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Showing content from https://clang.llvm.org/doxygen/classclang_1_1Lexer.html below:

clang: clang::Lexer Class Reference

Lexer - This provides a simple interface that turns a text buffer into a stream of tokens. More...

#include "clang/Lex/Lexer.h"

struct SizedChar Represents a char and the number of bytes parsed to produce it. More...
Lexer (FileID FID, const llvm::MemoryBufferRef &InputFile, Preprocessor &PP, bool IsFirstIncludeOfFile=true) Lexer constructor - Create a new lexer object for the specified buffer with the specified preprocessor managing the lexing process.
Lexer (SourceLocation FileLoc, const LangOptions &LangOpts, const char *BufStart, const char *BufPtr, const char *BufEnd, bool IsFirstIncludeOfFile=true) Lexer constructor - Create a new raw lexer object.
Lexer (FileID FID, const llvm::MemoryBufferRef &FromFile, const SourceManager &SM, const LangOptions &LangOpts, bool IsFirstIncludeOfFile=true) Lexer constructor - Create a new raw lexer object.
Lexer (const Lexer &)=delete Lexer & operator= (const Lexer &)=delete SourceLocation getFileLoc () const getFileLoc - Return the File Location for the file we are lexing out of.
bool Lex (Token &Result) Lex - Return the next token in the file.
bool isPragmaLexer () const isPragmaLexer - Returns true if this Lexer is being used to lex a pragma.
bool LexFromRawLexer (Token &Result) LexFromRawLexer - Lex a token from a designated raw lexer (one with no associated preprocessor object.
bool isKeepWhitespaceMode () const isKeepWhitespaceMode - Return true if the lexer should return tokens for every character in the file, including whitespace and comments.
void SetKeepWhitespaceMode (bool Val) SetKeepWhitespaceMode - This method lets clients enable or disable whitespace retention mode.
bool inKeepCommentMode () const inKeepCommentMode - Return true if the lexer should return comments as tokens.
void SetCommentRetentionState (bool Mode) SetCommentRetentionMode - Change the comment retention mode of the lexer to the specified mode.
void resetExtendedTokenMode () Sets the extended token mode back to its initial value, according to the language options and preprocessor.
StringRef getBuffer () const Gets source code buffer.
void ReadToEndOfLine (SmallVectorImpl< char > *Result=nullptr) ReadToEndOfLine - Read the rest of the current preprocessor line as an uninterpreted string.
DiagnosticBuilder Diag (const char *Loc, unsigned DiagID) const Diag - Forwarding function for diagnostics.
SourceLocation getSourceLocation (const char *Loc, unsigned TokLen=1) const getSourceLocation - Return a source location identifier for the specified offset in the current file.
SourceLocation getSourceLocation () override getSourceLocation - Return a source location for the next character in the current file.
const char * getBufferLocation () const Return the current location in the buffer.
unsigned getCurrentBufferOffset () Returns the current lexing offset.
void seek (unsigned Offset, bool IsAtStartOfLine) Set the lexer's buffer pointer to Offset.
bool isFirstTimeLexingFile () const Check if this is the first time we're lexing the input file.
PreprocessorLexer (const PreprocessorLexer &)=delete PreprocessorLexer & operator= (const PreprocessorLexer &)=delete void LexIncludeFilename (Token &FilenameTok) Lex a token, producing a header-name token if possible.
void setParsingPreprocessorDirective (bool f) Inform the lexer whether or not we are currently lexing a preprocessor directive.
bool isLexingRawMode () const Return true if this lexer is in raw mode or not.
Preprocessor * getPP () const Return the preprocessor object for this lexer.
FileID getFileID () const unsigned getInitialNumSLocEntries () const Number of SLocEntries before lexing the file.
OptionalFileEntryRef getFileEntry () const getFileEntry - Return the FileEntry corresponding to this FileID.
conditional_iterator conditional_begin () const conditional_iterator conditional_end () const void setConditionalLevels (ArrayRef< PPConditionalInfo > CL) static Lexer * Create_PragmaLexer (SourceLocation SpellingLoc, SourceLocation ExpansionLocStart, SourceLocation ExpansionLocEnd, unsigned TokLen, Preprocessor &PP) Create_PragmaLexer: Lexer constructor - Create a new lexer object for _Pragma expansion.
static std::string Stringify (StringRef Str, bool Charify=false) Stringify - Convert the specified string into a C string by i) escaping '\' and " characters and ii) replacing newline character(s) with "\n".
static void Stringify (SmallVectorImpl< char > &Str) Stringify - Convert the specified string into a C string by i) escaping '\' and " characters and ii) replacing newline character(s) with "\n".
static unsigned getSpelling (const Token &Tok, const char *&Buffer, const SourceManager &SourceMgr, const LangOptions &LangOpts, bool *Invalid=nullptr) getSpelling - This method is used to get the spelling of a token into a preallocated buffer, instead of as an std::string.
