Hi,
on 1.43 boost it seems that BOOST_STATIC_ASSERT just allows to put a boolean value, is there some alternative that allows me to display a message as well on the compile error?
+2
A:
MPL has BOOST_MPL_ASSERT_MSG. E.g. using GCC 4.2. with this:
BOOST_MPL_ASSERT_MSG(false, THIS_DOESNT_WORK, (void));
... results in:
/path/to/file.cpp:42: error: no matching function for call to
'assertion_failed(mpl_::failed************ (function()::THIS_DOESNT_WORK::************)())'
Georg Fritzsche
2010-07-13 21:39:39
+1
A:
Have you tried something like:
BOOST_STATIC_ASSERT(sizeof(long) == 64 && "Must have 64-bit long!")
If your compiler supports the C++0x static_assert, you can do:
static_assert(sizeof(long) == 64, "Must have 64-bit long!")
reece
2010-07-13 21:42:59
i tried this but i got this error:error: invalid application of ‘sizeof’ to incomplete type ‘boost::STATIC_ASSERTION_FAILURE<false>’
lurscher
2010-07-13 21:56:56
@lurscher That is the message that BOOST_STATIC_ASSERT always gives. Use BOOST_MPL_ASSERT_MSG like Georg says to
KitsuneYMG
2010-07-14 12:00:28