LiteralSupport.cpp File Reference

#include "clang/Lex/LiteralSupport.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Lex/LexDiagnostic.h"
#include "clang/Lex/Lexer.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/Token.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <string>

Include dependency graph for LiteralSupport.cpp:

Go to the source code of this file.

Functions
static unsigned	getCharWidth (tok::TokenKind kind, const TargetInfo &Target)
static CharSourceRange	MakeCharSourceRange (const LangOptions &Features, FullSourceLoc TokLoc, const char *TokBegin, const char *TokRangeBegin, const char *TokRangeEnd)
static DiagnosticBuilder	Diag (DiagnosticsEngine *Diags, const LangOptions &Features, FullSourceLoc TokLoc, const char *TokBegin, const char *TokRangeBegin, const char *TokRangeEnd, unsigned DiagID)
	Produce a diagnostic highlighting some portion of a literal. More...
static unsigned	ProcessCharEscape (const char *ThisTokBegin, const char *&ThisTokBuf, const char *ThisTokEnd, bool &HadError, FullSourceLoc Loc, unsigned CharWidth, DiagnosticsEngine *Diags, const LangOptions &Features)
	ProcessCharEscape - Parse a standard C escape sequence, which can occur in either a character or a string literal. More...
static void	appendCodePoint (unsigned Codepoint, llvm::SmallVectorImpl< char > &Str)
static bool	ProcessUCNEscape (const char *ThisTokBegin, const char *&ThisTokBuf, const char *ThisTokEnd, uint32_t &UcnVal, unsigned short &UcnLen, FullSourceLoc Loc, DiagnosticsEngine *Diags, const LangOptions &Features, bool in_char_string_literal=false)
	ProcessUCNEscape - Read the Universal Character Name, check constraints and return the UTF32. More...
static int	MeasureUCNEscape (const char *ThisTokBegin, const char *&ThisTokBuf, const char *ThisTokEnd, unsigned CharByteWidth, const LangOptions &Features, bool &HadError)
	MeasureUCNEscape - Determine the number of bytes within the resulting string which this UCN will occupy. More...
static void	EncodeUCNEscape (const char *ThisTokBegin, const char *&ThisTokBuf, const char *ThisTokEnd, char *&ResultBuf, bool &HadError, FullSourceLoc Loc, unsigned CharByteWidth, DiagnosticsEngine *Diags, const LangOptions &Features)
	EncodeUCNEscape - Read the Universal Character Name, check constraints and convert the UTF32 to UTF8 or UTF16. More...
static bool	alwaysFitsInto64Bits (unsigned Radix, unsigned NumDigits)
static bool	IsExponentPart (char c)
static const char *	resyncUTF8 (const char *Err, const char *End)

Function Documentation

alwaysFitsInto64Bits()

static bool alwaysFitsInto64Bits ( unsigned  Radix, unsigned  NumDigits  )

static

Definition at line 1190 of file LiteralSupport.cpp.

Referenced by clang::NumericLiteralParser::GetFixedPointValue(), and clang::NumericLiteralParser::GetIntegerValue().

appendCodePoint()

static void appendCodePoint ( unsigned  Codepoint, llvm::SmallVectorImpl< char > &  Str  )

static

Definition at line 319 of file LiteralSupport.cpp.

Referenced by clang::expandUCNs().

Diag()

static DiagnosticBuilder Diag ( DiagnosticsEngine *  Diags, const LangOptions &  Features, FullSourceLoc  TokLoc, const char *  TokBegin, const char *  TokRangeBegin, const char *  TokRangeEnd, unsigned  DiagID  )

static

Produce a diagnostic highlighting some portion of a literal.

Emits the diagnostic DiagID, highlighting the range of characters from TokRangeBegin (inclusive) to TokRangeEnd (exclusive), which must be a substring of a spelling buffer for the token beginning at TokBegin.

Definition at line 78 of file LiteralSupport.cpp.

References clang::Lexer::AdvanceToTokenCharacter(), Begin, clang::FullSourceLoc::getManager(), MakeCharSourceRange(), and clang::DiagnosticsEngine::Report().

