[antlr-interest] Seperating grammar and actions

["Paul Bouché (NSN)"]

Hi Induh,

usually what people do is write an Abstract Syntax Tree (AST) grammar 
which constructs an AST and then you can use different AST parsers which 
have the different actions.

Or you could use try this 
http://www.antlr.org/wiki/display/ANTLR3/Composite+Grammars

BR,
Paul

Indhu Bharathi schrieb:
>
> Hi,
>
>  
>
> Is there a way to separate grammar and actions into two different 
> files? This will be helpful when multiple people are working with the 
> same grammar file (each might write their own actions for the same 
> production) and don't want to create redundant copies of the grammar file.
>
>  
>
> One way I thought was to implement observer pattern. The parser will 
> be the subject and multiple observers can register to the same 
> production and do different things. Another way would be to write a 
> tool to separate the actions from the grammar file and reattach it. 
> This way, actions can be separated out and maintained in a separate 
> file and can be reattached when necessary and changes to grammar can 
> be done in one centralized file.
>
>  
>
> Is there any other way to do this? Any hint might be useful.
>
>  
>
> Thanks, Indhu
>
>  
>
>  
>
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>
>
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-- 
Paul Bouché
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