Re: [boost] [Spirit-general] [ANN] Phoenix-2 prerelease

From: Joel de Guzman (joel_at_[hidden])
Date: 2005-10-14 00:53:10

Daryle Walker wrote:

> I don't think so.  The comma used to separate function (call) arguments
> always overrides a comma operator.  In fact, the docs for the block
> statement (as of 2005-Oct-13) mention that:
> 
> //=====================================================================
> Outside the square brackets, block statements should be grouped. For
> example:
> 
>     //------------------------------------------
>     for_each(c.begin(), c.end(),
>         (
>             do_this(arg1),
>             do_that(arg1)
>         )
>     );
>     //------------------------------------------
> //=====================================================================
> 
> Wrapping a comma operator chain around a parentheses pair blocks the
> interpretation as an argument separator.  The reason for the exception for
> the square bracket operator is that the operator always takes exactly one
> argument, so it "transforms" any attempt at multiple arguments with a comma
> operator chain (and spits out an error for zero arguments).

I think this is a good explanation. I updated the docs and
added this.

Thanks,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net