[analyzer] Add checkers for OS X / iOS localizability issues
Add checkers that detect code-level localizability issues for OS X / iOS:
- A path sensitive checker that warns about uses of non-localized
NSStrings passed to UI methods expecting localized strings.
- A syntax checker that warns against not including a comment in
NSLocalizedString macros.
A patch by Kulpreet Chilana!
(This is the second attempt with the compilation issue on Windows and
the random test failures resolved.)
llvm-svn: 245093
diff --git a/clang/lib/StaticAnalyzer/Checkers/LocalizationChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/LocalizationChecker.cpp
new file mode 100644
index 0000000..3955a9a
--- /dev/null
+++ b/clang/lib/StaticAnalyzer/Checkers/LocalizationChecker.cpp
@@ -0,0 +1,595 @@
+//=- LocalizationChecker.cpp -------------------------------------*- C++ -*-==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a set of checks for localizability including:
+// 1) A checker that warns about uses of non-localized NSStrings passed to
+// UI methods expecting localized strings
+// 2) A syntactic checker that warns against the bad practice of
+// not including a comment in NSLocalizedString macros.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ClangSACheckers.h"
+#include "SelectorExtras.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
+#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
+#include "clang/StaticAnalyzer/Core/Checker.h"
+#include "clang/StaticAnalyzer/Core/CheckerManager.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/AST/RecursiveASTVisitor.h"
+#include "clang/AST/StmtVisitor.h"
+#include "llvm/Support/Unicode.h"
+#include "llvm/ADT/StringSet.h"
+
+using namespace clang;
+using namespace ento;
+
+namespace {
+struct LocalizedState {
+private:
+ enum Kind { NonLocalized, Localized } K;
+ LocalizedState(Kind InK) : K(InK) {}
+
+public:
+ bool isLocalized() const { return K == Localized; }
+ bool isNonLocalized() const { return K == NonLocalized; }
+
+ static LocalizedState getLocalized() { return LocalizedState(Localized); }
+ static LocalizedState getNonLocalized() {
+ return LocalizedState(NonLocalized);
+ }
+
+ // Overload the == operator
+ bool operator==(const LocalizedState &X) const { return K == X.K; }
+
+ // LLVMs equivalent of a hash function
+ void Profile(llvm::FoldingSetNodeID &ID) const { ID.AddInteger(K); }
+};
+
+class NonLocalizedStringChecker
+ : public Checker<check::PostCall, check::PreObjCMessage,
+ check::PostObjCMessage,
+ check::PostStmt<ObjCStringLiteral>> {
+
+ mutable std::unique_ptr<BugType> BT;
+
+ // Methods that require a localized string
+ mutable llvm::StringMap<llvm::StringMap<uint8_t>> UIMethods;
+ // Methods that return a localized string
+ mutable llvm::SmallSet<std::pair<StringRef, StringRef>, 12> LSM;
+ // C Functions that return a localized string
+ mutable llvm::StringSet<> LSF;
+
+ void initUIMethods(ASTContext &Ctx) const;
+ void initLocStringsMethods(ASTContext &Ctx) const;
+
+ bool hasNonLocalizedState(SVal S, CheckerContext &C) const;
+ bool hasLocalizedState(SVal S, CheckerContext &C) const;
+ void setNonLocalizedState(SVal S, CheckerContext &C) const;
+ void setLocalizedState(SVal S, CheckerContext &C) const;
+
+ bool isAnnotatedAsLocalized(const Decl *D) const;
+ void reportLocalizationError(SVal S, const ObjCMethodCall &M,
+ CheckerContext &C, int argumentNumber = 0) const;
+
+public:
+ NonLocalizedStringChecker();
+
+ // When this parameter is set to true, the checker assumes all
+ // methods that return NSStrings are unlocalized. Thus, more false
+ // positives will be reported.
