tree f9b755c065acd7a8cac2b629d79d55f7e354f45a
parent aea3ad073793f7764aa914bd9e551f858a0b5739
author Chris Lattner <sabre@nondot.org> 1223784348 +0000
committer Chris Lattner <sabre@nondot.org> 1223784348 +0000

Add a new mode to the lexer which enables it to return all characters,
even whitespace, as tokens from the file.  This is enabled with
L->SetKeepWhitespaceMode(true) on a raw lexer.  In this mode, you too
can use clang as a really complex version of 'cat' with code like this:

  Lexer RawLex(SourceLocation::getFileLoc(SM.getMainFileID(), 0),
               PP.getLangOptions(), File.first, File.second);
  
  RawLex.SetKeepWhitespaceMode(true);
  
  Token RawTok;
  RawLex.LexFromRawLexer(RawTok);
  while (RawTok.isNot(tok::eof)) {
    std::cout << PP.getSpelling(RawTok);
    RawLex.LexFromRawLexer(RawTok);
  }

This will emit exactly the input file, with no canonicalization or other
translation.  Realistic clients actually do something with the tokens of
course :)


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57401 91177308-0d34-0410-b5e6-96231b3b80d8