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

David-Sarah Hopwood david-sarah at jacaranda.org
Thu Oct 22 22:35:08 PDT 2009


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).

Can that not be done by using '\n'+ where you had '\n' before?

-- 
David-Sarah Hopwood  ⚥  http://davidsarah.livejournal.com



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