[boost] Re: [lambda] better switch syntax

From: David Abrahams (dave_at_[hidden])
Date: 2003-10-17 13:27:46

"Joel de Guzman" <joel_at_[hidden]> writes:

> One more alternative, using MPL is:
>
>     switch_(condition)
>     [
>         case_(int_<label1>())[expr1],
>         case_(int_<label2>())[expr2],
>         case_(int_<label3>())[expr3],
>         default_(expr4)
>     ]
>
> Yaiks!
>
> Actually,
>
>      switch_(condition)
>     [
>         case_(label1)[expr1],
>         case_(label2)[expr2],
>         case_(label3)[expr3]
>         default_[expr4]
>     ]
>
> will work if label1..3 is declared as (example):
>
>     mpl::int_<1> label1;
>
>     mpl::int_<2> label2;
>
>     mpl::int_<3> label3;
>
> Choose your pick :-)

I prefer those two for consistency's sake.  Square brackets should
always mean the same thing in Phoenix/LL if possible.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com