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Diffstat (limited to 'contrib/src/boost/utility/result_of.hpp')
-rw-r--r-- | contrib/src/boost/utility/result_of.hpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/contrib/src/boost/utility/result_of.hpp b/contrib/src/boost/utility/result_of.hpp new file mode 100644 index 0000000..206ae30 --- /dev/null +++ b/contrib/src/boost/utility/result_of.hpp @@ -0,0 +1,210 @@ +// Boost result_of library + +// Copyright Douglas Gregor 2004. Use, modification and +// distribution is 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) + +// For more information, see http://www.boost.org/libs/utility +#ifndef BOOST_RESULT_OF_HPP +#define BOOST_RESULT_OF_HPP + +#include <boost/config.hpp> +#include <boost/preprocessor/cat.hpp> +#include <boost/preprocessor/iteration/iterate.hpp> +#include <boost/preprocessor/repetition/enum_params.hpp> +#include <boost/preprocessor/repetition/enum_trailing_params.hpp> +#include <boost/preprocessor/repetition/enum_binary_params.hpp> +#include <boost/preprocessor/repetition/enum_shifted_params.hpp> +#include <boost/preprocessor/facilities/intercept.hpp> +#include <boost/detail/workaround.hpp> +#include <boost/mpl/has_xxx.hpp> +#include <boost/mpl/if.hpp> +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/bool.hpp> +#include <boost/mpl/identity.hpp> +#include <boost/mpl/or.hpp> +#include <boost/type_traits/is_class.hpp> +#include <boost/type_traits/is_pointer.hpp> +#include <boost/type_traits/is_member_function_pointer.hpp> +#include <boost/type_traits/remove_cv.hpp> +#include <boost/type_traits/remove_reference.hpp> +#include <boost/utility/declval.hpp> +#include <boost/utility/enable_if.hpp> + +#ifndef BOOST_RESULT_OF_NUM_ARGS +# define BOOST_RESULT_OF_NUM_ARGS 16 +#endif + +// Use the decltype-based version of result_of by default if the compiler +// supports N3276 <http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2011/n3276.pdf>. +// The user can force the choice by defining BOOST_RESULT_OF_USE_DECLTYPE, +// BOOST_RESULT_OF_USE_TR1, or BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK but not more than one! +#if (defined(BOOST_RESULT_OF_USE_DECLTYPE) && defined(BOOST_RESULT_OF_USE_TR1)) || \ + (defined(BOOST_RESULT_OF_USE_DECLTYPE) && defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)) || \ + (defined(BOOST_RESULT_OF_USE_TR1) && defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)) +# error More than one of BOOST_RESULT_OF_USE_DECLTYPE, BOOST_RESULT_OF_USE_TR1 and \ + BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK cannot be defined at the same time. +#endif + +#if defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK) && defined(BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE) +# error Cannot fallback to decltype if BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE is not defined. +#endif + +#ifndef BOOST_RESULT_OF_USE_TR1 +# ifndef BOOST_RESULT_OF_USE_DECLTYPE +# ifndef BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK +# ifndef BOOST_NO_CXX11_DECLTYPE_N3276 // this implies !defined(BOOST_NO_CXX11_DECLTYPE) +# define BOOST_RESULT_OF_USE_DECLTYPE +# else +# define BOOST_RESULT_OF_USE_TR1 +# endif +# endif +# endif +#endif + +namespace boost { + +template<typename F> struct result_of; +template<typename F> struct tr1_result_of; // a TR1-style implementation of result_of + +#if !defined(BOOST_NO_SFINAE) +namespace detail { + +BOOST_MPL_HAS_XXX_TRAIT_DEF(result_type) + +// Work around a nvcc bug by only defining has_result when it's needed. +#ifdef BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK +BOOST_MPL_HAS_XXX_TEMPLATE_DEF(result) +#endif + +template<typename F, typename FArgs, bool HasResultType> struct tr1_result_of_impl; + +template<typename F> struct cpp0x_result_of; + +#ifdef BOOST_NO_SFINAE_EXPR + +// There doesn't seem to be any other way to turn this off such that the presence of +// the user-defined operator,() below doesn't cause spurious warning all over the place, +// so unconditionally turn it off. +#if BOOST_MSVC +# pragma warning(disable: 4913) // user defined binary operator ',' exists but no overload could convert all operands, default built-in binary operator ',' used +#endif + +struct result_of_private_type {}; + +struct result_of_weird_type { + friend result_of_private_type operator,(result_of_private_type, result_of_weird_type); +}; + +typedef char result_of_yes_type; // sizeof(result_of_yes_type) == 1 +typedef char (&result_of_no_type)[2]; // sizeof(result_of_no_type) == 2 + +template<typename T> +result_of_no_type result_of_is_private_type(T const &); +result_of_yes_type result_of_is_private_type(result_of_private_type); + +template<typename C> +struct result_of_callable_class : C { + result_of_callable_class(); + typedef result_of_private_type const &(*pfn_t)(...); + operator pfn_t() const volatile; +}; + +template<typename C> +struct result_of_wrap_callable_class { + typedef result_of_callable_class<C> type; +}; + +template<typename C> +struct result_of_wrap_callable_class<C const> { + typedef result_of_callable_class<C> const type; +}; + +template<typename C> +struct result_of_wrap_callable_class<C volatile> { + typedef result_of_callable_class<C> volatile type; +}; + +template<typename C> +struct result_of_wrap_callable_class<C const volatile> { + typedef result_of_callable_class<C> const volatile type; +}; + +template<typename C> +struct result_of_wrap_callable_class<C &> { + typedef typename result_of_wrap_callable_class<C>::type &type; +}; + +template<typename F, bool TestCallability = true> struct cpp0x_result_of_impl; + +#else // BOOST_NO_SFINAE_EXPR + +template<typename T> +struct result_of_always_void +{ + typedef void type; +}; + +template<typename F, typename Enable = void> struct cpp0x_result_of_impl {}; + +#endif // BOOST_NO_SFINAE_EXPR + +template<typename F> +struct result_of_void_impl +{ + typedef void type; +}; + +template<typename R> +struct result_of_void_impl<R (*)(void)> +{ + typedef R type; +}; + +template<typename R> +struct result_of_void_impl<R (&)(void)> +{ + typedef R type; +}; + +// Determine the return type of a function pointer or pointer to member. +template<typename F, typename FArgs> +struct result_of_pointer + : tr1_result_of_impl<typename remove_cv<F>::type, FArgs, false> { }; + +template<typename F, typename FArgs> +struct tr1_result_of_impl<F, FArgs, true> +{ + typedef typename F::result_type type; +}; + +template<typename FArgs> +struct is_function_with_no_args : mpl::false_ {}; + +template<typename F> +struct is_function_with_no_args<F(void)> : mpl::true_ {}; + +template<typename F, typename FArgs> +struct result_of_nested_result : F::template result<FArgs> +{}; + +template<typename F, typename FArgs> +struct tr1_result_of_impl<F, FArgs, false> + : mpl::if_<is_function_with_no_args<FArgs>, + result_of_void_impl<F>, + result_of_nested_result<F, FArgs> >::type +{}; + +} // end namespace detail + +#define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_RESULT_OF_NUM_ARGS,<boost/utility/detail/result_of_iterate.hpp>)) +#include BOOST_PP_ITERATE() + +#else +# define BOOST_NO_RESULT_OF 1 +#endif + +} + +#endif // BOOST_RESULT_OF_HPP |