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Diffstat (limited to 'src/third_party/boost-1.60.0/boost/type_traits/is_enum.hpp')
-rw-r--r-- | src/third_party/boost-1.60.0/boost/type_traits/is_enum.hpp | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/boost/type_traits/is_enum.hpp b/src/third_party/boost-1.60.0/boost/type_traits/is_enum.hpp new file mode 100644 index 00000000000..eada480a658 --- /dev/null +++ b/src/third_party/boost-1.60.0/boost/type_traits/is_enum.hpp @@ -0,0 +1,166 @@ + +// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard +// Hinnant & John Maddock 2000. +// Use, modification and distribution are subject to the Boost Software License, +// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt). +// +// See http://www.boost.org/libs/type_traits for most recent version including documentation. + + +#ifndef BOOST_TT_IS_ENUM_HPP_INCLUDED +#define BOOST_TT_IS_ENUM_HPP_INCLUDED + +#include <boost/type_traits/intrinsics.hpp> +#include <boost/type_traits/integral_constant.hpp> +#ifndef BOOST_IS_ENUM +#include <boost/type_traits/add_reference.hpp> +#include <boost/type_traits/is_arithmetic.hpp> +#include <boost/type_traits/is_reference.hpp> +#include <boost/type_traits/is_convertible.hpp> +#include <boost/type_traits/is_array.hpp> +#ifdef __GNUC__ +#include <boost/type_traits/is_function.hpp> +#endif +#include <boost/type_traits/detail/config.hpp> +#if defined(BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION) +# include <boost/type_traits/is_class.hpp> +# include <boost/type_traits/is_union.hpp> +#endif +#endif + +namespace boost { + +#ifndef BOOST_IS_ENUM +#if !(defined(__BORLANDC__) && (__BORLANDC__ <= 0x551)) + +namespace detail { + +#if defined(BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION) + +template <typename T> +struct is_class_or_union +{ + BOOST_STATIC_CONSTANT(bool, value = ::boost::is_class<T>::value || ::boost::is_union<T>::value); +}; + +#else + +template <typename T> +struct is_class_or_union +{ +# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x581))// we simply can't detect it this way. + BOOST_STATIC_CONSTANT(bool, value = false); +# else + template <class U> static ::boost::type_traits::yes_type is_class_or_union_tester(void(U::*)(void)); + +# if BOOST_WORKAROUND(__MWERKS__, <= 0x3000) // no SFINAE + static ::boost::type_traits::no_type is_class_or_union_tester(...); + BOOST_STATIC_CONSTANT( + bool, value = sizeof(is_class_or_union_tester(0)) == sizeof(::boost::type_traits::yes_type)); +# else + template <class U> + static ::boost::type_traits::no_type is_class_or_union_tester(...); + BOOST_STATIC_CONSTANT( + bool, value = sizeof(is_class_or_union_tester<T>(0)) == sizeof(::boost::type_traits::yes_type)); +# endif +# endif +}; +#endif + +struct int_convertible +{ + int_convertible(int); +}; + +// Don't evaluate convertibility to int_convertible unless the type +// is non-arithmetic. This suppresses warnings with GCC. +template <bool is_typename_arithmetic_or_reference = true> +struct is_enum_helper +{ + template <typename T> struct type + { + BOOST_STATIC_CONSTANT(bool, value = false); + }; +}; + +template <> +struct is_enum_helper<false> +{ + template <typename T> struct type + { + static const bool value = ::boost::is_convertible<typename boost::add_reference<T>::type, ::boost::detail::int_convertible>::value; + }; +}; + +template <typename T> struct is_enum_impl +{ + //typedef ::boost::add_reference<T> ar_t; + //typedef typename ar_t::type r_type; + +#if defined(__GNUC__) + +#ifdef BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION + + // We MUST check for is_class_or_union on conforming compilers in + // order to correctly deduce that noncopyable types are not enums + // (dwa 2002/04/15)... + BOOST_STATIC_CONSTANT(bool, selector = + ::boost::is_arithmetic<T>::value + || ::boost::is_reference<T>::value + || ::boost::is_function<T>::value + || is_class_or_union<T>::value + || is_array<T>::value); +#else + // ...however, not checking is_class_or_union on non-conforming + // compilers prevents a dependency recursion. + BOOST_STATIC_CONSTANT(bool, selector = + ::boost::is_arithmetic<T>::value + || ::boost::is_reference<T>::value + || ::boost::is_function<T>::value + || is_array<T>::value); +#endif // BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION + +#else // !defined(__GNUC__): + + BOOST_STATIC_CONSTANT(bool, selector = + ::boost::is_arithmetic<T>::value + || ::boost::is_reference<T>::value + || is_class_or_union<T>::value + || is_array<T>::value); + +#endif + +#if BOOST_WORKAROUND(__BORLANDC__, < 0x600) + typedef ::boost::detail::is_enum_helper< + ::boost::detail::is_enum_impl<T>::selector + > se_t; +#else + typedef ::boost::detail::is_enum_helper<selector> se_t; +#endif + + typedef typename se_t::template type<T> helper; + BOOST_STATIC_CONSTANT(bool, value = helper::value); +}; + +} // namespace detail + +template <class T> struct is_enum : public integral_constant<bool, ::boost::detail::is_enum_impl<T>::value> {}; + +#else // __BORLANDC__ +// +// buggy is_convertible prevents working +// implementation of is_enum: +template <class T> struct is_enum : public integral_constant<bool, false> {}; + +#endif + +#else // BOOST_IS_ENUM + +template <class T> struct is_enum : public integral_constant<bool, BOOST_IS_ENUM(T)> {}; + +#endif + +} // namespace boost + +#endif // BOOST_TT_IS_ENUM_HPP_INCLUDED |