PreprocessorLexer.cpp revision 500d3297d2a21edeac4d46cbcbe21bc2352c2a28 
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
20/// LexIncludeFilename - After the preprocessor has parsed a #include, lex and
21/// (potentially) macro expand the filename.
22void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
23  assert(ParsingPreprocessorDirective &&
24         ParsingFilename == false &&
25         "Must be in a preprocessing directive!");
26
27  // We are now parsing a filename!
28  ParsingFilename = true;
29
30  // Lex the filename.
31  IndirectLex(FilenameTok);
32
33  // We should have obtained the filename now.
34  ParsingFilename = false;
35
36  // No filename?
37  if (FilenameTok.is(tok::eom))
38    PP->Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
39}
40
41/// getFileEntry - Return the FileEntry corresponding to this FileID.  Like
42/// getFileID(), this only works for lexers with attached preprocessors.
43const FileEntry *PreprocessorLexer::getFileEntry() const {
44  return PP->getSourceManager().getFileEntryForID(getFileID());
45}
46