[news.eclipse.technology.dltk] Semantic checking - via validators?

["Chuck Doucette" <cdoucette@xxxxxxxxxxx>]

Thanks to ANTLR and DLTK, I now have an advanced editor which can 
immediately flag syntactic problems in our language source files.

My question is if/when/how should I find/flag semantic errors in the source 
file?

1.    Is there any part of DLTK framework which could/should be used to 
invoke/perform semantic checks?    I assume the answer to this is no. I know 
you support external validators - but we'd like the semantic checking to be 
performed implicitly.

2.    When should semantic checks be performed - whenever the parser is 
invoked?

3.    How should errors be reported - using the parser's error reporter?
        Also, how can we determine the line number for populating IProblem 
in the file if that information is:
        a) not available in DLTKToken
        b) not kept in ASTNode

Thanks,
Chuck