Re: [Flex-help] Using empty string as pattern

[Erik S. <man...@gm...>]

On Wednesday 16 August 2006 10:36, Edsko de Vries wrote:
> On Wed, Aug 16, 2006 at 09:13:29AM +0200, Erik Sandberg wrote:
> > Hi,
> >
> > I'd like to use the empty string as a pattern in flex. I have tried a
> You could do something like
>
> <newarg>(.|\n)	yyless(0); pop the stack; return a token;

Thanks! Something similar solves my problem: When the lexer encounters a 
function of arity 2, it expands it to three tokens using your technique:
FUNCTION EXPECT_ARG EXPECT_ARG
Then bison's rule for argument list looks like
arg_list: /*empty*/ | EXPECT_ARG arg_list argument;
That way, I can create functions of any arity, without argument separators.

Thanks for your help!
-- 
Erik