Re: [boost] static_assert.hpp

From: Peter Dimov (pdimov_at_[hidden])
Date: 2001-11-24 08:15:07

From: "Andrei Alexandrescu" <andrewalex_at_[hidden]>
> Is there a chance of adding a loki-like macro to static_assert.hpp that
> would allow a user-defined message to be (likely) included in the error
> message?
>
> The idea is to allow the user to specify an error message in the form of
an
> identifier.
>
> #define STATIC_ASSERT_MSG(b, msg) \
>     { \
>         struct msg \
>         { \
>             msg(::boost::loki::int2type<true>) {} \
>         } msg(::boost::loki::int2type<(b) != 0>()); \
>     }

I use

typedef char error_message_here[expr];

Not as elegant as a macro and doesn't use int2type, granted. ;-)

--
Peter Dimov
Multi Media Ltd.