PreprocessorLexer.cpp revision 55fc873017f10f6f566b182b70f6fc22aefa3464 
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"
18using namespace clang;
19
20void PreprocessorLexer::anchor() { }
21
22PreprocessorLexer::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.
32void 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  IndirectLex(FilenameTok);
42
43  // We should have obtained the filename now.
44  ParsingFilename = false;
45
46  // No filename?
47  if (FilenameTok.is(tok::eod))
48    PP->Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
49}
50
51/// getFileEntry - Return the FileEntry corresponding to this FileID.  Like
52/// getFileID(), this only works for lexers with attached preprocessors.
53const FileEntry *PreprocessorLexer::getFileEntry() const {
54  return PP->getSourceManager().getFileEntryForID(getFileID());
55}
56