PreprocessorLexer.cpp revision 74d15dfd183b2082e8a5d4dfbf66bd861b220901 
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/Basic/Diagnostic.h"
17#include "clang/Basic/SourceManager.h"
18
19using namespace clang;
20
21PreprocessorLexer::PreprocessorLexer(Preprocessor* pp, SourceLocation L)
22  :  PP(pp), FileID(pp->getSourceManager().getPhysicalLoc(L).getFileID()),
23     ParsingPreprocessorDirective(false),
24     ParsingFilename(false),
25     LexingRawMode(false) {}
26
27PreprocessorLexer::~PreprocessorLexer() {}
28
29void PreprocessorLexer::Diag(SourceLocation Loc, unsigned DiagID,
30                             const std::string &Msg) const {
31  PP->Diag(Loc, DiagID) << Msg;
32}
33
34/// LexIncludeFilename - After the preprocessor has parsed a #include, lex and
35/// (potentially) macro expand the filename.
36void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
37  assert(ParsingPreprocessorDirective &&
38         ParsingFilename == false &&
39         "Must be in a preprocessing directive!");
40
41  // We are now parsing a filename!
42  ParsingFilename = true;
43
44  // Lex the filename.
45  IndirectLex(FilenameTok);
46
47  // We should have obtained the filename now.
48  ParsingFilename = false;
49
50  // No filename?
51  if (FilenameTok.is(tok::eom))
52    Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
53}
54