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 
24 PreprocessorLexer::~PreprocessorLexer() {}
25 
26 void PreprocessorLexer::Diag(SourceLocation Loc, unsigned DiagID,
27                              const std::string &Msg) const {
28   if (LexingRawMode && Diagnostic::isBuiltinNoteWarningOrExtension(DiagID))
29     return;
30   PP->Diag(Loc, DiagID) << Msg;
31 }
32 
33 /// LexIncludeFilename - After the preprocessor has parsed a #include, lex and
34 /// (potentially) macro expand the filename.
35 void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
36   assert(ParsingPreprocessorDirective &&
37          ParsingFilename == false &&
38          "Must be in a preprocessing directive!");
39 
40   // We are now parsing a filename!
41   ParsingFilename = true;
42 
43   // Lex the filename.
44   IndirectLex(FilenameTok);
45 
46   // We should have obtained the filename now.
47   ParsingFilename = false;
48 
49   // No filename?
50   if (FilenameTok.is(tok::eom))
51     Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
52 }
53