+ DefaultBool IsAggressive;
+
+ void checkPreObjCMessage(const ObjCMethodCall &msg, CheckerContext &C) const;
+ void checkPostObjCMessage(const ObjCMethodCall &msg, CheckerContext &C) const;
+ void checkPostStmt(const ObjCStringLiteral *SL, CheckerContext &C) const;
+ void checkPostCall(const CallEvent &Call, CheckerContext &C) const;
+};
+
+} // end anonymous namespace
+
+REGISTER_MAP_WITH_PROGRAMSTATE(LocalizedMemMap, const MemRegion *,
+ LocalizedState)
+
+NonLocalizedStringChecker::NonLocalizedStringChecker() {
+ BT.reset(new BugType(this, "Unlocalized string", "Localizability Error"));
+}
+
+/// Initializes a list of methods that require a localized string
+/// Format: {"ClassName", {{"selectorName:", LocStringArg#}, ...}, ...}
+void NonLocalizedStringChecker::initUIMethods(ASTContext &Ctx) const {
+ if (!UIMethods.empty())
+ return;
+
+ // TODO: This should eventually be a comprehensive list of UIKit methods
+
+ // UILabel Methods
+ llvm::StringMap<uint8_t> &UILabelM =
+ UIMethods.insert({"UILabel", llvm::StringMap<uint8_t>()}).first->second;
+ UILabelM.insert({"setText:", 0});
+
+ // UIButton Methods
+ llvm::StringMap<uint8_t> &UIButtonM =
+ UIMethods.insert({"UIButton", llvm::StringMap<uint8_t>()}).first->second;
+ UIButtonM.insert({"setText:", 0});
+
+ // UIAlertAction Methods
+ llvm::StringMap<uint8_t> &UIAlertActionM =
+ UIMethods.insert({"UIAlertAction", llvm::StringMap<uint8_t>()})
+ .first->second;
+ UIAlertActionM.insert({"actionWithTitle:style:handler:", 0});
+
+ // UIAlertController Methods
+ llvm::StringMap<uint8_t> &UIAlertControllerM =
+ UIMethods.insert({"UIAlertController", llvm::StringMap<uint8_t>()})
+ .first->second;
+ UIAlertControllerM.insert(
+ {"alertControllerWithTitle:message:preferredStyle:", 1});
+
+ // NSButton Methods
+ llvm::StringMap<uint8_t> &NSButtonM =
+ UIMethods.insert({"NSButton", llvm::StringMap<uint8_t>()}).first->second;
+ NSButtonM.insert({"setTitle:", 0});
+
+ // NSButtonCell Methods
+ llvm::StringMap<uint8_t> &NSButtonCellM =
+ UIMethods.insert({"NSButtonCell", llvm::StringMap<uint8_t>()})
+ .first->second;
+ NSButtonCellM.insert({"setTitle:", 0});
+
+ // NSMenuItem Methods
+ llvm::StringMap<uint8_t> &NSMenuItemM =
+ UIMethods.insert({"NSMenuItem", llvm::StringMap<uint8_t>()})
+ .first->second;
+ NSMenuItemM.insert({"setTitle:", 0});
+
+ // NSAttributedString Methods
+ llvm::StringMap<uint8_t> &NSAttributedStringM =
+ UIMethods.insert({"NSAttributedString", llvm::StringMap<uint8_t>()})
+ .first->second;
+ NSAttributedStringM.insert({"initWithString:", 0});
+ NSAttributedStringM.insert({"initWithString:attributes:", 0});
+}
+
+/// Initializes a list of methods and C functions that return a localized string
+void NonLocalizedStringChecker::initLocStringsMethods(ASTContext &Ctx) const {
+ if (!LSM.empty())
+ return;
+
+ LSM.insert({"NSBundle", "localizedStringForKey:value:table:"});
+ LSM.insert({"NSDateFormatter", "stringFromDate:"});
+ LSM.insert(
+ {"NSDateFormatter", "localizedStringFromDate:dateStyle:timeStyle:"});
+ LSM.insert({"NSNumberFormatter", "stringFromNumber:"});
+ LSM.insert({"UITextField", "text"});
+ LSM.insert({"UITextView", "text"});
+ LSM.insert({"UILabel", "text"});
+
+ LSF.insert("CFDateFormatterCreateStringWithDate");
+ LSF.insert("CFDateFormatterCreateStringWithAbsoluteTime");
