clang 10.0.0git

PreprocessorLexer.cpp
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1 //===- PreprocessorLexer.cpp - C Language Family Lexer --------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the PreprocessorLexer and Token interfaces.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "clang/Lex/PreprocessorLexer.h"
14 #include "clang/Basic/SourceManager.h"
15 #include "clang/Lex/LexDiagnostic.h"
16 #include "clang/Lex/Preprocessor.h"
17 #include "clang/Lex/Token.h"
18 #include <cassert>
19
20 using namespace clang;
21
22 void PreprocessorLexer::anchor() {}
23
24 PreprocessorLexer::PreprocessorLexer(Preprocessor *pp, FileID fid)
25 : PP(pp), FID(fid) {
26 if (pp)
27 InitialNumSLocEntries = pp->getSourceManager().local_sloc_entry_size();
28 }
29
30 /// After the preprocessor has parsed a \#include, lex and
31 /// (potentially) macro expand the filename.
32 void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
33 assert(ParsingFilename == false && "reentered LexIncludeFilename");
34
35 // We are now parsing a filename!
36 ParsingFilename = true;
37
38 // Lex the filename.
39 if (LexingRawMode)
40 IndirectLex(FilenameTok);
41 else
42 PP->Lex(FilenameTok);
43
44 // We should have obtained the filename now.
45 ParsingFilename = false;
46 }
47
48 /// getFileEntry - Return the FileEntry corresponding to this FileID. Like
49 /// getFileID(), this only works for lexers with attached preprocessors.
50 const FileEntry *PreprocessorLexer::getFileEntry() const {
51 return PP->getSourceManager().getFileEntryForID(getFileID());
52 }
clang::PreprocessorLexer::InitialNumSLocEntries
unsigned InitialNumSLocEntries
Number of SLocEntries before lexing the file.
Definition: PreprocessorLexer.h:42
SourceManager.h
Defines the SourceManager interface.
clang::Token
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
clang::PreprocessorLexer::FID
const FileID FID
The SourceManager FileID corresponding to the file being lexed.
Definition: PreprocessorLexer.h:39
clang::SourceManager::local_sloc_entry_size
unsigned local_sloc_entry_size() const
Get the number of local SLocEntries we have.
Definition: SourceManager.h:1678
clang::PreprocessorLexer::ParsingFilename
bool ParsingFilename
True after #include; turns <xx> or "xxx" into a tok::header_name token.
Definition: PreprocessorLexer.h:52
clang::PreprocessorLexer::LexingRawMode
bool LexingRawMode
True if in raw mode.
Definition: PreprocessorLexer.h:67
clang::SourceManager::getFileEntryForID
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
Definition: SourceManager.h:1015
Preprocessor.h
Defines the clang::Preprocessor interface.
clang::PreprocessorLexer::getFileID
FileID getFileID() const
Definition: PreprocessorLexer.h:146
clang::PreprocessorLexer::PreprocessorLexer
PreprocessorLexer()
Definition: PreprocessorLexer.h:77
LexDiagnostic.h
clang::Preprocessor::getSourceManager
SourceManager & getSourceManager() const
Definition: Preprocessor.h:911
clang::FileEntry
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:78
clang::Preprocessor::Lex
void Lex(Token &Result)
Lex the next token for this preprocessor.
Definition: Preprocessor.cpp:886
clang::FileID
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
Definition: SourceLocation.h:38
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:21
clang::PreprocessorLexer::getFileEntry
const FileEntry * getFileEntry() const
getFileEntry - Return the FileEntry corresponding to this FileID.
Definition: PreprocessorLexer.cpp:50
clang::PreprocessorLexer::PP
Preprocessor * PP
Definition: PreprocessorLexer.h:36
clang::PreprocessorLexer::IndirectLex
virtual void IndirectLex(Token &Result)=0
PreprocessorLexer.h
Defines the PreprocessorLexer interface.
clang::PreprocessorLexer::LexIncludeFilename
void LexIncludeFilename(Token &FilenameTok)
Lex a token, producing a header-name token if possible.
Definition: PreprocessorLexer.cpp:32
Token.h
clang::Preprocessor
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:128