C++ StringLiteral类代码示例

void AnsiTerminalLoggerSink::log(LogMessage const& message) {
    MutexLock l(_mutex);

    StringLiteral const WhenColorStart = BlueColorStart;
    StringLiteral const ThreadNameColorStart = MagentaColorStart;
    StringLiteral const AuthorColorStart = GreenColorStart;
    StringLiteral const LogLevelColorStart = LogLevelColorMapper()(message.level);

    printf(
        "%s[%s]%s %s{%s}%s %s[%s]%s %s[%s]%s %s%s%s\n",
        WhenColorStart.c_str(),
        to_string(message.when).c_str(),
        AttributeReset.c_str(),
        ThreadNameColorStart.c_str(),
        message.thread->c_str(),
        AttributeReset.c_str(),
        AuthorColorStart.c_str(),
        message.author.c_str(),
        AttributeReset.c_str(),
        LogLevelColorStart.c_str(),
        message.level.to_string().c_str(),
        AttributeReset.c_str(),
        LogLevelColorStart.c_str(),
        message.message.c_str(),
        AttributeReset.c_str());
}

    static void read_and_verify_archive_file_signature(fstream& fs)
    {
        static constexpr StringLiteral FILE_START = "!<arch>\n";
        static constexpr size_t FILE_START_SIZE = 8;

        fs.seekg(std::fstream::beg);

        char file_start[FILE_START_SIZE];
        fs.read(file_start, FILE_START_SIZE);
        verify_equal_strings(VCPKG_LINE_INFO, FILE_START.c_str(), file_start, FILE_START_SIZE, "LIB FILE_START");
    }

void QStringAllocations::VisitFromLatin1OrUtf8(Stmt *stmt)
{
    CallExpr *callExpr = dyn_cast<CallExpr>(stmt);
    if (!callExpr)
        return;

    FunctionDecl *functionDecl = callExpr->getDirectCallee();
    if (!StringUtils::functionIsOneOf(functionDecl, {"fromLatin1", "fromUtf8"}))
        return;

    CXXMethodDecl *methodDecl = dyn_cast<CXXMethodDecl>(functionDecl);
    if (!StringUtils::isOfClass(methodDecl, "QString"))
        return;

    if (!Utils::callHasDefaultArguments(callExpr) || !hasCharPtrArgument(functionDecl, 2)) // QString::fromLatin1("foo", 1) is ok
        return;

    if (!containsStringLiteralNoCallExpr(callExpr))
        return;

    if (!isOptionSet("no-msvc-compat")) {
        StringLiteral *lt = stringLiteralForCall(callExpr);
        if (lt && lt->getNumConcatenated() > 1) {
            return; // Nothing to do here, MSVC doesn't like it
        }
    }

    vector<ConditionalOperator*> ternaries;
    HierarchyUtils::getChilds(callExpr, ternaries, 2);
    if (!ternaries.empty()) {
        auto ternary = ternaries[0];
        if (Utils::ternaryOperatorIsOfStringLiteral(ternary)) {
            emitWarning(stmt->getLocStart(), string("QString::fromLatin1() being passed a literal"));
        }

        return;
    }

    std::vector<FixItHint> fixits;

    if (isFixitEnabled(FromLatin1_FromUtf8Allocations)) {
        const FromFunction fromFunction = functionDecl->getNameAsString() == "fromLatin1" ? FromLatin1 : FromUtf8;
        fixits = fixItReplaceFromLatin1OrFromUtf8(callExpr, fromFunction);
    }

    if (functionDecl->getNameAsString() == "fromLatin1") {
        emitWarning(stmt->getLocStart(), string("QString::fromLatin1() being passed a literal"), fixits);
    } else {
        emitWarning(stmt->getLocStart(), string("QString::fromUtf8() being passed a literal"), fixits);
    }
}

    static void read_and_verify_pe_signature(fstream& fs)
    {
        static constexpr size_t OFFSET_TO_PE_SIGNATURE_OFFSET = 0x3c;

        static constexpr StringLiteral PE_SIGNATURE = "PE\0\0";
        static constexpr size_t PE_SIGNATURE_SIZE = 4;

        fs.seekg(OFFSET_TO_PE_SIGNATURE_OFFSET, ios_base::beg);
        const auto offset_to_pe_signature = read_value_from_stream<int32_t>(fs);

