[cfe-dev] How to get source text after preprocessing

[Vladimir]

Hello, everyone. I have some trouble. Earlier i'm using Lexer module to
getting source text. This sample code works fine, if my source file doesnt
have any #include directive:
clang::SourceLocation b(d->getLocStart()), _e(d->getLocEnd());
clang::SourceLocation e(clang::Lexer::getLocForEndOfToken(_e, 0, *sm,
lopt));
return std::string(sm->getCharacterData(b),
         sm->getCharacterData(e)-sm->getCharacterData(b));
But when i'm trying to get some location on file(which have some includes)
this code always returns trash. For example, attempt to get source filename
'sourceManager->getFilename(location)' returns null string.
Moreover, above code also returns incorrect values. I know that this fact
caused by preprocessor macroses and different files, but i dont know correct
way to get source text of AST (which represent preprocessed file). Do you
have any ideas? 



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