[cfe-dev] lookup from AST

[Chris Lattner]

On Oct 15, 2009, at 6:06 AM, Axel Naumann wrote:

> Hi,
>
> progress, but not enough:
>
> Axel Naumann wrote on 10/15/2009 10:58 AM:
>> Should I create an IdentifierTable and put that single name (and its
>> declaring contexts) that I want to look up in there? Or is there a
>> simpler way of creating a DeclarationName from a string?
>
> of course this is the wrong approach; I should first lex the string.  
> But
> building a full blown preprocessor every time I need to lex a string
> like "nsp::class" looks a bit heavy. Is there a shortcut? Is it
> Preprocessor::CreateString()?

If you have an ASTContext, you should be able to get to the identifier  
table it refers to.  Based on that, you can use Table->get("foo") to  
get a uniqued identifierinfo*.

-Chris