        fs.seekg(offset_to_pe_signature);
        char signature[PE_SIGNATURE_SIZE];
        fs.read(signature, PE_SIGNATURE_SIZE);
        verify_equal_strings(VCPKG_LINE_INFO, PE_SIGNATURE.c_str(), signature, PE_SIGNATURE_SIZE, "PE_SIGNATURE");
        fs.seekg(offset_to_pe_signature + PE_SIGNATURE_SIZE, ios_base::beg);
    }

        static ArchiveMemberHeader read(fstream& fs)
        {
            static constexpr size_t HEADER_END_OFFSET = 58;
            static constexpr StringLiteral HEADER_END = "`\n";
            static constexpr size_t HEADER_END_SIZE = 2;

            ArchiveMemberHeader ret;
            ret.data.resize(HEADER_SIZE);
            fs.read(&ret.data[0], HEADER_SIZE);

            if (ret.data[0] != '\0') // Due to freeglut. github issue #223
            {
                const std::string header_end = ret.data.substr(HEADER_END_OFFSET, HEADER_END_SIZE);
                verify_equal_strings(
                    VCPKG_LINE_INFO, HEADER_END.c_str(), header_end.c_str(), HEADER_END_SIZE, "LIB HEADER_END");
            }

            return ret;
        }

void TypeDescriptionReader::readExports(UiScriptBinding *ast, FakeMetaObject::Ptr fmo)
{
    if (!ast || !ast->statement) {
        addError(ast->colonToken, tr("Expected array of strings after colon."));
        return;
    }

    ExpressionStatement *expStmt = dynamic_cast<ExpressionStatement *>(ast->statement);
    if (!expStmt) {
        addError(ast->statement->firstSourceLocation(), tr("Expected array of strings after colon."));
        return;
    }

    ArrayLiteral *arrayLit = dynamic_cast<ArrayLiteral *>(expStmt->expression);
    if (!arrayLit) {
        addError(expStmt->firstSourceLocation(), tr("Expected array of strings after colon."));
        return;
    }

    for (ElementList *it = arrayLit->elements; it; it = it->next) {
        StringLiteral *stringLit = dynamic_cast<StringLiteral *>(it->expression);
        if (!stringLit) {
            addError(arrayLit->firstSourceLocation(), tr("Expected array literal with only string literal members."));
            return;
        }
        QString exp = stringLit->value.toString();
        int slashIdx = exp.indexOf(QLatin1Char('/'));
        int spaceIdx = exp.indexOf(QLatin1Char(' '));
        ComponentVersion version(exp.mid(spaceIdx + 1));

        if (spaceIdx == -1 || !version.isValid()) {
            addError(stringLit->firstSourceLocation(), tr("Expected string literal to contain 'Package/Name major.minor' or 'Name major.minor'."));
            continue;
        }
        QString package;
        if (slashIdx != -1)
            package = exp.left(slashIdx);
        QString name = exp.mid(slashIdx + 1, spaceIdx - (slashIdx+1));

        // ### relocatable exports where package is empty?
        fmo->addExport(name, package, version);
    }
}

StmtResult Sema::ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
                                 bool IsVolatile, unsigned NumOutputs,
                                 unsigned NumInputs, IdentifierInfo **Names,
                                 MultiExprArg constraints, MultiExprArg Exprs,
                                 Expr *asmString, MultiExprArg clobbers,
                                 SourceLocation RParenLoc) {
  unsigned NumClobbers = clobbers.size();
  StringLiteral **Constraints =
    reinterpret_cast<StringLiteral**>(constraints.data());
  StringLiteral *AsmString = cast<StringLiteral>(asmString);
  StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.data());

  SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos;

  // The parser verifies that there is a string literal here.
  if (!AsmString->isAscii())
    return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character)
      << AsmString->getSourceRange());

  for (unsigned i = 0; i != NumOutputs; i++) {
    StringLiteral *Literal = Constraints[i];
    if (!Literal->isAscii())
      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
        << Literal->getSourceRange());

    StringRef OutputName;
    if (Names[i])
      OutputName = Names[i]->getName();

    TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName);
    if (!Context.getTargetInfo().validateOutputConstraint(Info))
      return StmtError(Diag(Literal->getLocStart(),
                            diag::err_asm_invalid_output_constraint)
                       << Info.getConstraintStr());

