craigp wrote:
For some reason, I can't get the IDE to compile BOOST_MPL_ASSERT. I tried this:
#include <boost/type_traits/is_same.hpp> #include <boost/mpl/assert.hpp>
int main() { BOOST_MPL_ASSERT(( boost::is_same< char, char > )); }
and it gives the following errors:
d:\dev\boost.cvs\boost\libs\fusion\example\extension\test_example.cpp(31) : error C2143: syntax error : missing ';' before '=' d:\dev\boost.cvs\boost\libs\fusion\example\extension\test_example.cpp(31) : error C2143: syntax error : missing ';' before '='
what's even stranger is that i copied/pasted the pre-processed file, and that compiled just fine:
static const std::size_t mpl_assertion_in_line_26 = sizeof( boost::mpl::assertion_failed<false>( boost::mpl::assert_arg( (void (*) ( boost::is_same< char, char > ))0, 1 ) ) );
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...
Hmm, I found: http://tinyurl.com/y6vxr7 IDE banishes __LINE__ out of constants? #define MYLINE __COUNTER__ // compiles // #define MYLINE __LINE__ // fails #define MY_MPL_ASSERT(pred) \ enum { \ BOOST_PP_CAT(mpl_assertion_in_line_,MYLINE) = sizeof( \ boost::mpl::assertion_failed<false>( \ boost::mpl::assert_arg( (void (*) pred)0, 1 ) \ ) \ ) \ }\ /**/ int main() { MY_MPL_ASSERT(( boost::is_same< char, char > )); } -- Shunsuke Sogame