Referenced by clang::Sema::ActOnCapScopeReturnStmt(), clang::Sema::ActOnCaseStmt(), clang::Sema::ActOnCompoundStmt(), clang::Sema::ActOnCXXForRangeDecl(), clang::Sema::ActOnCXXTryBlock(), clang::Sema::ActOnCXXTypeid(), clang::Sema::ActOnDefaultStmt(), clang::Sema::ActOnDependentMemberExpr(), clang::Sema::ActOnFinishFunctionBody(), clang::Sema::ActOnFinishSwitchStmt(), clang::Sema::ActOnForEachDeclStmt(), clang::Sema::ActOnForStmt(), clang::Sema::ActOnGCCAsmStmt(), clang::Sema::ActOnLabelStmt(), clang::Sema::ActOnModuleDecl(), clang::Sema::ActOnModuleImport(), clang::Sema::ActOnMSAsmStmt(), clang::Sema::ActOnMSVCUnknownTypeName(), clang::Sema::ActOnObjCAtSynchronizedOperand(), clang::Sema::ActOnObjCAtThrowStmt(), clang::Sema::ActOnObjCAtTryStmt(), clang::Sema::ActOnObjCForCollectionStmt(), clang::Sema::ActOnPrivateModuleFragmentDecl(), clang::Sema::ActOnSEHExceptBlock(), clang::Sema::ActOnSEHLeaveStmt(), clang::Sema::ActOnSEHTryBlock(), clang::Sema::ActOnStartOfFunctionDef(), clang::Sema::ActOnStartOfSwitchStmt(), clang::Sema::ActOnStringLiteral(), clang::Sema::ActOnTagTemplateIdType(), clang::Sema::ActOnTemplateParameterList(), clang::Sema::ActOnUninitializedDecl(), clang::Sema::AddAlignedAttr(), clang::Sema::AddAlignValueAttr(), clang::Sema::AddAllocAlignAttr(), clang::Sema::AddAnnotationAttr(), clang::Sema::AddAssumeAlignedAttr(), addConstraintSatisfaction(), clang::Sema::AddInitializerToDecl(), clang::Sema::addLambdaParameters(), clang::interp::State::addNotes(), clang::Sema::AddParameterABIAttr(), applyEditsToTemp(), clang::Sema::AttachTypeConstraint(), clang::Sema::BuildAtomicExpr(), clang::Sema::BuildCXXThrow(), clang::Sema::BuildCXXTypeId(), clang::Sema::BuildCXXUuidof(), clang::Sema::BuildDeclaratorGroup(), clang::Sema::BuildLambdaExpr(), clang::Sema::buildLambdaInitCaptureInitialization(), clang::Sema::BuildObjCArrayLiteral(), clang::Sema::BuildObjCAtThrowStmt(), clang::Sema::BuildObjCBoxedExpr(), clang::Sema::BuildObjCDictionaryLiteral(), clang::Sema::BuildQualifiedTemplateIdExpr(), clang::Sema::BuildReturnStmt(), clang::Sema::BuildTypeConstraint(), clang::Sema::BuildUnresolvedCoawaitExpr(), clang::interp::State::CCEDiag(), clang::Sema::CheckAlignasUnderalignment(), clang::Sema::CheckAttrTarget(), clang::Sema::CheckCallingConvAttr(), clang::Sema::CheckCastAlign(), clang::Sema::CheckCompletedCoroutineBody(), clang::Sema::CheckCompleteVariableDeclaration(), clang::Sema::CheckConstraintExpression(), clang::Sema::CheckCXXThrowOperand(), clang::Sema::CheckDeductionGuideTemplate(), clang::Sema::CheckDependentFunctionTemplateSpecialization(), clang::Sema::CheckEnumConstant(), clang::Sema::CheckEnumRedeclaration(), clang::Sema::CheckEnumUnderlyingType(), clang::Sema::checkFinalSuspendNoThrow(), clang::Sema::CheckFloatComparison(), clang::Sema::CheckForFunctionRedefinition(), checkIntToPointerCast(), clang::Sema::CheckMain(), clang::Sema::CheckMemberSpecialization(), clang::Sema::checkMSInheritanceAttrOnDefinition(), clang::Sema::CheckNontrivialField(), clang::Sema::CheckNonTypeTemplateParameterType(), clang::Sema::checkNSReturnsRetainedReturnType(), clang::Sema::CheckObjCForCollectionOperand(), clang::Sema::CheckParmsForFunctionDef(), clang::Sema::CheckPointerConversion(), clang::Sema::checkPseudoObjectIncDec(), clang::Sema::CheckRedeclarationModuleOwnership(), clang::Sema::CheckRegparmAttr(), clang::Sema::checkSectionName(), clang::Sema::CheckShadowingDeclModification(), clang::Sema::CheckSpecializationInstantiationRedecl(), clang::Sema::checkStringLiteralArgumentAttr(), clang::Sema::CheckSubscriptingKind(), clang::Sema::checkTargetAttr(), clang::Sema::CheckTemplateArgument(), clang::Sema::CheckTemplateArgumentList(), clang::Sema::CheckTemplateParameterList(), clang::Sema::checkUnsafeExprAssigns(), clang::Sema::checkVarDeclRedefinition(), clang::Sema::CheckVariableDeclarationType(), clang::Sema::checkVariadicArgument(), clang::Sema::CheckVarTemplateId(), clang::computeDependence(), createResult(), createRule(), clang::Sema::deduceClosureReturnType(), clang::Sema::DeduceFunctionTypeFromReturnExpr(), clang::Sema::DefaultLvalueConversion(), clang::DeductionFailureInfo::Destroy(), clang::Sema::DiagnoseAlwaysNonNullPointer(), clang::Sema::DiagnoseAssignmentEnum(), clang::Sema::DiagnoseDependentMemberLookup(), clang::Sema::DiagnoseEmptyStmtBody(), clang::Sema::DiagnoseFunctionSpecifiers(), clang::Sema::DiagnoseMisalignedMembers(), clang::Sema::DiagnoseSelfMove(), clang::Sema::DiagnoseSentinelCalls(), clang::Sema::DiagnoseShadowingLambdaDecls(), clang::Sema::DiagnoseTemplateParameterShadow(), clang::Sema::DiagnoseUninstantiableTemplate(), clang::Sema::DiagnoseUnusedButSetDecl(), clang::Sema::DiagnoseUnusedDecl(), clang::Sema::DiagnoseUnusedLambdaCapture(), clang::Sema::DiagnoseUnusedParameters(), clang::Sema::DiagnoseUseOfDecl(), clang::DiagnosticRenderer::emitStoredDiagnostic(), clang::Sema::EnsureTemplateArgumentListConstraints(), clang::Expr::EvaluateKnownConstInt(), clang::Expr::EvaluateKnownConstIntCheckOverflow(), clang::interp::State::FFDiag(), clang::Sema::FinalizeDeclaration(), clang::TextDiagnosticBuffer::FlushDiagnostics(), clang::arcmt::FileRemapper::flushToDisk(), clang::arcmt::FileRemapper::flushToFile(), clang::Diagnostic::FormatDiagnostic(), clang::SrcMgr::ContentCache::getBufferOrNone(), clang::Sema::getDarwinSDKInfoForAvailabilityChecking(), clang::Sema::getDestructorTypeForDecltype(), clang::DiagnosticIDs::getDiagnosticFlags(), clang::SourceManager::getLineNumber(), clang::SourceManager::getPresumedLoc(), clang::Sema::inferObjCARCLifetime(), clang::arcmt::FileRemapper::initFromDisk(), clang::arcmt::FileRemapper::initFromFile(), clang::Sema::isIncompatibleTypedef(), clang::Sema::isMemberAccessibleForDeletion(), clang::Sema::IsOverload(), clang::MakeDeductionFailureInfo(), clang::Sema::MatchTemplateParametersToScopeSpecifier(), clang::Sema::MaybeEmitAmbiguousAtomicConstraintsDiagnostic(), clang::Sema::MaybeSuggestAddingStaticToDecl(), clang::Sema::mergeAlwaysInlineAttr(), clang::Sema::mergeAvailabilityAttr(), clang::Sema::mergeDeclAttributes(), clang::Sema::mergeDLLExportAttr(), clang::Sema::mergeDLLImportAttr(), clang::Sema::mergeErrorAttr(), clang::Sema::mergeHLSLNumThreadsAttr(), clang::Sema::mergeHLSLShaderAttr(), clang::Sema::mergeImportModuleAttr(), clang::Sema::mergeImportNameAttr(), clang::Sema::mergeInternalLinkageAttr(), clang::Sema::mergeMinSizeAttr(), clang::Sema::mergeMSInheritanceAttr(), clang::Sema::mergeOptimizeNoneAttr(), clang::Sema::mergeUuidAttr(), clang::Sema::MergeVarDecl(), clang::Sema::NoteDeletedFunction(), clang::Sema::notePreviousDefinition(), clang::arcmt::FileRemapper::overwriteOriginal(), clang::Parser::parseMapperModifier(), clang::Parser::parseMapTypeModifiers(), clang::Parser::ParseOpenMPVarList(), clang::Sema::ProcessAccessDeclAttributeList(), ProcessCharEscape(), ProcessUCNEscape(), clang::ASTReader::ReadPragmaDiagnosticMappings(), rejectConstNotMutableType(), reportDiag(), clang::Sema::RequireStructuralType(), clang::runWithSufficientStackSpace(), clang::runWithSufficientStackSpaceSlow(), clang::Sema::SemaBuiltinShuffleVector(), clang::Sema::SemaConvertVectorExpr(), clang::DiagnosticsEngine::setDiagnosticGroupErrorAsFatal(), clang::DiagnosticsEngine::setDiagnosticGroupWarningAsError(), clang::Sema::SetMemberAccessSpecifier(), clang::DiagnosticsEngine::setSeverity(), clang::DiagnosticsEngine::setSeverityForAll(), clang::DiagnosticsEngine::setSeverityForGroup(), clang::Sema::setTagNameForLinkagePurposes(), clang::Sema::TemplateParameterListsAreEqual(), clang::SourceManager::translateLineCol(), TryReinterpretCast(), clang::Sema::tryToFixVariablyModifiedVarType(), clang::Sema::VerifyBitField(), and clang::ento::PathDiagnosticConsumer::~PathDiagnosticConsumer().

