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[boost][range] - fix a very odd compilation problem in range_size that only occurs on clang 4.2 on the Mac (clang 4.2 on linux is fine)

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[SVN r85717]
This commit is contained in:
Neil Groves
2013-09-16 23:23:38 +00:00
parent cca9739022
commit 34cea300e5
1 changed files with 8 additions and 0 deletions
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8
include/boost/range/size_type.hpp
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@ -76,14 +76,22 @@ namespace boost
struct range_size :
detail::range_size<T>
{
// Very strange things happen on some compilers that have the range concept
// asserts disabled. This preprocessor condition is clearly redundant on a
// working compiler but is vital for at least some compilers such as clang 4.2
// but only on the Mac!
#if BOOST_RANGE_ENABLE_CONCEPT_ASSERT == 1
BOOST_RANGE_CONCEPT_ASSERT((boost::SinglePassRangeConcept<T>));
#endif
};
template< class T >
struct range_size<const T >
: detail::range_size<T>
{
#if BOOST_RANGE_ENABLE_CONCEPT_ASSERT == 1
BOOST_RANGE_CONCEPT_ASSERT((boost::SinglePassRangeConcept<T>));
#endif
};
} // namespace boost