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"
18 #include "clang/Lex/Token.h"
19 #include <cassert>
20 
21 using namespace clang;
22 
23 void PreprocessorLexer::anchor() {}
24 
25 PreprocessorLexer::PreprocessorLexer(Preprocessor *pp, FileID fid)
26     : PP(pp), FID(fid) {
27   if (pp)
28     InitialNumSLocEntries = pp->getSourceManager().local_sloc_entry_size();
29 }
30 
31 /// After the preprocessor has parsed a \#include, lex and
32 /// (potentially) macro expand the filename.
33 void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
34   assert(ParsingPreprocessorDirective &&
35          ParsingFilename == false &&
36          "Must be in a preprocessing directive!");
37 
38   // We are now parsing a filename!
39   ParsingFilename = true;
40 
41   // Lex the filename.
42   if (LexingRawMode)
43     IndirectLex(FilenameTok);
44   else
45     PP->Lex(FilenameTok);
46 
47   // We should have obtained the filename now.
48   ParsingFilename = false;
49 
50   // No filename?
51   if (FilenameTok.is(tok::eod))
52     PP->Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
53 }
54 
55 /// getFileEntry - Return the FileEntry corresponding to this FileID.  Like
56 /// getFileID(), this only works for lexers with attached preprocessors.
57 const FileEntry *PreprocessorLexer::getFileEntry() const {
58   return PP->getSourceManager().getFileEntryForID(getFileID());
59 }
60