EncodeUCNEscape()

static void EncodeUCNEscape ( const char *  ThisTokBegin, const char *&  ThisTokBuf, const char *  ThisTokEnd, char *&  ResultBuf, bool &  HadError, FullSourceLoc  Loc, unsigned  CharByteWidth, DiagnosticsEngine *  Diags, const LangOptions &  Features  )

static

EncodeUCNEscape - Read the Universal Character Name, check constraints and convert the UTF32 to UTF8 or UTF16.

This is a subroutine of StringLiteralParser. When we decide to implement UCN's for identifiers, we will likely rework our support for UCN's.

Definition at line 540 of file LiteralSupport.cpp.

References ProcessUCNEscape().

getCharWidth()

static unsigned getCharWidth ( tok::TokenKind  kind, const TargetInfo &  Target  )

static

Definition at line 39 of file LiteralSupport.cpp.

References clang::Target.

Referenced by clang::CharLiteralParser::CharLiteralParser(), and clang::targets::X86TargetInfo::X86TargetInfo().

IsExponentPart()

static bool IsExponentPart ( char  c )

inlinestatic

Definition at line 1287 of file LiteralSupport.cpp.

References c.

Referenced by clang::NumericLiteralParser::GetFixedPointValue().

MakeCharSourceRange()

static CharSourceRange MakeCharSourceRange ( const LangOptions &  Features, FullSourceLoc  TokLoc, const char *  TokBegin, const char *  TokRangeBegin, const char *  TokRangeEnd  )

static

Definition at line 59 of file LiteralSupport.cpp.

References clang::Lexer::AdvanceToTokenCharacter(), Begin, End, clang::CharSourceRange::getCharRange(), and clang::FullSourceLoc::getManager().

Referenced by Diag().

MeasureUCNEscape()

static int MeasureUCNEscape ( const char *  ThisTokBegin, const char *&  ThisTokBuf, const char *  ThisTokEnd, unsigned  CharByteWidth, const LangOptions &  Features, bool &  HadError  )

static

MeasureUCNEscape - Determine the number of bytes within the resulting string which this UCN will occupy.

Definition at line 505 of file LiteralSupport.cpp.

References ProcessUCNEscape().

Referenced by clang::StringLiteralParser::getOffsetOfStringByte().

ProcessCharEscape()

static unsigned ProcessCharEscape ( const char *  ThisTokBegin, const char *&  ThisTokBuf, const char *  ThisTokEnd, bool &  HadError, FullSourceLoc  Loc, unsigned  CharWidth, DiagnosticsEngine *  Diags, const LangOptions &  Features  )

static

ProcessCharEscape - Parse a standard C escape sequence, which can occur in either a character or a string literal.

Definition at line 91 of file LiteralSupport.cpp.

References Diag(), clang::isHexDigit(), clang::isPrintable(), and string().

Referenced by clang::CharLiteralParser::CharLiteralParser(), and clang::StringLiteralParser::getOffsetOfStringByte().

ProcessUCNEscape()

static bool ProcessUCNEscape ( const char *  ThisTokBegin, const char *&  ThisTokBuf, const char *  ThisTokEnd, uint32_t &  UcnVal, unsigned short &  UcnLen, FullSourceLoc  Loc, DiagnosticsEngine *  Diags, const LangOptions &  Features, bool  in_char_string_literal = false  )

static

ProcessUCNEscape - Read the Universal Character Name, check constraints and return the UTF32.

Definition at line 375 of file LiteralSupport.cpp.

References Diag(), and clang::isHexDigit().

Referenced by clang::CharLiteralParser::CharLiteralParser(), EncodeUCNEscape(), and MeasureUCNEscape().

resyncUTF8()

static const char* resyncUTF8 ( const char *  Err, const char *  End  )

static

Definition at line 1995 of file LiteralSupport.cpp.

References End.