    // Check that the output exprs are valid lvalues.
    Expr *OutputExpr = Exprs[i];
    if (CheckAsmLValue(OutputExpr, *this))
      return StmtError(Diag(OutputExpr->getLocStart(),
                            diag::err_asm_invalid_lvalue_in_output)
                       << OutputExpr->getSourceRange());

    if (RequireCompleteType(OutputExpr->getLocStart(), Exprs[i]->getType(),
                            diag::err_dereference_incomplete_type))
      return StmtError();

    OutputConstraintInfos.push_back(Info);
  }

  SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos;

  for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) {
    StringLiteral *Literal = Constraints[i];
    if (!Literal->isAscii())
      return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character)
        << Literal->getSourceRange());

    StringRef InputName;
    if (Names[i])
      InputName = Names[i]->getName();

    TargetInfo::ConstraintInfo Info(Literal->getString(), InputName);
    if (!Context.getTargetInfo().validateInputConstraint(OutputConstraintInfos.data(),
                                                NumOutputs, Info)) {
      return StmtError(Diag(Literal->getLocStart(),
                            diag::err_asm_invalid_input_constraint)
                       << Info.getConstraintStr());
    }

    Expr *InputExpr = Exprs[i];

    // Only allow void types for memory constraints.
    if (Info.allowsMemory() && !Info.allowsRegister()) {
      if (CheckAsmLValue(InputExpr, *this))
        return StmtError(Diag(InputExpr->getLocStart(),
                              diag::err_asm_invalid_lvalue_in_input)
                         << Info.getConstraintStr()
                         << InputExpr->getSourceRange());
    } else {
      ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]);
      if (Result.isInvalid())
        return StmtError();

      Exprs[i] = Result.get();
    }

    if (Info.allowsRegister()) {
      if (InputExpr->getType()->isVoidType()) {
        return StmtError(Diag(InputExpr->getLocStart(),
                              diag::err_asm_invalid_type_in_input)
          << InputExpr->getType() << Info.getConstraintStr()
          << InputExpr->getSourceRange());
      }
    }

    InputConstraintInfos.push_back(Info);

    const Type *Ty = Exprs[i]->getType().getTypePtr();
    if (Ty->isDependentType())
      continue;
//.........这里部分代码省略.........

TEST(OOModel, JavaLibraryAndHelloWorldTest)
{
	Model::Model model;
	Project* prj = dynamic_cast<Project*> (model.createRoot("Project"));

	model.beginModification(prj, "build simple java library and a hello world app");
	prj->setName("HelloWorld");

	// Build a simple Java Library
	Library* java = prj->libraries()->append<Library>();
	java->setName("Java");

	Class* string = java->classes()->append<Class>();
	string->setName("String");
	string->setVisibility(Visibility::PUBLIC);

	Module* io = java->modules()->append<Module>();
	io->setName("io");

	Class* printstream = io->classes()->append<Class>();
	printstream->setName("PrintStream");
	printstream->setVisibility(Visibility::PUBLIC);

	Method* println = printstream->methods()->append<Method>();
	println->setName("println");
	println->setVisibility(Visibility::PUBLIC);

	FormalArgument* arg = println->arguments()->append<FormalArgument>();
	arg->setName("x");
	NamedType* argType = arg->setType<NamedType>();
	argType->type()->ref()->set("class:String");

	Class* system = java->classes()->append<Class>();
	system->setName("System");
	system->setVisibility(Visibility::PUBLIC);
	Field* out = system->fields()->append<Field>();
	out->setName("out");
	out->setVisibility(Visibility::PUBLIC);
	out->setStorageSpecifier(StorageSpecifier::CLASS_VARIABLE);
	NamedType* outtype = out->setType<NamedType>();
	outtype->type()->ref()->set("class:PrintStream");
	outtype->type()->setPrefix<ReferenceExpression>()->ref()->set("mod:io");

	// Build a simple HelloWorld Application
	Class* hello = prj->classes()->append<Class>();
	hello->setName("HelloWorld");
	hello->setVisibility(Visibility::PUBLIC);
	Method* main = hello->methods()->append<Method>();

	main->setName("main");
	main->setVisibility(Visibility::PUBLIC);
	main->setStorageSpecifier(StorageSpecifier::CLASS_VARIABLE);
	//TODO make an array argument

