Am 23.07.2014 15:04, schrieb Michael Powell:

Hello,

I would like to add some diagnostic messages during compile time, potentially enumerating one or more types as well.

static_assert is great for simple messages but falls a bit short due to inability to list types and such.

I wonder if BOOST_MPL_ASSERT_MSG is the right answer, however, I am getting the following errors:

BOOST_MPL_ASSERT_MSG( std::is_base_of::value , "requested type is not a node" , (types) );

1>i:\source\kingdom software\cppxml\xml\domain\parts\xnode.h(111): warning C4002: too many actual parameters for macro 'BOOST_MPL_ASSERT_MSG'

Try to play preprocessor yourself. How many commas do you count in the invocation of BOOST_MPL_ASSERT_MSG ? Stefan -- ---------------------------------------------------------------- /dev/random says: Useless Invention: Electric dog polisher. python -c "print '73746566616e2e6e616577654061746c61732d656c656b74726f6e696b2e636f6d'.decode('hex')" GPG Key fingerprint = 2DF5 E01B 09C3 7501 BCA9 9666 829B 49C5 9221 27AF

Hi Michael, You need brackets around 'is_base_of' expression , because there is a colon in it. "request type is not a node" has to be changed to be a legal C++ identifier token as well ( http://www.boost.org/doc/libs/1_55_0/libs/mpl/doc/refmanual/assert-msg.html ). BOOST_MPL_ASSERT_MSG( (std::is_base_of::value) , requested_type_is_not_a_node , (types) ); Kris On Wed, Jul 23, 2014 at 2:04 PM, Michael Powell wrote:

Hello,

I would like to add some diagnostic messages during compile time, potentially enumerating one or more types as well.

static_assert is great for simple messages but falls a bit short due to inability to list types and such.

I wonder if BOOST_MPL_ASSERT_MSG is the right answer, however, I am getting the following errors:

BOOST_MPL_ASSERT_MSG( std::is_base_of::value , "requested type is not a node" , (types) );

1>i:\source\kingdom software\cppxml\xml\domain\parts\xnode.h(111): warning C4002: too many actual parameters for macro 'BOOST_MPL_ASSERT_MSG'

It's an error message, but not the one(s) I am expecting. Do I need to enable something, preprocessor definition, something like that?

Best regards,

Michael Powell _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users