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Fix up busted tag replacement

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[SVN r21500]
This commit is contained in:
Dave Abrahams
2004-01-05 15:04:58 +00:00
parent 3f839a6698
commit 52a0676691
1 changed files with 24 additions and 21 deletions
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9
include/boost/mpl/aux_/has_xxx.hpp
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@@ -34,22 +34,25 @@
# define BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(trait, name, unused) \ # define BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(trait, name, unused) \
template< typename T > \ template< typename T > \
struct trait \ struct trait \
{ \
struct helpers \
{ \ { \
template< typename U > \ template< typename U > \
static boost::mpl::aux::yes_tag \ static boost::mpl::aux::yes_tag \
helper( \ test( \
boost::mpl::aux::type_wrapper<U> const volatile* \ boost::mpl::aux::type_wrapper<U> const volatile* \
, boost::mpl::aux::type_wrapper<BOOST_MSVC_TYPENAME U::name>* = 0 \ , boost::mpl::aux::type_wrapper<BOOST_MSVC_TYPENAME U::name>* = 0 \
); \ ); \
\ \
static boost::mpl::aux::no_tag \ static boost::mpl::aux::no_tag \
helper(...); \ test(...); \
}; \
\ \
typedef boost::mpl::aux::type_wrapper<T> t_; \ typedef boost::mpl::aux::type_wrapper<T> t_; \
\ \
BOOST_STATIC_CONSTANT( \ BOOST_STATIC_CONSTANT( \
bool, value = \ bool, value = \
sizeof(trait<T>::helper(static_cast<t_*>(0))) \ sizeof(helpers::test(static_cast<t_*>(0))) \
== sizeof(boost::mpl::aux::yes_tag) \ == sizeof(boost::mpl::aux::yes_tag) \
); \ ); \
}; \ }; \