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      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 using namespace clang;
     19 
     20 void PreprocessorLexer::anchor() { }
     21 
     22 PreprocessorLexer::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.
     32 void 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   if (LexingRawMode)
     42     IndirectLex(FilenameTok);
     43   else
     44     PP->Lex(FilenameTok);
     45 
     46   // We should have obtained the filename now.
     47   ParsingFilename = false;
     48 
     49   // No filename?
     50   if (FilenameTok.is(tok::eod))
     51     PP->Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
     52 }
     53 
     54 /// getFileEntry - Return the FileEntry corresponding to this FileID.  Like
     55 /// getFileID(), this only works for lexers with attached preprocessors.
     56 const FileEntry *PreprocessorLexer::getFileEntry() const {
     57   return PP->getSourceManager().getFileEntryForID(getFileID());
     58 }
     59