David Abrahams writes:
"Jonathan Turkanis" <technews@kangaroologic.com> writes:
I liked BOOST_MPL_ASSERT_IS_SAME because I didn't have to use double parantheses.
But you were out of luck if one of the types contained commas.
BOOST_MPL_ASSERT_IS_SAME(T, pair<int, long>) // error!
and no amount of parenthesization could fix it.
Not to mention that when the assertion actually failed, you couldn't see what *is* the T. Now you get a beautiful error along these lines: C:\home\depot\stuff\asserts.cpp(8) : error C2664: 'boost::mpl::assertion_failed' : cannot convert parameter 1 from 'boost::mpl::failed ************boost::is_same<T,U>::* *********** ' to 'boost::mpl::assert<false>::type' with [ T=std::pair<int,char>, U=std::pair<int,long> ] A reference that is not to 'const' cannot be bound to a non-lvalue -- Aleksey Gurtovoy MetaCommunications Engineering