comment inline... Jean-Louis Leroy schrieb:

What's wrong with this ?

template void check_placeholders(const T&) { BOOST_MPL_ASSERT((is_same)); // * boost::is_same }

struct Test { typedef int placeholders; };

void f() { check_placeholders<int>(Test()); }

msvc9 complains about : error C2059: syntax error : ')' at the line marked with a star. I have put much more complex things inside BOOST_MPL_ASSERT though :-/

I use Boost 1.40.

J-L

-Christopher