Re: Selective Compilation

[Akim Demaille]

Le 8 févr. 2011 à 00:34, Evan Lavelle a écrit :

> On 07/02/2011 23:13, Tejas Kajarekar wrote:
>> Hi Martin,
>> If I understand your question correctly, here is a way to have multiple
>> scanners and parsers in the same program.
> 
> No, he's asking about using a subset of an existing grammar in a new parser.
> 
> Example: I have a language which includes a complex expression syntax. I also 
> have a separate preprocessor for the same language, which uses exactly the 
> same expression syntax. This means that I need to write two completely 
> separate flex/bison files, and maintain both of them, even though one of them 
> is a subset of the other one.
> 
> This would be a nice feature - I think it's been asked for before on this 
> list.

Yes, and that makes it an FAQ, see section 11.5 of the documentation.