Re: [Boost-users] odd msvc 7.1 compilation errors with mpl

From: Küppers, Ben (ben.kuppers_at_[hidden])
Date: 2006-11-30 06:02:47

craigp wrote:
> For some reason, I can't get the IDE to compile BOOST_MPL_ASSERT.

<snip>

> anyone else seen something like this before?? all the mpl regression tests
> compile fine via bjam (using msvc 7.1), so it appears ide-specific,
> somehow...

I am seeing the same behaviour. I also noticed that a release build seems to be immune to this problem. Also, the problem goes away as soon as the two character types are replaced by template classes and the character types are passed in later.

#include <boost/type_traits/is_same.hpp>
#include <boost/mpl/assert.hpp>

template< class T, class U > struct my
{
BOOST_MPL_ASSERT( ( boost::is_same< T, U > ) ); // ok
};
my<char,char> test;

template< class T, class U > void f()
{
// ...
BOOST_MPL_ASSERT( ( boost::is_same< T, U > ) ); // ok
BOOST_MPL_ASSERT( ( boost::is_same< char, char > ) ); // ok
};

int main()
{
   f< char, char >();
   BOOST_MPL_ASSERT( ( boost::is_same< char, char > ) ); // fail
}

-Ben

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