+ LSF.insert("CFNumberFormatterCreateStringWithNumber");
+}
+
+/// Checks to see if the method / function declaration includes
+/// __attribute__((annotate("returns_localized_nsstring")))
+bool NonLocalizedStringChecker::isAnnotatedAsLocalized(const Decl *D) const {
+ return std::any_of(
+ D->specific_attr_begin<AnnotateAttr>(),
+ D->specific_attr_end<AnnotateAttr>(), [](const AnnotateAttr *Ann) {
+ return Ann->getAnnotation() == "returns_localized_nsstring";
+ });
+}
+
+/// Returns true if the given SVal is marked as Localized in the program state
+bool NonLocalizedStringChecker::hasLocalizedState(SVal S,
+ CheckerContext &C) const {
+ const MemRegion *mt = S.getAsRegion();
+ if (mt) {
+ const LocalizedState *LS = C.getState()->get<LocalizedMemMap>(mt);
+ if (LS && LS->isLocalized())
+ return true;
+ }
+ return false;
+}
+
+/// Returns true if the given SVal is marked as NonLocalized in the program
+/// state
+bool NonLocalizedStringChecker::hasNonLocalizedState(SVal S,
+ CheckerContext &C) const {
+ const MemRegion *mt = S.getAsRegion();
+ if (mt) {
+ const LocalizedState *LS = C.getState()->get<LocalizedMemMap>(mt);
+ if (LS && LS->isNonLocalized())
+ return true;
+ }
+ return false;
+}
+
+/// Marks the given SVal as Localized in the program state
+void NonLocalizedStringChecker::setLocalizedState(const SVal S,
+ CheckerContext &C) const {
+ const MemRegion *mt = S.getAsRegion();
+ if (mt) {
+ ProgramStateRef State =
+ C.getState()->set<LocalizedMemMap>(mt, LocalizedState::getLocalized());
+ C.addTransition(State);
+ }
+}
+
+/// Marks the given SVal as NonLocalized in the program state
+void NonLocalizedStringChecker::setNonLocalizedState(const SVal S,
+ CheckerContext &C) const {
+ const MemRegion *mt = S.getAsRegion();
+ if (mt) {
+ ProgramStateRef State = C.getState()->set<LocalizedMemMap>(
+ mt, LocalizedState::getNonLocalized());
+ C.addTransition(State);
+ }
+}
+
+/// Reports a localization error for the passed in method call and SVal
+void NonLocalizedStringChecker::reportLocalizationError(
+ SVal S, const ObjCMethodCall &M, CheckerContext &C,
+ int argumentNumber) const {
+
+ ExplodedNode *ErrNode = C.getPredecessor();
+ static CheckerProgramPointTag Tag("NonLocalizedStringChecker",
+ "UnlocalizedString");
+ ErrNode = C.addTransition(C.getState(), C.getPredecessor(), &Tag);
+
+ if (!ErrNode)
+ return;
+
+ // Generate the bug report.
+ std::unique_ptr<BugReport> R(
+ new BugReport(*BT, "String should be localized", ErrNode));
+ if (argumentNumber) {
+ R->addRange(M.getArgExpr(argumentNumber - 1)->getSourceRange());
+ } else {
+ R->addRange(M.getSourceRange());
+ }
+ R->markInteresting(S);
+ C.emitReport(std::move(R));
+}
+
+/// Check if the string being passed in has NonLocalized state
+void NonLocalizedStringChecker::checkPreObjCMessage(const ObjCMethodCall &msg,
+ CheckerContext &C) const {
+ initUIMethods(C.getASTContext());
+
+ const ObjCInterfaceDecl *OD = msg.getReceiverInterface();
+ if (!OD)
+ return;
+ const IdentifierInfo *odInfo = OD->getIdentifier();
+
+ Selector S = msg.getSelector();
+
+ std::string SelectorString = S.getAsString();
+ StringRef SelectorName = SelectorString;
+ assert(!SelectorName.empty());
+
+ auto method = UIMethods.find(odInfo->getName());
+ if (odInfo->isStr("NSString")) {
+ // Handle the case where the receiver is an NSString
