[cfe-dev] PPCallbacks problem

[Argyrios Kyrtzidis]

Look into ASTUnit::LoadFromCompilerInvocationAction that accepts a ASTFrontendAction, giving you more control over the parsing process.

On Apr 22, 2013, at 2:01 AM, boba2001 <asasasdd at mail.ru> wrote:

> Hi! I faced with following problem. I want to get information about macros. I
> understood that its possible with class PPCallbacks. I created my class
> MacroFinder, which was inherited from PPCallbacks, defined method
> MacroFinder::Ifdef and used the class in following code. However method
> MacroFinder::Ifdef weren`t calling. As I understood, it happens because an
> instance of Preprocessor is created inside
> ASTUnit::LoadFromCompilerInvocation(), and my callbacks are set after
> parsing was finished. Can you teel me please how to install a callbacks?
> 
>    ClangParser::ClangParser(std::vector< const char *> & args_) :
>        args(args_)
>    {
>        const char ** opts = &args.front();
>        int opts_num = args.size();
> 
>        CompilerInstance oCompilerInstance;
>        oCompilerInstance.createDiagnostics(
>            opts_num, // Argc
>            opts,     // Argv
>            0,        // Client
>            true,     // ShouldOwnClient
>            false     // ShouldCloneClient
>        );
> 
>        IntrusiveRefCntPtr< DiagnosticsEngine >
> diags(&oCompilerInstance.getDiagnostics());
> 
>        IntrusiveRefCntPtr< CompilerInvocation > compInvoke =
> clang::createInvocationFromCommandLine(
>            makeArrayRef(opts, opts + opts_num), // Args
>            diags                                // Diags
>        );
> 
>        if (!compInvoke) {
>            std::cout << "Can't create compiler invocation for given args" ;
>            return -1;
>        } else {
>            tu = ASTUnit::LoadFromCompilerInvocation(
>                compInvoke.getPtr(), // CI
>                diags,               // Diags
>                false,               // OnlyLocalDecls
>                true,                // CaptureDiagnostics
>                false,               // PrecompilePreamble
>                TU_Prefix,           // TUKind
>                false,               // CacheCodeCompletionResults
>                false,               // IncludeBriefCommentsInCodeCompletion
>                false                // UserFilesAreVolatile
>            );
> 
>            MacroFinder oMacroFinder;
>            tu -> getPreprocessor().addPPCallbacks(&oMacroFinder);
>        }
>    }
> 
> 
> 
> --
> View this message in context: http://clang-developers.42468.n3.nabble.com/PPCallbacks-problem-tp4031625.html
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