Implement clang_saveTranslationUnit(), which saves a translation unit
into a PCH/AST file.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111006 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index 0f43cf6..4ba41b5 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -1454,6 +1454,13 @@
   return ATU;
 }
 
+int clang_saveTranslationUnit(CXTranslationUnit TU, const char *FileName) {
+  if (!TU)
+    return 1;
+  
+  return static_cast<ASTUnit *>(TU)->Save(FileName);
+}
+  
 void clang_disposeTranslationUnit(CXTranslationUnit CTUnit) {
   if (CTUnit)
     delete static_cast<ASTUnit *>(CTUnit);
diff --git a/tools/libclang/libclang.darwin.exports b/tools/libclang/libclang.darwin.exports
index 671d376..f8f4402 100644
--- a/tools/libclang/libclang.darwin.exports
+++ b/tools/libclang/libclang.darwin.exports
@@ -93,6 +93,7 @@
 _clang_isUnexposed
 _clang_parseTranslationUnit
 _clang_reparseTranslationUnit
+_clang_saveTranslationUnit
 _clang_setUseExternalASTGeneration
 _clang_tokenize
 _clang_visitChildren
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index 9b2d0ad..cdb04bc 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -93,6 +93,7 @@
 clang_isUnexposed
 clang_parseTranslationUnit
 clang_reparseTranslationUnit
+clang_saveTranslationUnit
 clang_setUseExternalASTGeneration
 clang_tokenize
 clang_visitChildren