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reverted recent changes

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[SVN r31255]
This commit is contained in:
Jonathan Turkanis
2005-10-10 00:18:38 +00:00
parent 17dc7e2156
commit db9f7d57ea
1 changed files with 0 additions and 54 deletions
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54
include/boost/detail/is_incrementable.hpp
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@ -9,61 +9,8 @@
# include <boost/type_traits/remove_cv.hpp>
# include <boost/mpl/aux_/lambda_support.hpp>
# include <boost/mpl/bool.hpp>
# include <boost/config.hpp> // BOOST_INTEL
# include <boost/detail/workaround.hpp>
# if defined(__GNUC_PATCHLEVEL__) && !defined(BOOST_INTEL)
# define BOOST_IS_INCREMENTABLE_GCC \
((__GNUC__ * 100UL + __GNUC_MINOR__) * 100UL + __GNUC_PATCHLEVEL__) \
/**/
# else
# define BOOST_IS_INCREMENTABLE_GCC 0
# endif
# if BOOST_WORKAROUND(BOOST_IS_INCREMENTABLE_GCC, >= 40002)
namespace boost { namespace detail { namespace is_incrementable_ {
// A type returned from operator++ when no increment is found in the
// type's own namespace
struct tag {};
// In case an operator++ is found that returns void, we'll use ++x,0
tag operator,(tag,int);
// Two check overloads help us identify which operator++ was picked
char (& check(tag) )[2];
template <class T>
char check(T const&);
template<typename T>
struct impl {
template<typename U>
friend tag operator++(const U&);
template<typename U>
friend tag operator++(const U&, int);
static typename boost::remove_cv<T>::type& x;
static const bool is_incrementable =
sizeof(is_incrementable_::check((++x,0))) == 1;
static const bool is_postfix_incrementable =
sizeof(is_incrementable_::check((x++,0))) == 1;
};
} // namespace is_incrementable_
template< typename T,
typename B = typename is_incrementable_::template impl<T> >
struct is_incrementable : mpl::bool_<B::is_incrementable> { };
template< typename T,
typename B = typename is_incrementable_::template impl<T> >
struct is_postfix_incrementable : mpl::bool_<B::is_postfix_incrementable> { };
} } // namespace boost::detail
# else
namespace boost { namespace detail {
// is_incrementable<T> metafunction
@ -152,6 +99,5 @@ BOOST_TT_AUX_TEMPLATE_ARITY_SPEC(1, ::boost::detail::is_postfix_incrementable)
} // namespace boost
# endif // # if BOOST_WORKAROUND(BOOST_IS_INCREMENTABLE_GCC, >= 40002)
#endif // IS_INCREMENTABLE_DWA200415_HPP