	MethodCallStatement* callPrintln = main->items()->append<MethodCallStatement>();
	StringLiteral* helloStr = callPrintln->arguments()->append<StringLiteral>();
	helloStr->setValue("Hello World");
	callPrintln->ref()->set("met:println");

	VariableAccess* va = callPrintln->setPrefix<VariableAccess>();
	va->ref()->set("field:out");

	ReferenceExpression* ref = va->setPrefix<ReferenceExpression>();
	ref->ref()->set("lib:Java,class:System");

	model.endModification();

	CHECK_STR_EQUAL("Java", java->name());
	CHECK_CONDITION(callPrintln->methodDefinition() != nullptr);
	CHECK_CONDITION(callPrintln->methodDefinition() == println);
}

StmtResult Sema::ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
                                 bool IsVolatile, unsigned NumOutputs,
                                 unsigned NumInputs, IdentifierInfo **Names,
                                 MultiExprArg constraints, MultiExprArg Exprs,
                                 Expr *asmString, MultiExprArg clobbers,
                                 SourceLocation RParenLoc) {
  unsigned NumClobbers = clobbers.size();
  StringLiteral **Constraints =
    reinterpret_cast<StringLiteral**>(constraints.data());
  StringLiteral *AsmString = cast<StringLiteral>(asmString);
  StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.data());

  SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos;

  // The parser verifies that there is a string literal here.
  assert(AsmString->isAscii());

  bool ValidateConstraints =
      DeclAttrsMatchCUDAMode(getLangOpts(), getCurFunctionDecl());

  for (unsigned i = 0; i != NumOutputs; i++) {
    StringLiteral *Literal = Constraints[i];
    assert(Literal->isAscii());

    StringRef OutputName;
    if (Names[i])
      OutputName = Names[i]->getName();

    TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName);
    if (ValidateConstraints &&
        !Context.getTargetInfo().validateOutputConstraint(Info))
      return StmtError(Diag(Literal->getLocStart(),
                            diag::err_asm_invalid_output_constraint)
                       << Info.getConstraintStr());

    ExprResult ER = CheckPlaceholderExpr(Exprs[i]);
    if (ER.isInvalid())
      return StmtError();
    Exprs[i] = ER.get();

    // Check that the output exprs are valid lvalues.
    Expr *OutputExpr = Exprs[i];

    // Referring to parameters is not allowed in naked functions.
    if (CheckNakedParmReference(OutputExpr, *this))
      return StmtError();

    // Bitfield can't be referenced with a pointer.
    if (Info.allowsMemory() && OutputExpr->refersToBitField())
      return StmtError(Diag(OutputExpr->getLocStart(),
                            diag::err_asm_bitfield_in_memory_constraint)
                       << 1
                       << Info.getConstraintStr()
                       << OutputExpr->getSourceRange());

    OutputConstraintInfos.push_back(Info);

    // If this is dependent, just continue.
    if (OutputExpr->isTypeDependent())
      continue;

    Expr::isModifiableLvalueResult IsLV =
        OutputExpr->isModifiableLvalue(Context, /*Loc=*/nullptr);
    switch (IsLV) {
    case Expr::MLV_Valid:
      // Cool, this is an lvalue.
      break;
    case Expr::MLV_ArrayType:
      // This is OK too.
      break;
    case Expr::MLV_LValueCast: {
      const Expr *LVal = OutputExpr->IgnoreParenNoopCasts(Context);
      if (!getLangOpts().HeinousExtensions) {
        Diag(LVal->getLocStart(), diag::err_invalid_asm_cast_lvalue)
            << OutputExpr->getSourceRange();
      } else {
        Diag(LVal->getLocStart(), diag::warn_invalid_asm_cast_lvalue)
            << OutputExpr->getSourceRange();
      }
      // Accept, even if we emitted an error diagnostic.
      break;
    }
    case Expr::MLV_IncompleteType:
    case Expr::MLV_IncompleteVoidType:
      if (RequireCompleteType(OutputExpr->getLocStart(), Exprs[i]->getType(),
                              diag::err_dereference_incomplete_type))
        return StmtError();
    default:
      return StmtError(Diag(OutputExpr->getLocStart(),
                            diag::err_asm_invalid_lvalue_in_output)
                       << OutputExpr->getSourceRange());
    }

    unsigned Size = Context.getTypeSize(OutputExpr->getType());
    if (!Context.getTargetInfo().validateOutputSize(Literal->getString(),
                                                    Size))
      return StmtError(Diag(OutputExpr->getLocStart(),
                            diag::err_asm_invalid_output_size)
                       << Info.getConstraintStr());
  }
//.........这里部分代码省略.........