static std::string getSpelling (const Token &Tok, const SourceManager &SourceMgr, const LangOptions &LangOpts, bool *Invalid=nullptr) getSpelling() - Return the 'spelling' of the Tok token.
static StringRef getSpelling (SourceLocation loc, SmallVectorImpl< char > &buffer, const SourceManager &SM, const LangOptions &options, bool *invalid=nullptr) getSpelling - This method is used to get the spelling of the token at the given source location.
static unsigned MeasureTokenLength (SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts) MeasureTokenLength - Relex the token at the specified location and return its length in bytes in the input file.
static bool getRawToken (SourceLocation Loc, Token &Result, const SourceManager &SM, const LangOptions &LangOpts, bool IgnoreWhiteSpace=false) Relex the token at the specified location.
static SourceLocation GetBeginningOfToken (SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts) Given a location any where in a source buffer, find the location that corresponds to the beginning of the token in which the original source location lands.
static unsigned getTokenPrefixLength (SourceLocation TokStart, unsigned CharNo, const SourceManager &SM, const LangOptions &LangOpts) Get the physical length (including trigraphs and escaped newlines) of the first Characters characters of the token starting at TokStart.
static SourceLocation AdvanceToTokenCharacter (SourceLocation TokStart, unsigned Characters, const SourceManager &SM, const LangOptions &LangOpts) AdvanceToTokenCharacter - If the current SourceLocation specifies a location at the start of a token, return a new location that specifies a character within the token.
static SourceLocation getLocForEndOfToken (SourceLocation Loc, unsigned Offset, const SourceManager &SM, const LangOptions &LangOpts) Computes the source location just past the end of the token at this source location.
static CharSourceRange getAsCharRange (SourceRange Range, const SourceManager &SM, const LangOptions &LangOpts) Given a token range, produce a corresponding CharSourceRange that is not a token range.
static CharSourceRange getAsCharRange (CharSourceRange Range, const SourceManager &SM, const LangOptions &LangOpts) static bool isAtStartOfMacroExpansion (SourceLocation loc, const SourceManager &SM, const LangOptions &LangOpts, SourceLocation *MacroBegin=nullptr) Returns true if the given MacroID location points at the first token of the macro expansion.
static bool isAtEndOfMacroExpansion (SourceLocation loc, const SourceManager &SM, const LangOptions &LangOpts, SourceLocation *MacroEnd=nullptr) Returns true if the given MacroID location points at the last token of the macro expansion.
static CharSourceRange makeFileCharRange (CharSourceRange Range, const SourceManager &SM, const LangOptions &LangOpts) Accepts a range and returns a character range with file locations.
static StringRef getSourceText (CharSourceRange Range, const SourceManager &SM, const LangOptions &LangOpts, bool *Invalid=nullptr) Returns a string for the source that the range encompasses.
static StringRef getImmediateMacroName (SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts) Retrieve the name of the immediate macro expansion.
static StringRef getImmediateMacroNameForDiagnostics (SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts) Retrieve the name of the immediate macro expansion.
static PreambleBounds ComputePreamble (StringRef Buffer, const LangOptions &LangOpts, unsigned MaxLines=0) Compute the preamble of the given file.
static std::optional< Token > findNextToken (SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts, bool IncludeComments=false) Finds the token that comes right after the given location.
static std::optional< Token > findPreviousToken (SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts, bool IncludeComments) Finds the token that comes before the given location.
static SourceLocation findLocationAfterToken (SourceLocation loc, tok::TokenKind TKind, const SourceManager &SM, const LangOptions &LangOpts, bool SkipTrailingWhitespaceAndNewLine) Checks that the given token is the first token that occurs after the given location (this excludes comments and whitespace).
static bool isAsciiIdentifierContinueChar (char c, const LangOptions &LangOpts) Returns true if the given character could appear in an identifier.
static bool isNewLineEscaped (const char *BufferStart, const char *Str) Checks whether new line pointed by Str is preceded by escape sequence.
static SizedChar getCharAndSizeNoWarn (const char *Ptr, const LangOptions &LangOpts) getCharAndSizeNoWarn - Like the getCharAndSize method, but does not ever emit a warning.
static StringRef getIndentationForLine (SourceLocation Loc, const SourceManager &SM) Returns the leading whitespace for line that corresponds to the given location Loc.

