Proto for Boost mailing list page: Re: [proto] Restructuring noses in generator

Subject: Re: [proto] Restructuring noses in generator
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2012-04-28 06:38:56

On 27/04/12 21:47, Joel Falcou wrote:
> How can I use a custom generator to turn a specific node expression into
> a different version of itself without triggering endless recursive call ?
>
> My use cas is the following, i want to catch all function node looking
> like
>
> tag::function( some_terminal, grammar, ..., grammar )
>
> with any nbr of grammar instances
>
> into
>
> tag::function( some_terminal, my_tuple_terminal<grammar, ..., grammar>,
> some_other_info )
>
> basically makign n-ary function node into ternayr node with a specific
> structures. Of course this new node should live in whatever domain
> some_terminal is coming from.
>
> My first attempt was using make_expr in my generator but it endlessly
> looped at compile time.
>
> Is there somethign I am missing ?

You could just make make_expr use the default_domain to avoid the recursion.