Re: [Boost-users] Syntax question

19 Aug 2005


      I believe it's because you can't && an expression to be used within a static 
assert.
How about the following:

========================
struct attempt_to_invoke_functor_with_incorrect_number_of_arguments
    : mpl::int_<1>
{
};

template<typename SEQ, int SIZE>
void assertSeqSize()
{
   BOOST_STATIC_ASSERT(( mpl::and_<
        boost::equal_to<boost::mpl::size<SEQ>::type, boost::mpl::int_<SIZE>
...
, attempt_to_invoke_functor_with_incorrect_number_of_arguments
    ));
}
========================

HTH

Pablo

"Stephen Gross" <sgross@darwin.epbi.cwru.edu> wrote in message 
news:004d01c5a4f4$9cbf10b0$8df51681@sgross...
...
I'm trying to static assert the value of a sequence. I've got the syntax
slightly wrong, but I can't quite figure it out. Here's what my code looks
like:
==========================
template<typename SEQ, int SIZE>
void assertSeqSize()
{
 BOOST_STATIC_ASSERT(( boost::equal_to<boost::mpl::size<SEQ>::type,
boost::mpl::int_<SIZE> > )) &&
 "You have attempted to invoke a functor with the incorrect number of
Arguments.";
}
==========================
[snip]
...
--Steve
Stephen Gross
Case Western School of Medicine
Cleveland, OH
"By Grabthar's hammer, by the sons of Worvan, you shall be avenged." - Dr.
Lazarus

Pablo Aguilar