PreprocessorLexer.cpp revision 226633 
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/Lex/Preprocessor.h"
16#include "clang/Lex/LexDiagnostic.h"
17#include "clang/Basic/SourceManager.h"
18using namespace clang;
19
20PreprocessorLexer::PreprocessorLexer(Preprocessor *pp, FileID fid)
21  : PP(pp), FID(fid), InitialNumSLocEntries(0),
22    ParsingPreprocessorDirective(false),
23    ParsingFilename(false), LexingRawMode(false) {
24  if (pp)
25    InitialNumSLocEntries = pp->getSourceManager().local_sloc_entry_size();
26}
27
28/// LexIncludeFilename - After the preprocessor has parsed a #include, lex and
29/// (potentially) macro expand the filename.
30void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
31  assert(ParsingPreprocessorDirective &&
32         ParsingFilename == false &&
33         "Must be in a preprocessing directive!");
34
35  // We are now parsing a filename!
36  ParsingFilename = true;
37
38  // Lex the filename.
39  IndirectLex(FilenameTok);
40
41  // We should have obtained the filename now.
42  ParsingFilename = false;
43
44  // No filename?
45  if (FilenameTok.is(tok::eod))
46    PP->Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
47}
48
49/// getFileEntry - Return the FileEntry corresponding to this FileID.  Like
50/// getFileID(), this only works for lexers with attached preprocessors.
51const FileEntry *PreprocessorLexer::getFileEntry() const {
52  return PP->getSourceManager().getFileEntryForID(getFileID());
53}
54