Lexer - This provides a simple interface that turns a text buffer into a stream of tokens.

This provides no support for file reading or buffering, or buffering/seeking of tokens, only forward lexing is supported. It relies on the specified Preprocessor object to handle preprocessor directives, etc.

Definition at line 78 of file Lexer.h.

◆ Lexer() [1/4]

Lexer constructor - Create a new lexer object for the specified buffer with the specified preprocessor managing the lexing process.

This lexer assumes that the associated file buffer and Preprocessor objects will outlive it, so it doesn't take ownership of either of them.

Definition at line 183 of file Lexer.cpp.

References resetExtendedTokenMode().

◆ Lexer() [2/4] Lexer::Lexer ( SourceLocation fileloc, const LangOptions & langOpts, const char * BufStart, const char * BufPtr, const char * BufEnd, bool IsFirstIncludeOfFile = true )

Lexer constructor - Create a new raw lexer object.

This object is only suitable for calls to 'LexFromRawLexer'. This lexer assumes that the text range will outlive it, so it doesn't take ownership of it.

Definition at line 198 of file Lexer.cpp.

References clang::PreprocessorLexer::LexingRawMode.

◆ Lexer() [3/4]

Lexer constructor - Create a new raw lexer object.

This object is only suitable for calls to 'LexFromRawLexer'. This lexer assumes that the text range will outlive it, so it doesn't take ownership of it.

Definition at line 212 of file Lexer.cpp.

◆ Lexer() [4/4] clang::Lexer::Lexer ( const Lexer & ) delete ◆ AdvanceToTokenCharacter() ◆ ComputePreamble()

Compute the preamble of the given file.

The preamble of a file contains the initial comments, include directives, and other preprocessor directives that occur before the code in this particular file actually begins. The preamble of the main source file is a potential prefix header.

Parameters: Buffer The memory buffer containing the file's contents. MaxLines If non-zero, restrict the length of the preamble to fewer than this number of lines.

Returns: The offset into the file where the preamble ends and the rest of the file begins along with a boolean value indicating whether the preamble ends at the beginning of a new line.

Definition at line 636 of file Lexer.cpp.

References clang::SourceLocation::getFromRawEncoding(), clang::Token::getKind(), clang::Token::getLocation(), clang::SourceLocation::getRawEncoding(), clang::Token::getRawIdentifier(), clang::Token::isAtStartOfLine(), clang::SourceLocation::isInvalid(), clang::SourceLocation::isValid(), LexFromRawLexer(), clang::Token::needsCleaning(), and SetCommentRetentionState().

Referenced by clang::ComputePreambleBounds(), and clang::PrintPreambleAction::ExecuteAction().

◆ Create_PragmaLexer()

Create_PragmaLexer: Lexer constructor - Create a new lexer object for _Pragma expansion.

This has a variety of magic semantics that this method sets up. It returns a new'd Lexer that must be delete'd when done.