+ // These special NSString methods draw to the screen
+
+ if (!(SelectorName.startswith("drawAtPoint") ||
+ SelectorName.startswith("drawInRect") ||
+ SelectorName.startswith("drawWithRect")))
+ return;
+
+ SVal svTitle = msg.getReceiverSVal();
+
+ bool isNonLocalized = hasNonLocalizedState(svTitle, C);
+
+ if (isNonLocalized) {
+ reportLocalizationError(svTitle, msg, C);
+ }
+ } else if (method != UIMethods.end()) {
+
+ auto argumentIterator = method->getValue().find(SelectorName);
+
+ if (argumentIterator == method->getValue().end())
+ return;
+
+ int argumentNumber = argumentIterator->getValue();
+
+ SVal svTitle = msg.getArgSVal(argumentNumber);
+
+ if (const ObjCStringRegion *SR =
+ dyn_cast_or_null<ObjCStringRegion>(svTitle.getAsRegion())) {
+ StringRef stringValue =
+ SR->getObjCStringLiteral()->getString()->getString();
+ if ((stringValue.trim().size() == 0 && stringValue.size() > 0) ||
+ stringValue.empty())
+ return;
+ if (!IsAggressive && llvm::sys::unicode::columnWidthUTF8(stringValue) < 2)
+ return;
+ }
+
+ bool isNonLocalized = hasNonLocalizedState(svTitle, C);
+
+ if (isNonLocalized) {
+ reportLocalizationError(svTitle, msg, C, argumentNumber + 1);
+ }
+ }
+}
+
+static inline bool isNSStringType(QualType T, ASTContext &Ctx) {
+
+ const ObjCObjectPointerType *PT = T->getAs<ObjCObjectPointerType>();
+ if (!PT)
+ return false;
+
+ ObjCInterfaceDecl *Cls = PT->getObjectType()->getInterface();
+ if (!Cls)
+ return false;
+
+ IdentifierInfo *ClsName = Cls->getIdentifier();
+
+ // FIXME: Should we walk the chain of classes?
+ return ClsName == &Ctx.Idents.get("NSString") ||
+ ClsName == &Ctx.Idents.get("NSMutableString");
+}
+
+/// Marks a string being returned by any call as localized
+/// if it is in LocStringFunctions (LSF) or the function is annotated.
+/// Otherwise, we mark it as NonLocalized (Aggressive) or
+/// NonLocalized only if it is not backed by a SymRegion (Non-Aggressive),
+/// basically leaving only string literals as NonLocalized.
+void NonLocalizedStringChecker::checkPostCall(const CallEvent &Call,
+ CheckerContext &C) const {
+ initLocStringsMethods(C.getASTContext());
+
+ if (!Call.getOriginExpr())
+ return;
+
+ // Anything that takes in a localized NSString as an argument
+ // and returns an NSString will be assumed to be returning a
+ // localized NSString. (Counter: Incorrectly combining two LocalizedStrings)
+ const QualType RT = Call.getResultType();
+ if (isNSStringType(RT, C.getASTContext())) {
+ for (unsigned i = 0; i < Call.getNumArgs(); ++i) {
+ SVal argValue = Call.getArgSVal(i);
+ if (hasLocalizedState(argValue, C)) {
+ SVal sv = Call.getReturnValue();
+ setLocalizedState(sv, C);
+ return;
+ }
+ }
+ }
+
+ const Decl *D = Call.getDecl();
+ if (!D)
+ return;
+
+ StringRef IdentifierName = C.getCalleeName(D->getAsFunction());
+
+ SVal sv = Call.getReturnValue();
+ if (isAnnotatedAsLocalized(D) || LSF.find(IdentifierName) != LSF.end()) {
+ setLocalizedState(sv, C);
+ } else if (isNSStringType(RT, C.getASTContext()) &&
+ !hasLocalizedState(sv, C)) {
+ if (IsAggressive) {
+ setNonLocalizedState(sv, C);
+ } else {
+ const SymbolicRegion *SymReg =
+ dyn_cast_or_null<SymbolicRegion>(sv.getAsRegion());
+ if (!SymReg)
+ setNonLocalizedState(sv, C);
+ }
+ }
+}
+
+/// Marks a string being returned by an ObjC method as localized
