clang  14.0.0git
Functions
Lexer.cpp File Reference
#include "clang/Lex/Lexer.h"
#include "UnicodeCharSets.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TokenKinds.h"
#include "clang/Lex/LexDiagnostic.h"
#include "clang/Lex/LiteralSupport.h"
#include "clang/Lex/MultipleIncludeOpt.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "clang/Lex/Token.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBufferRef.h"
#include "llvm/Support/NativeFormatting.h"
#include "llvm/Support/UnicodeCharRanges.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <string>
#include <tuple>
#include <utility>
Include dependency graph for Lexer.cpp:

Go to the source code of this file.

Functions

template<typename T >
static void StringifyImpl (T &Str, char Quote)
 
static size_t getSpellingSlow (const Token &Tok, const char *BufPtr, const LangOptions &LangOpts, char *Spelling)
 Slow case of getSpelling. More...
 
static const char * findBeginningOfLine (StringRef Buffer, unsigned Offset)
 Returns the pointer that points to the beginning of line that contains the given offset, or null if the offset if invalid. More...
 
static SourceLocation getBeginningOfFileToken (SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts)
 
static CharSourceRange makeRangeFromFileLocs (CharSourceRange Range, const SourceManager &SM, const LangOptions &LangOpts)
 
static bool isInExpansionTokenRange (const SourceLocation Loc, const SourceManager &SM)
 
static LLVM_ATTRIBUTE_NOINLINE SourceLocation GetMappedTokenLoc (Preprocessor &PP, SourceLocation FileLoc, unsigned CharNo, unsigned TokLen)
 GetMappedTokenLoc - If lexing out of a 'mapped buffer', where we pretend the lexer buffer was all expanded at a single point, perform the mapping. More...
 
static char GetTrigraphCharForLetter (char Letter)
 GetTrigraphCharForLetter - Given a character that occurs after a ?? pair, return the decoded trigraph letter it corresponds to, or '\0' if nothing. More...
 
static char DecodeTrigraphChar (const char *CP, Lexer *L)
 DecodeTrigraphChar - If the specified character is a legal trigraph when prefixed with ??, emit a trigraph warning. More...
 
static bool isUnicodeWhitespace (uint32_t Codepoint)
 
static bool isAllowedIDChar (uint32_t C, const LangOptions &LangOpts)
 
static bool isAllowedInitiallyIDChar (uint32_t C, const LangOptions &LangOpts)
 
static CharSourceRange makeCharRange (Lexer &L, const char *Begin, const char *End)
 
static void maybeDiagnoseIDCharCompat (DiagnosticsEngine &Diags, uint32_t C, CharSourceRange Range, bool IsFirst)
 
static void maybeDiagnoseUTF8Homoglyph (DiagnosticsEngine &Diags, uint32_t C, CharSourceRange Range)
 After encountering UTF-8 character C and interpreting it as an identifier character, check whether it's a homoglyph for a common non-identifier source character that is unlikely to be an intentional identifier character and warn if so. More...
 
static void diagnoseInvalidUnicodeCodepointInIdentifier (DiagnosticsEngine &Diags, const LangOptions &LangOpts, uint32_t CodePoint, CharSourceRange Range, bool IsFirst)
 
static bool isEndOfBlockCommentWithEscapedNewLine (const char *CurPtr, Lexer *L)
 isBlockCommentEndOfEscapedNewLine - Return true if the specified newline character (either \n or \r) is part of an escaped newline sequence. More...
 
static const char * FindConflictEnd (const char *CurPtr, const char *BufferEnd, ConflictMarkerKind CMK)
 Find the end of a version control conflict marker. More...
 
static const char * findPlaceholderEnd (const char *CurPtr, const char *BufferEnd)
 

Function Documentation

◆ DecodeTrigraphChar()

static char DecodeTrigraphChar ( const char *  CP,
Lexer L 
)
static

DecodeTrigraphChar - If the specified character is a legal trigraph when prefixed with ??, emit a trigraph warning.

If trigraphs are enabled, return the result character. Finally, emit a warning about trigraph use whether trigraphs are enabled or not.

Definition at line 1192 of file Lexer.cpp.

References clang::Lexer::Diag(), clang::Lexer::getLangOpts(), GetTrigraphCharForLetter(), and clang::PreprocessorLexer::isLexingRawMode().

◆ diagnoseInvalidUnicodeCodepointInIdentifier()

static void diagnoseInvalidUnicodeCodepointInIdentifier ( DiagnosticsEngine Diags,
const LangOptions LangOpts,
uint32_t  CodePoint,
CharSourceRange  Range,
bool  IsFirst 
)
static

◆ findBeginningOfLine()

static const char* findBeginningOfLine ( StringRef  Buffer,
unsigned  Offset 
)
static

Returns the pointer that points to the beginning of line that contains the given offset, or null if the offset if invalid.

Definition at line 492 of file Lexer.cpp.

References clang::Lexer::isNewLineEscaped(), clang::isVerticalWhitespace(), and Offset.

Referenced by getBeginningOfFileToken(), and clang::Lexer::getIndentationForLine().