On entrance to this routine, TokStartLoc is a macro location which has a spelling loc that indicates the bytes to be lexed for the token and an expansion location that indicates where all lexed tokens should be "expanded from".

TODO: It would really be nice to make _Pragma just be a wrapper around a normal lexer that remaps tokens as they fly by. This would require making Preprocessor::Lex virtual. Given that, we could just dump in a magic lexer interface that could handle this stuff. This would pull GetMappedTokenLoc out of the critical path of the lexer!

Definition at line 242 of file Lexer.cpp.

References clang::Preprocessor::getSourceManager(), clang::PreprocessorLexer::ParsingPreprocessorDirective, clang::PreprocessorLexer::PP, and SM.

◆ Diag() ◆ findLocationAfterToken() ◆ findNextToken()

Finds the token that comes right after the given location.

Returns the next token, or std::nullopt if the location is inside a macro.

Definition at line 1324 of file Lexer.cpp.

References clang::File, getLocForEndOfToken(), isAtEndOfMacroExpansion(), clang::SourceLocation::isMacroID(), LexFromRawLexer(), Loc, SetCommentRetentionState(), and SM.

Referenced by clang::tooling::ExtractionSemicolonPolicy::compute(), findLocationAfterToken(), and fixVarDeclWithArray().

◆ findPreviousToken() ◆ getAsCharRange() [1/2] ◆ getAsCharRange() [2/2] ◆ GetBeginningOfToken() ◆ getBuffer() StringRef clang::Lexer::getBuffer ( ) const inline

Gets source code buffer.

Definition at line 284 of file Lexer.h.

◆ getBufferLocation() const char * clang::Lexer::getBufferLocation ( ) const inline ◆ getCharAndSizeNoWarn() static SizedChar clang::Lexer::getCharAndSizeNoWarn ( const char * Ptr, const LangOptions & LangOpts ) inlinestatic ◆ getCurrentBufferOffset() unsigned clang::Lexer::getCurrentBufferOffset ( ) inline ◆ getFileLoc()

getFileLoc - Return the File Location for the file we are lexing out of.

The physical location encodes the location where the characters come from, the virtual location encodes where we should claim the characters came from. Currently this is only used by _Pragma handling.

Definition at line 199 of file Lexer.h.

◆ getImmediateMacroName()

Retrieve the name of the immediate macro expansion.

This routine starts from a source location, and finds the name of the macro responsible for its immediate expansion. It looks through any intervening macro argument expansions to compute this. It returns a StringRef which refers to the SourceManager-owned buffer of the source where that macro name is spelled. Thus, the result shouldn't out-live that SourceManager.

Definition at line 1059 of file Lexer.cpp.

References E, clang::PreprocessorLexer::FID, clang::SrcMgr::ExpansionInfo::getExpansionLocStart(), clang::SrcMgr::ExpansionInfo::getSpellingLoc(), clang::SourceLocation::isFileID(), clang::SrcMgr::ExpansionInfo::isMacroArgExpansion(), clang::SourceLocation::isMacroID(), Loc, MeasureTokenLength(), and SM.

Referenced by BuiltinOverflow(), CheckMemaccessSize(), clang::Preprocessor::getImmediateMacroName(), getMacroName(), clang::ento::CheckerContext::getMacroNameOrSpelling(), IsEnumConstOrFromMacro(), clang::data_collection::printMacroName(), and clang::Sema::ProcessAPINotes().

◆ getImmediateMacroNameForDiagnostics() ◆ getIndentationForLine() ◆ getLocForEndOfToken()

Computes the source location just past the end of the token at this source location.

This routine can be used to produce a source location that points just past the end of the token referenced by Loc, and is generally used when a diagnostic needs to point just after a token where it expected something different that it received. If the returned source location would not be meaningful (e.g., if it points into a macro), this routine returns an invalid source location.

Parameters: Offset an offset from the end of the token, where the source location should refer to. The default offset (0) produces a source location pointing just past the end of the token; an offset of 1 produces a source location pointing to the last character in the token, etc.

Definition at line 849 of file Lexer.cpp.