+/// if it is in LocStringMethods or the method is annotated
+void NonLocalizedStringChecker::checkPostObjCMessage(const ObjCMethodCall &msg,
+ CheckerContext &C) const {
+ initLocStringsMethods(C.getASTContext());
+
+ if (!msg.isInstanceMessage())
+ return;
+
+ const ObjCInterfaceDecl *OD = msg.getReceiverInterface();
+ if (!OD)
+ return;
+ const IdentifierInfo *odInfo = OD->getIdentifier();
+
+ StringRef IdentifierName = odInfo->getName();
+
+ Selector S = msg.getSelector();
+ std::string SelectorName = S.getAsString();
+
+ std::pair<StringRef, StringRef> MethodDescription = {IdentifierName,
+ SelectorName};
+
+ if (LSM.count(MethodDescription) || isAnnotatedAsLocalized(msg.getDecl())) {
+ SVal sv = msg.getReturnValue();
+ setLocalizedState(sv, C);
+ }
+}
+
+/// Marks all empty string literals as localized
+void NonLocalizedStringChecker::checkPostStmt(const ObjCStringLiteral *SL,
+ CheckerContext &C) const {
+ SVal sv = C.getSVal(SL);
+ setNonLocalizedState(sv, C);
+}
+
+namespace {
+class EmptyLocalizationContextChecker
+ : public Checker<check::ASTDecl<ObjCImplementationDecl>> {
+
+ // A helper class, which walks the AST
+ class MethodCrawler : public ConstStmtVisitor<MethodCrawler> {
+ const ObjCMethodDecl *MD;
+ BugReporter &BR;
+ AnalysisManager &Mgr;
+ const CheckerBase *Checker;
+ LocationOrAnalysisDeclContext DCtx;
+
+ public:
+ MethodCrawler(const ObjCMethodDecl *InMD, BugReporter &InBR,
+ const CheckerBase *Checker, AnalysisManager &InMgr,
+ AnalysisDeclContext *InDCtx)
+ : MD(InMD), BR(InBR), Mgr(InMgr), Checker(Checker), DCtx(InDCtx) {}
+
+ void VisitStmt(const Stmt *S) { VisitChildren(S); }
+
+ void VisitObjCMessageExpr(const ObjCMessageExpr *ME);
+
+ void reportEmptyContextError(const ObjCMessageExpr *M) const;
+
+ void VisitChildren(const Stmt *S) {
+ for (const Stmt *Child : S->children()) {
+ if (Child)
+ this->Visit(Child);
+ }
+ }
+ };
+
+public:
+ void checkASTDecl(const ObjCImplementationDecl *D, AnalysisManager &Mgr,
+ BugReporter &BR) const;
+};
+} // end anonymous namespace
+
+void EmptyLocalizationContextChecker::checkASTDecl(
+ const ObjCImplementationDecl *D, AnalysisManager &Mgr,
+ BugReporter &BR) const {
+
+ for (const ObjCMethodDecl *M : D->methods()) {
+ AnalysisDeclContext *DCtx = Mgr.getAnalysisDeclContext(M);
+
+ const Stmt *Body = M->getBody();
+ assert(Body);
+
+ MethodCrawler MC(M->getCanonicalDecl(), BR, this, Mgr, DCtx);
+ MC.VisitStmt(Body);
+ }
+}
+
+/// This check attempts to match these macros, assuming they are defined as
+/// follows:
+///
+/// #define NSLocalizedString(key, comment) \
+/// [[NSBundle mainBundle] localizedStringForKey:(key) value:@"" table:nil]
+/// #define NSLocalizedStringFromTable(key, tbl, comment) \
+/// [[NSBundle mainBundle] localizedStringForKey:(key) value:@"" table:(tbl)]
+/// #define NSLocalizedStringFromTableInBundle(key, tbl, bundle, comment) \
+/// [bundle localizedStringForKey:(key) value:@"" table:(tbl)]
+/// #define NSLocalizedStringWithDefaultValue(key, tbl, bundle, val, comment)
+///
+/// We cannot use the path sensitive check because the macro argument we are
+/// checking for (comment) is not used and thus not present in the AST,
+/// so we use Lexer on the original macro call and retrieve the value of
+/// the comment. If it's empty or nil, we raise a warning.
