[cfe-dev] Need Help Printing Preprocessed Code and Modifying CFG

[Béatrice Creusillet]

Hi Kevin,

Le 03/07/2013 20:00, Kevin Boos a écrit :
> I've looked into the ASTMatcher's abilities, those are very nice but not
> terribly useful for me.
>
> I think I've narrowed down what I really need from Clang -- the ability
> to delete a note from the AST/CFG and then output that modified AST as
> source code.
>
> I know that I can printPretty() the source code of an AST or use the
> Rewriter to generate the code. So basically I just need to know how to
> remove a Stmt or other node from the AST/CFG.

Although this is not usually recommended, it is possible to remove nodes 
of the AST, for instance using TreeTransform. If your node is part of a 
sequence of statements, you basically build a new vector of statements 
-- without the nodes you don't need -- in your own version of 
TransformCompoundStmt, and then rebuild the underlying tree using 
RebuildCompoundStmt. There has been a thread about that earlier this year.

Regards,

-- 
Béatrice Creusillet
SILKAN - www.silkan.com