◆ FindConflictEnd()

static const char* FindConflictEnd ( const char *  CurPtr,
const char *  BufferEnd,
ConflictMarkerKind  CMK 
)
static

Find the end of a version control conflict marker.

Definition at line 2967 of file Lexer.cpp.

References clang::CMK_Perforce.

◆ findPlaceholderEnd()

static const char* findPlaceholderEnd ( const char *  CurPtr,
const char *  BufferEnd 
)
static

Definition at line 3071 of file Lexer.cpp.

◆ getBeginningOfFileToken()

static SourceLocation getBeginningOfFileToken ( SourceLocation  Loc,
const SourceManager SM,
const LangOptions LangOpts 
)
static

◆ GetMappedTokenLoc()

static SourceLocation GetMappedTokenLoc ( Preprocessor PP,
SourceLocation  FileLoc,
unsigned  CharNo,
unsigned  TokLen 
)
static

GetMappedTokenLoc - If lexing out of a 'mapped buffer', where we pretend the lexer buffer was all expanded at a single point, perform the mapping.

This is currently only used for _Pragma implementation, so it is the slow path of the hot getSourceLocation method. Do not allow it to be inlined.

Definition at line 1120 of file Lexer.cpp.

References clang::CharSourceRange::getBegin(), clang::CharSourceRange::getEnd(), clang::SourceLocation::getLocWithOffset(), clang::Preprocessor::getSourceManager(), clang::SourceLocation::isMacroID(), and SM.

Referenced by clang::Lexer::getSourceLocation().

◆ getSpellingSlow()

static size_t getSpellingSlow ( const Token Tok,
const char *  BufPtr,
const LangOptions LangOpts,
char *  Spelling 
)
static

Slow case of getSpelling.

Extract the characters comprising the spelling of this token from the provided input buffer.

Definition at line 273 of file Lexer.cpp.

References clang::Lexer::getCharAndSizeNoWarn(), clang::Token::getKind(), clang::Token::getLength(), clang::tok::isStringLiteral(), memcpy(), and clang::Token::needsCleaning().

Referenced by clang::Lexer::getSpelling().

◆ GetTrigraphCharForLetter()

static char GetTrigraphCharForLetter ( char  Letter)
static

GetTrigraphCharForLetter - Given a character that occurs after a ?? pair, return the decoded trigraph letter it corresponds to, or '\0' if nothing.

Definition at line 1173 of file Lexer.cpp.

Referenced by DecodeTrigraphChar().

◆ isAllowedIDChar()

static bool isAllowedIDChar ( uint32_t  C,
const LangOptions LangOpts 
)
static

◆ isAllowedInitiallyIDChar()

static bool isAllowedInitiallyIDChar ( uint32_t  C,
const LangOptions LangOpts 
)
static

◆ isEndOfBlockCommentWithEscapedNewLine()

static bool isEndOfBlockCommentWithEscapedNewLine ( const char *  CurPtr,
Lexer L 
)
static

isBlockCommentEndOfEscapedNewLine - Return true if the specified newline character (either \n or \r) is part of an escaped newline sequence.

Issue a diagnostic if so. We know that the newline is inside of a block comment.

Definition at line 2542 of file Lexer.cpp.

References clang::Lexer::Diag(), clang::Lexer::getLangOpts(), clang::isHorizontalWhitespace(), and clang::PreprocessorLexer::isLexingRawMode().

◆ isInExpansionTokenRange()

static bool isInExpansionTokenRange ( const SourceLocation  Loc,
const SourceManager SM 
)
static

Definition at line 881 of file Lexer.cpp.

References SM.

Referenced by clang::Lexer::makeFileCharRange().

◆ isUnicodeWhitespace()

static bool isUnicodeWhitespace ( uint32_t  Codepoint)
static

Definition at line 1449 of file Lexer.cpp.

References UnicodeWhitespaceCharRanges.

◆ makeCharRange()

static CharSourceRange makeCharRange ( Lexer L,
const char *  Begin,
const char *  End 
)
inlinestatic

◆ makeRangeFromFileLocs()

static CharSourceRange makeRangeFromFileLocs ( CharSourceRange  Range,
const SourceManager SM,
const LangOptions LangOpts 
)
static

◆ maybeDiagnoseIDCharCompat()

static void maybeDiagnoseIDCharCompat ( DiagnosticsEngine Diags,
uint32_t  C,
CharSourceRange  Range,
bool  IsFirst 
)
static

◆ maybeDiagnoseUTF8Homoglyph()

static void maybeDiagnoseUTF8Homoglyph ( DiagnosticsEngine Diags,
uint32_t  C,
CharSourceRange  Range 
)
static

After encountering UTF-8 character C and interpreting it as an identifier character, check whether it's a homoglyph for a common non-identifier source character that is unlikely to be an intentional identifier character and warn if so.

Definition at line 1536 of file Lexer.cpp.

References clang::operator<(), and clang::DiagnosticsEngine::Report().

◆ StringifyImpl()

template<typename T >
static void StringifyImpl ( T &  Str,
char  Quote 
)
static

Definition at line 233 of file Lexer.cpp.

Referenced by clang::Lexer::Stringify().