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 
19 using namespace clang;
20 
21 PreprocessorLexer::PreprocessorLexer(Preprocessor* pp, SourceLocation L)
22   :  PP(pp), FileID(pp->getSourceManager().getPhysicalLoc(L).getFileID()),
23      ParsingPreprocessorDirective(false),
24      ParsingFilename(false),
25      LexingRawMode(false) {}
26 
27 PreprocessorLexer::~PreprocessorLexer() {}
28 
29 void 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.
36 void 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