References clang::SourceLocation::getLocWithOffset(), isAtEndOfMacroExpansion(), clang::SourceLocation::isInvalid(), clang::SourceLocation::isMacroID(), Loc, MeasureTokenLength(), and SM.

Referenced by AnalyzeImplicitConversions(), convertTokenRangeToCharRange(), createAttributeInsertion(), findNextToken(), getAsCharRange(), getFunNameText(), clang::Preprocessor::getLocForEndOfToken(), clang::Sema::getLocForEndOfToken(), getPastLoc(), getPointeeTypeText(), getRange(), clang::diff::SyntaxTree::getSourceRangeOffsets(), getSourceRangeToTokenEnd(), getVarDeclIdentifierText(), makeRangeFromFileLocs(), clang::tooling::RecursiveSymbolVisitor< T >::VisitCXXConstructorDecl(), clang::tooling::RecursiveSymbolVisitor< T >::VisitTypedefTypeLoc(), and clang::tooling::RecursiveSymbolVisitor< T >::VisitTypeLoc().

◆ getRawToken()

Relex the token at the specified location.

Returns: true if there was a failure, false on success.

Definition at line 509 of file Lexer.cpp.

References clang::Invalid, clang::isWhitespace(), LexFromRawLexer(), Loc, clang::Result, SetCommentRetentionState(), and SM.

Referenced by atOrBeforeSeparation(), findPreviousToken(), findPreviousTokenKind(), clang::Preprocessor::getRawToken(), clang::tooling::maybeExtendRange(), and MeasureTokenLength().

◆ getSourceLocation() [1/2] ◆ getSourceLocation() [2/2] ◆ getSourceText()

Returns a string for the source that the range encompasses.

Definition at line 1023 of file Lexer.cpp.

References clang::SourceRange::getBegin(), clang::SourceRange::getEnd(), clang::Invalid, clang::SourceRange::isInvalid(), makeFileCharRange(), Range, and SM.

Referenced by AnalyzeImplicitConversions(), constructDebugPieceForTrackedCondition(), clang::tooling::createRenameAtomicChanges(), DiagnoseBaseOrMemInitializerOrder(), diagnoseXorMisusedAsPow(), clang::diff::SyntaxTree::Impl::getDeclValue(), GetDefaultValueString(), getExprText(), getLiteralInfo(), clang::MacroExpansionContext::getOriginalText(), getRangeText(), clang::tooling::getText(), clang::tooling::fixit::internal::getText(), clang::ento::ConditionBRVisitor::patternMatch(), printExprAsWritten(), clang::tooling::replaceStmtWithStmt(), and clang::tooling::ReplaceNodeWithTemplate::run().

◆ getSpelling() [1/3]

getSpelling - This method is used to get the spelling of a token into a preallocated buffer, instead of as an std::string.

The caller is required to allocate enough space for the token, which is guaranteed to be at least Tok.getLength() bytes long. The length of the actual result is returned.

Note that this method may do two possible things: it may either fill in the buffer specified with characters, or it may change the input pointer to point to a constant buffer with the data already in it (avoiding a copy). The caller is not allowed to modify the returned buffer pointer if an internal buffer is returned.

The caller is required to allocate enough space for the token, which is guaranteed to be at least Tok.getLength() bytes long. The actual length of the token is returned.

Definition at line 451 of file Lexer.cpp.

References clang::SourceManager::getCharacterData(), clang::Token::getIdentifierInfo(), clang::Token::getLength(), clang::Token::getLiteralData(), clang::Token::getLocation(), clang::Token::getRawIdentifier(), getSpellingSlow(), clang::Token::hasUCN(), clang::Invalid, clang::Token::is(), clang::Token::isLiteral(), and clang::Token::needsCleaning().

Referenced by findDirectives(), clang::ento::CheckerContext::getMacroNameOrSpelling(), clang::StringLiteralParser::getOffsetOfStringByte(), clang::Preprocessor::getSpelling(), highlightLines(), clang::ast_matchers::internal::isTokenAtLoc(), and ReadOriginalFileName().

