTEST_ASSERT_EQUAL(j.is<Json::String>(), j.isString());
+  }
+}
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
diff --git a/src/test_lib_json/sconscript b/src/test_lib_json/sconscript
deleted file mode 100644
index 915fd01..0000000
--- a/src/test_lib_json/sconscript
+++ /dev/null
@@ -1,10 +0,0 @@
-Import( 'env_testing buildUnitTests' )
-
-buildUnitTests( env_testing, Split( """
-    main.cpp
-    jsontest.cpp
-     """ ),
-    'test_lib_json' )
-
-# For 'check' to work, 'libs' must be built first.
-env_testing.Depends('test_lib_json', '#libs')