[antlr-interest] Re: Line number

[micheal_jor <open.zone at virgin.net>]

>   Hi all,
> 
> I have seen a lot of post regarding about display the line number 
in the 
> AST vew. However, there is no clear and example of how to do it. I 
am 
> currently using antlr 2-7.2.
>    Could you please let me know how to get it done. Thanks.
> 
> Regards,
> MiMi

If you are using Java or C# and, if by "AST view" you mean the 
ASTFrame mechanism for viewing your ASTs then you can do the 
following:

1. Create a subclass of the appropriate standard Common***AST class 
(if you haven't already)
2. Override toString()/ToString() to print line numbers as well
3. Instruct your parser to use your new AST class with 
parser.setASTNodeType(string) or by using the "ASTLableType" option 
in your grammar.

Run your app as usual  ;-)

Micheal



 

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