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// Copyright 2000 John Maddock (john@johnmaddock.co.uk)
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// Copyright 2002 Aleksey Gurtovoy (agurtovoy@meta-comm.com)
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//
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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//
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// See http://www.boost.org/libs/type_traits for most recent version including documentation.
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#ifndef BOOST_TT_IS_FUNCTION_CXX_03_HPP_INCLUDED
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#define BOOST_TT_IS_FUNCTION_CXX_03_HPP_INCLUDED
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#include <boost/type_traits/is_reference.hpp>
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#if !defined(BOOST_TT_TEST_MS_FUNC_SIGS)
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# include <boost/type_traits/detail/is_function_ptr_helper.hpp>
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#else
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# include <boost/type_traits/detail/is_function_ptr_tester.hpp>
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# include <boost/type_traits/detail/yes_no_type.hpp>
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#endif
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// is a type a function?
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// Please note that this implementation is unnecessarily complex:
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// we could just use !is_convertible<T*, const volatile void*>::value,
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// except that some compilers erroneously allow conversions from
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// function pointers to void*.
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namespace boost {
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#if !defined( BOOST_CODEGEARC )
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namespace detail {
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#if !defined(BOOST_TT_TEST_MS_FUNC_SIGS)
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template<bool is_ref = true>
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struct is_function_chooser
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{
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template< typename T > struct result_
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: public false_type {};
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};
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template <>
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struct is_function_chooser<false>
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{
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template< typename T > struct result_
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: public ::boost::type_traits::is_function_ptr_helper<T*> {};
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};
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template <typename T>
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struct is_function_impl
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: public is_function_chooser< ::boost::is_reference<T>::value >
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::BOOST_NESTED_TEMPLATE result_<T>
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{
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};
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#else
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template <typename T>
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struct is_function_impl
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{
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#if BOOST_WORKAROUND(BOOST_MSVC_FULL_VER, >= 140050000)
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#pragma warning(push)
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#pragma warning(disable:6334)
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#endif
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static T* t;
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BOOST_STATIC_CONSTANT(
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bool, value = sizeof(::boost::type_traits::is_function_ptr_tester(t))
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== sizeof(::boost::type_traits::yes_type)
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);
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#if BOOST_WORKAROUND(BOOST_MSVC_FULL_VER, >= 140050000)
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#pragma warning(pop)
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#endif
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};
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template <typename T>
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struct is_function_impl<T&> : public false_type
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{};
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#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
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template <typename T>
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struct is_function_impl<T&&> : public false_type
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{};
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#endif
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#endif
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} // namespace detail
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#endif // !defined( BOOST_CODEGEARC )
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#if defined( BOOST_CODEGEARC )
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template <class T> struct is_function : integral_constant<bool, __is_function(T)> {};
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#else
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template <class T> struct is_function : integral_constant<bool, ::boost::detail::is_function_impl<T>::value> {};
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#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
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template <class T> struct is_function<T&&> : public false_type {};
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#endif
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#if !BOOST_WORKAROUND(BOOST_MSVC, <= 1600)
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template <class T> struct is_function<T&> : public false_type {};
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#endif
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#endif
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} // namespace boost
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, <= 1700)
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#include <boost/type_traits/detail/is_function_msvc10_fix.hpp>
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#endif
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#endif // BOOST_TT_IS_FUNCTION_CXX_03_HPP_INCLUDED
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