lib/Lex/PreprocessorLexer.cpp

   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/Lex/LexDiagnostic.h"
  17 #include "clang/Basic/SourceManager.h"
  18 using namespace clang;
  19
  20 /// LexIncludeFilename - After the preprocessor has parsed a #include, lex and
  21 /// (potentially) macro expand the filename.
  22 void PreprocessorLexer::LexIncludeFilename(Token &FilenameTok) {
  23   assert(ParsingPreprocessorDirective &&
  24          ParsingFilename == false &&
  25          "Must be in a preprocessing directive!");
  26
  27   // We are now parsing a filename!
  28   ParsingFilename = true;
  29
  30   // Lex the filename.
  31   IndirectLex(FilenameTok);
  32
  33   // We should have obtained the filename now.
  34   ParsingFilename = false;
  35
  36   // No filename?
  37   if (FilenameTok.is(tok::eom))
  38     PP->Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename);
  39 }
  40
  41 /// getFileEntry - Return the FileEntry corresponding to this FileID.  Like
  42 /// getFileID(), this only works for lexers with attached preprocessors.
  43 const FileEntry *PreprocessorLexer::getFileEntry() const {
  44   return PP->getSourceManager().getFileEntryForID(getFileID());
  45 }