Re: [Boost-users] [mpl] BOOST_MPL_ASSERT_MSG for static_assert

On Wed, Jul 23, 2014 at 8:30 AM, Stefan Näwe wrote:

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 ?

Good eyes... BOOST_MPL_ASSERT_MSG( (std::is_base_of::value) , "requested type is not a node" , (types) ); Thank ye.

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