[antlr-interest] How an alternative rule can emit code conditionally on the type of the parent node?

[Aggelos Biboudis]

It seems dynamic scoping is the solution to this.

Thx,
Aggelos B.

On Wed, Sep 26, 2012 at 2:12 PM, Aggelos Biboudis <biboudis at gmail.com>wrote:

> Dear all,
>
> I am using the C grammar with rewrite option on. I would like to know if
> it is possible for my alternative rule (after the "->"), to emit code
> depending on the type of the parent node. I want to rewrite the token
> buffer in-place (following the book for source-to-source translations when
> performing slight modifications/instrumentation) only in compound
> statements. My intention is to emit a preamble after the first "{" only if
> the compound statement originates from a selection, iteration or jump
> statement. For example: I would like to rewrite the if (expr) {
> statement1;} to if (expr) { my_statement; statement1;}. Is that conditional
> rewriting possible, following the token-buffer edit way?
>
> I am using the usual ANSI C grammar<http://www.antlr.org/grammar/1153358328744/C.g>and following the definitive ANTLR reference.
>
> Any help appreciated.
> Aggelos B.
>