◆ getSpelling() [2/3]

getSpelling() - Return the 'spelling' of the Tok token.

getSpelling() - Return the 'spelling' of this token.

The spelling of a token is the characters used to represent the token in the source file after trigraph expansion and escaped-newline folding. In particular, this wants to get the true, uncanonicalized, spelling of things like digraphs UCNs, etc.

The spelling of a token are the characters used to represent the token in the source file after trigraph expansion and escaped-newline folding. In particular, this wants to get the true, uncanonicalized, spelling of things like digraphs UCNs, etc.

Definition at line 419 of file Lexer.cpp.

References clang::SourceManager::getCharacterData(), clang::Token::getLength(), clang::Token::getLocation(), getSpellingSlow(), clang::Invalid, clang::Token::needsCleaning(), and clang::Result.

◆ getSpelling() [3/3]

getSpelling - This method is used to get the spelling of the token at the given source location.

getSpelling() - Return the 'spelling' of this token.

If, as is usually true, it is not necessary to copy any data, then the returned string may not point into the provided buffer.

This method lexes at the expansion depth of the given location and does not jump to the expansion or spelling location.

Definition at line 378 of file Lexer.cpp.

References clang::Token::getLength(), getSpellingSlow(), length(), LexFromRawLexer(), clang::Token::needsCleaning(), and SM.

◆ getTokenPrefixLength() ◆ inKeepCommentMode() bool clang::Lexer::inKeepCommentMode ( ) const inline

inKeepCommentMode - Return true if the lexer should return comments as tokens.

Definition at line 262 of file Lexer.h.

◆ isAsciiIdentifierContinueChar() bool Lexer::isAsciiIdentifierContinueChar ( char c, const LangOptions & LangOpts ) static ◆ isAtEndOfMacroExpansion()

Returns true if the given MacroID location points at the last token of the macro expansion.

Parameters: MacroEnd If non-null and function returns true, it is set to end location of the macro.

Definition at line 893 of file Lexer.cpp.

References clang::SourceLocation::getLocWithOffset(), isAtEndOfMacroExpansion(), clang::SourceLocation::isFileID(), clang::SourceLocation::isMacroID(), clang::SourceLocation::isValid(), MeasureTokenLength(), and SM.

Referenced by FindLocsWithCommonFileID(), findNextToken(), getLocForEndOfToken(), getVarDeclIdentifierText(), isAtEndOfMacroExpansion(), clang::Preprocessor::isAtEndOfMacroExpansion(), makeFileCharRange(), and clang::ento::ConditionBRVisitor::patternMatch().

◆ isAtStartOfMacroExpansion() ◆ isFirstTimeLexingFile() bool clang::Lexer::isFirstTimeLexingFile ( ) const inline

Check if this is the first time we're lexing the input file.

Definition at line 610 of file Lexer.h.

◆ isKeepWhitespaceMode() bool clang::Lexer::isKeepWhitespaceMode ( ) const inline

isKeepWhitespaceMode - Return true if the lexer should return tokens for every character in the file, including whitespace and comments.

This should only be used in raw mode, as the preprocessor is not prepared to deal with the excess tokens.

Definition at line 248 of file Lexer.h.

Referenced by SetCommentRetentionState().

◆ isNewLineEscaped() bool Lexer::isNewLineEscaped ( const char * BufferStart, const char * Str ) static ◆ isPragmaLexer() bool clang::Lexer::isPragmaLexer ( ) const inline

isPragmaLexer - Returns true if this Lexer is being used to lex a pragma.

Definition at line 225 of file Lexer.h.

◆ Lex() ◆ LexFromRawLexer() bool clang::Lexer::LexFromRawLexer ( Token & Result ) inline

LexFromRawLexer - Lex a token from a designated raw lexer (one with no associated preprocessor object.

Return true if the 'next character to read' pointer points at the end of the lexer buffer, false otherwise.

Definition at line 236 of file Lexer.h.

References Lex(), clang::PreprocessorLexer::LexingRawMode, and clang::Result.

