1 //===--- PreprocessorLexer.cpp - C Language Family Lexer ------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the PreprocessorLexer and Token interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Lex/PreprocessorLexer.h"
15 #include "clang/Basic/SourceManager.h"
16 #include "clang/Lex/LexDiagnostic.h"
17 #include "clang/Lex/Preprocessor.h"
18 using namespace clang;
19
anchor()20 void PreprocessorLexer::anchor() { }
21
PreprocessorLexer(Preprocessor * pp,FileID fid)22 PreprocessorLexer::PreprocessorLexer(Preprocessor *pp, FileID fid)
23 : PP(pp), FID(fid), InitialNumSLocEntries(0),
24 ParsingPreprocessorDirective(false),
25 ParsingFilename(false), LexingRawMode(false) {
26 if (pp)
27 InitialNumSLocEntries = pp->getSourceManager().local_sloc_entry_size();
28 }
29
30 /// \brief After the preprocessor has parsed a \#include, lex and
31 /// (potentially) macro expand the filename.
LexIncludeFilename(Token & FilenameTok)32 void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
33 assert(ParsingPreprocessorDirective &&
34 ParsingFilename == false &&
35 "Must be in a preprocessing directive!");
36
37 // We are now parsing a filename!
38 ParsingFilename = true;
39
40 // Lex the filename.
41 if (LexingRawMode)
42 IndirectLex(FilenameTok);
43 else
44 PP->Lex(FilenameTok);
45
46 // We should have obtained the filename now.
47 ParsingFilename = false;
48
49 // No filename?
50 if (FilenameTok.is(tok::eod))
51 PP->Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
52 }
53
54 /// getFileEntry - Return the FileEntry corresponding to this FileID. Like
55 /// getFileID(), this only works for lexers with attached preprocessors.
getFileEntry() const56 const FileEntry *PreprocessorLexer::getFileEntry() const {
57 return PP->getSourceManager().getFileEntryForID(getFileID());
58 }
59