+void EmptyLocalizationContextChecker::MethodCrawler::VisitObjCMessageExpr(
+ const ObjCMessageExpr *ME) {
+
+ const ObjCInterfaceDecl *OD = ME->getReceiverInterface();
+ if (!OD)
+ return;
+
+ const IdentifierInfo *odInfo = OD->getIdentifier();
+
+ if (!(odInfo->isStr("NSBundle") ||
+ ME->getSelector().getAsString() ==
+ "localizedStringForKey:value:table:")) {
+ return;
+ }
+
+ SourceRange R = ME->getSourceRange();
+ if (!R.getBegin().isMacroID())
+ return;
+
+ // getImmediateMacroCallerLoc gets the location of the immediate macro
+ // caller, one level up the stack toward the initial macro typed into the
+ // source, so SL should point to the NSLocalizedString macro.
+ SourceLocation SL =
+ Mgr.getSourceManager().getImmediateMacroCallerLoc(R.getBegin());
+ std::pair<FileID, unsigned> SLInfo =
+ Mgr.getSourceManager().getDecomposedLoc(SL);
+
+ SrcMgr::SLocEntry SE = Mgr.getSourceManager().getSLocEntry(SLInfo.first);
+
+ // If NSLocalizedString macro is wrapped in another macro, we need to
+ // unwrap the expansion until we get to the NSLocalizedStringMacro.
+ while (SE.isExpansion()) {
+ SL = SE.getExpansion().getSpellingLoc();
+ SLInfo = Mgr.getSourceManager().getDecomposedLoc(SL);
+ SE = Mgr.getSourceManager().getSLocEntry(SLInfo.first);
+ }
+
+ llvm::MemoryBuffer *BF = SE.getFile().getContentCache()->getRawBuffer();
+ Lexer TheLexer(SL, LangOptions(), BF->getBufferStart(),
+ BF->getBufferStart() + SLInfo.second, BF->getBufferEnd());
+
+ Token I;
+ Token Result; // This will hold the token just before the last ')'
+ int p_count = 0; // This is for parenthesis matching
+ while (!TheLexer.LexFromRawLexer(I)) {
+ if (I.getKind() == tok::l_paren)
+ ++p_count;
+ if (I.getKind() == tok::r_paren) {
+ if (p_count == 1)
+ break;
+ --p_count;
+ }
+ Result = I;
+ }
+
+ if (isAnyIdentifier(Result.getKind())) {
+ if (Result.getRawIdentifier().equals("nil")) {
+ reportEmptyContextError(ME);
+ return;
+ }
+ }
+
+ if (!isStringLiteral(Result.getKind()))
+ return;
+
+ StringRef Comment =
+ StringRef(Result.getLiteralData(), Result.getLength()).trim("\"");
+
+ if ((Comment.trim().size() == 0 && Comment.size() > 0) || // Is Whitespace
+ Comment.empty()) {
+ reportEmptyContextError(ME);
+ }
+}
+
+void EmptyLocalizationContextChecker::MethodCrawler::reportEmptyContextError(
+ const ObjCMessageExpr *ME) const {
+ // Generate the bug report.
+ BR.EmitBasicReport(MD, Checker, "Context Missing", "Localizability Error",
+ "Localized string macro should include a non-empty "
+ "comment for translators",
+ PathDiagnosticLocation(ME, BR.getSourceManager(), DCtx));
+}
+
+//===----------------------------------------------------------------------===//
+// Checker registration.
+//===----------------------------------------------------------------------===//
+
+void ento::registerNonLocalizedStringChecker(CheckerManager &mgr) {
+ NonLocalizedStringChecker *checker =
+ mgr.registerChecker<NonLocalizedStringChecker>();
+ checker->IsAggressive =
+ mgr.getAnalyzerOptions().getBooleanOption("AggressiveReport", false);
+}
+
+void ento::registerEmptyLocalizationContextChecker(CheckerManager &mgr) {
+ mgr.registerChecker<EmptyLocalizationContextChecker>();
+}
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