ExprResult Sema::ParseObjCStringLiteral(SourceLocation *AtLocs,
                                        Expr **strings,
                                        unsigned NumStrings) {
  StringLiteral **Strings = reinterpret_cast<StringLiteral**>(strings);

  // Most ObjC strings are formed out of a single piece.  However, we *can*
  // have strings formed out of multiple @ strings with multiple pptokens in
  // each one, e.g. @"foo" "bar" @"baz" "qux"   which need to be turned into one
  // StringLiteral for ObjCStringLiteral to hold onto.
  StringLiteral *S = Strings[0];

  // If we have a multi-part string, merge it all together.
  if (NumStrings != 1) {
    // Concatenate objc strings.
    llvm::SmallString<128> StrBuf;
    llvm::SmallVector<SourceLocation, 8> StrLocs;

    for (unsigned i = 0; i != NumStrings; ++i) {
      S = Strings[i];

      // ObjC strings can't be wide.
      if (S->isWide()) {
        Diag(S->getLocStart(), diag::err_cfstring_literal_not_string_constant)
          << S->getSourceRange();
        return true;
      }

      // Append the string.
      StrBuf += S->getString();

      // Get the locations of the string tokens.
      StrLocs.append(S->tokloc_begin(), S->tokloc_end());
    }

    // Create the aggregate string with the appropriate content and location
    // information.
    S = StringLiteral::Create(Context, &StrBuf[0], StrBuf.size(), false,
                              Context.getPointerType(Context.CharTy),
                              &StrLocs[0], StrLocs.size());
  }

  // Verify that this composite string is acceptable for ObjC strings.
  if (CheckObjCString(S))
    return true;

  // Initialize the constant string interface lazily. This assumes
  // the NSString interface is seen in this translation unit. Note: We
  // don't use NSConstantString, since the runtime team considers this
  // interface private (even though it appears in the header files).
  QualType Ty = Context.getObjCConstantStringInterface();
  if (!Ty.isNull()) {
    Ty = Context.getObjCObjectPointerType(Ty);
  } else if (getLangOptions().NoConstantCFStrings) {
    IdentifierInfo *NSIdent=0;
    std::string StringClass(getLangOptions().ObjCConstantStringClass);
    
    if (StringClass.empty())
      NSIdent = &Context.Idents.get("NSConstantString");
    else
      NSIdent = &Context.Idents.get(StringClass);
    
    NamedDecl *IF = LookupSingleName(TUScope, NSIdent, AtLocs[0],
                                     LookupOrdinaryName);
    if (ObjCInterfaceDecl *StrIF = dyn_cast_or_null<ObjCInterfaceDecl>(IF)) {
      Context.setObjCConstantStringInterface(StrIF);
      Ty = Context.getObjCConstantStringInterface();
      Ty = Context.getObjCObjectPointerType(Ty);
    } else {
      // If there is no NSConstantString interface defined then treat this
      // as error and recover from it.
      Diag(S->getLocStart(), diag::err_no_nsconstant_string_class) << NSIdent
        << S->getSourceRange();
      Ty = Context.getObjCIdType();
    }
  } else {
    IdentifierInfo *NSIdent = &Context.Idents.get("NSString");
    NamedDecl *IF = LookupSingleName(TUScope, NSIdent, AtLocs[0],
                                     LookupOrdinaryName);
    if (ObjCInterfaceDecl *StrIF = dyn_cast_or_null<ObjCInterfaceDecl>(IF)) {
      Context.setObjCConstantStringInterface(StrIF);
      Ty = Context.getObjCConstantStringInterface();
      Ty = Context.getObjCObjectPointerType(Ty);
    } else {
      // If there is no NSString interface defined then treat constant
      // strings as untyped objects and let the runtime figure it out later.
      Ty = Context.getObjCIdType();
    }
  }

  return new (Context) ObjCStringLiteral(S, Ty, AtLocs[0]);
}

 inline bool
 operator!= (StringLiteral const& a, StringLiteral const& b)
 {
   return a.literal () != b.literal ();
 }