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fix metafunctions for MPL

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[SVN r17621]
This commit is contained in:
Dave Abrahams 2003-02-25 00:57:33 +00:00
parent 80df1d8f12
commit 37a6537a5b
1 changed files with 6 additions and 5 deletions
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11
include/boost/ref.hpp
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@ -7,6 +7,7 @@
# include <boost/config.hpp>
# include <boost/utility/addressof.hpp>
# include <boost/mpl/bool_c.hpp>
//
// ref.hpp - ref/cref, useful helper functions
@ -73,16 +74,14 @@ template<class T> inline reference_wrapper<T const> BOOST_REF_CONST cref(T const
# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template<typename T>
class is_reference_wrapper
: public mpl::false_c
{
public:
BOOST_STATIC_CONSTANT(bool, value = false);
};
template<typename T>
class is_reference_wrapper<reference_wrapper<T> >
: public mpl::true_c
{
public:
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
@ -144,8 +143,10 @@ class is_reference_wrapper
public:
BOOST_STATIC_CONSTANT(
bool, value = (
sizeof(detail::is_reference_wrapper_test(type<T>()))
sizeof(detail::is_reference_wrapper_test(type<T>()))
== sizeof(detail::yes_reference_wrapper_t)));
typedef ::boost::mpl::bool_c<value> type;
};
template <typename T>