[antlr-interest] [C target] how to skip empty lines

[William B. Clodius]

On Oct 22, 2009, at 11:31 PM, Юрушкин Михаил wrote:

> David-Sarah Hopwood <david-sarah at jacaranda.org> писал(а) в  
> своём письме  Fri, 23 Oct 2009 09:20:32 +0400:
>> Юрушкин Михаил wrote:>> first example: stmnt <\n> stmnt  
>> <\n> stmnt <;> <\n> // i mean <\n> is>> enough to seperate  
>> statements.
>> >> For most languages that do that, it's sufficient to add an  
>> empty  > statement> rule in the parser.
> mm.. empty lines can be in every place of grammar: between  
> statements,  procedures, declarations etc where empty_statement rule  
> isn't exist.I think it's important to skip redudant <\n> on lexer  
> level... but i don't  know how to do that clearly (without  
> overriding nextToken for example).
> -- Best regards,Michael
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FWIW Fortran handles this by defining empty lines to be comments so  
they are normally discarded with other comments or whitespace.