Referenced by ComputePreamble(), EmitAlphaCounter(), clang::DumpRawTokensAction::ExecuteAction(), findDirectives(), findNextToken(), getBeginningOfFileToken(), getEntityEndLoc(), clang::StringLiteral::getLocationOfByte(), getRawToken(), getSpelling(), LexRawTokensFromMainFile(), LocPropertyAttribute(), NormalizeLine(), clang::format::IntegerLiteralSeparatorFixer::process(), clang::syntax::tokenize(), and clang::TokenRewriter::TokenRewriter().

◆ makeFileCharRange()

Accepts a range and returns a character range with file locations.

Returns a null range if a part of the range resides inside a macro expansion or the range does not reside on the same FileID.

This function is trying to deal with macros and return a range based on file locations. The cases where it can successfully handle macros are:

-begin or end range lies at the start or end of a macro expansion, in which case the location will be set to the expansion point, e.g: #define M 1 2 a M If you have a range [a, 2] (where 2 came from the macro), the function will return a range for "a M" if you have range [a, 1], the function will fail because the range overlaps with only a part of the macro

-The macro is a function macro and the range can be mapped to the macro arguments, e.g: #define M 1 2 #define FM(x) x FM(a b M) if you have range [b, 2], the function will return the file range "b M" inside the macro arguments. if you have range [a, 2], the function will return the file range "FM(a b M)" since the range includes all of the macro expansion.

Definition at line 954 of file Lexer.cpp.

References Begin, clang::SourceRange::getBegin(), clang::SourceRange::getEnd(), clang::SrcMgr::SLocEntry::getExpansion(), clang::SrcMgr::ExpansionInfo::getExpansionLocStart(), clang::Invalid, isAtEndOfMacroExpansion(), isAtStartOfMacroExpansion(), clang::SourceLocation::isFileID(), isInExpansionTokenRange(), clang::SourceLocation::isInvalid(), clang::SrcMgr::ExpansionInfo::isMacroArgExpansion(), clang::SourceLocation::isMacroID(), makeFileCharRange(), makeRangeFromFileLocs(), Range, clang::SourceRange::setBegin(), clang::SourceRange::setEnd(), and SM.

Referenced by clang::transformer::after(), clang::tooling::getAssociatedRange(), getRange(), getSourceText(), makeFileCharRange(), and makeStandaloneRange().

◆ MeasureTokenLength()

MeasureTokenLength - Relex the token at the specified location and return its length in bytes in the input file.

If the token needs cleaning (e.g. includes a trigraph or an escaped newline) then this count includes bytes that are part of that.

Definition at line 498 of file Lexer.cpp.

References clang::Token::getLength(), getRawToken(), Loc, and SM.

Referenced by clang::TextDiagnostic::emitDiagnosticLoc(), getEndCharLoc(), getImmediateMacroName(), getImmediateMacroNameForDiagnostics(), getLocForEndOfToken(), clang::Rewriter::getRangeSize(), getRangeSize(), clang::Rewriter::getRewrittenText(), clang::html::HighlightRange(), isAtEndOfMacroExpansion(), prepareAndFilterRanges(), and clang::PrintingCodeCompleteConsumer::ProcessCodeCompleteResults().

◆ operator=() ◆ ReadToEndOfLine() ◆ resetExtendedTokenMode() void Lexer::resetExtendedTokenMode ( ) ◆ seek()

Set the lexer's buffer pointer to Offset.

Definition at line 277 of file Lexer.cpp.

◆ SetCommentRetentionState() void clang::Lexer::SetCommentRetentionState ( bool Mode ) inline ◆ SetKeepWhitespaceMode() void clang::Lexer::SetKeepWhitespaceMode ( bool Val ) inline ◆ Stringify() [1/2]

Stringify - Convert the specified string into a C string by i) escaping '\' and " characters and ii) replacing newline character(s) with "\n".

Definition at line 316 of file Lexer.cpp.

References StringifyImpl().

◆ Stringify() [2/2] std::string Lexer::Stringify ( StringRef Str, bool Charify = false ) static ◆ Preprocessor

The documentation for this class was generated from the following files:

include/clang/Lex/Lexer.h
lib/Lex/Lexer.cpp

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