// Copyright 2000 John Maddock (john@johnmaddock.co.uk) | |
// 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_FUNCTION_TRAITS_HPP_INCLUDED | |
#define BOOST_TT_FUNCTION_TRAITS_HPP_INCLUDED | |
#include <boost/config.hpp> | |
#include <boost/type_traits/is_function.hpp> | |
#include <boost/type_traits/add_pointer.hpp> | |
namespace boost { | |
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION | |
namespace detail { | |
template<typename Function> struct function_traits_helper; | |
template<typename R> | |
struct function_traits_helper<R (*)(void)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 0); | |
typedef R result_type; | |
}; | |
template<typename R, typename T1> | |
struct function_traits_helper<R (*)(T1)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 1); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T1 argument_type; | |
}; | |
template<typename R, typename T1, typename T2> | |
struct function_traits_helper<R (*)(T1, T2)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 2); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T1 first_argument_type; | |
typedef T2 second_argument_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3> | |
struct function_traits_helper<R (*)(T1, T2, T3)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 3); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3, typename T4> | |
struct function_traits_helper<R (*)(T1, T2, T3, T4)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 4); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
typedef T4 arg4_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5> | |
struct function_traits_helper<R (*)(T1, T2, T3, T4, T5)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 5); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
typedef T4 arg4_type; | |
typedef T5 arg5_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6> | |
struct function_traits_helper<R (*)(T1, T2, T3, T4, T5, T6)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 6); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
typedef T4 arg4_type; | |
typedef T5 arg5_type; | |
typedef T6 arg6_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7> | |
struct function_traits_helper<R (*)(T1, T2, T3, T4, T5, T6, T7)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 7); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
typedef T4 arg4_type; | |
typedef T5 arg5_type; | |
typedef T6 arg6_type; | |
typedef T7 arg7_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7, typename T8> | |
struct function_traits_helper<R (*)(T1, T2, T3, T4, T5, T6, T7, T8)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 8); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
typedef T4 arg4_type; | |
typedef T5 arg5_type; | |
typedef T6 arg6_type; | |
typedef T7 arg7_type; | |
typedef T8 arg8_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7, typename T8, typename T9> | |
struct function_traits_helper<R (*)(T1, T2, T3, T4, T5, T6, T7, T8, T9)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 9); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
typedef T4 arg4_type; | |
typedef T5 arg5_type; | |
typedef T6 arg6_type; | |
typedef T7 arg7_type; | |
typedef T8 arg8_type; | |
typedef T9 arg9_type; | |
}; | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7, typename T8, typename T9, | |
typename T10> | |
struct function_traits_helper<R (*)(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)> | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = 10); | |
typedef R result_type; | |
typedef T1 arg1_type; | |
typedef T2 arg2_type; | |
typedef T3 arg3_type; | |
typedef T4 arg4_type; | |
typedef T5 arg5_type; | |
typedef T6 arg6_type; | |
typedef T7 arg7_type; | |
typedef T8 arg8_type; | |
typedef T9 arg9_type; | |
typedef T10 arg10_type; | |
}; | |
} // end namespace detail | |
template<typename Function> | |
struct function_traits : | |
public boost::detail::function_traits_helper<typename boost::add_pointer<Function>::type> | |
{ | |
}; | |
#else | |
namespace detail { | |
template<unsigned N> | |
struct type_of_size | |
{ | |
char elements[N]; | |
}; | |
template<typename R> | |
type_of_size<1> function_arity_helper(R (*f)()); | |
template<typename R, typename T1> | |
type_of_size<2> function_arity_helper(R (*f)(T1)); | |
template<typename R, typename T1, typename T2> | |
type_of_size<3> function_arity_helper(R (*f)(T1, T2)); | |
template<typename R, typename T1, typename T2, typename T3> | |
type_of_size<4> function_arity_helper(R (*f)(T1, T2, T3)); | |
template<typename R, typename T1, typename T2, typename T3, typename T4> | |
type_of_size<5> function_arity_helper(R (*f)(T1, T2, T3, T4)); | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5> | |
type_of_size<6> function_arity_helper(R (*f)(T1, T2, T3, T4, T5)); | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6> | |
type_of_size<7> function_arity_helper(R (*f)(T1, T2, T3, T4, T5, T6)); | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7> | |
type_of_size<8> function_arity_helper(R (*f)(T1, T2, T3, T4, T5, T6, T7)); | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7, typename T8> | |
type_of_size<9> function_arity_helper(R (*f)(T1, T2, T3, T4, T5, T6, T7, T8)); | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7, typename T8, typename T9> | |
type_of_size<10> function_arity_helper(R (*f)(T1, T2, T3, T4, T5, T6, T7, T8, | |
T9)); | |
template<typename R, typename T1, typename T2, typename T3, typename T4, | |
typename T5, typename T6, typename T7, typename T8, typename T9, | |
typename T10> | |
type_of_size<11> function_arity_helper(R (*f)(T1, T2, T3, T4, T5, T6, T7, T8, | |
T9, T10)); | |
} // end namespace detail | |
// Won't work with references | |
template<typename Function> | |
struct function_traits | |
{ | |
BOOST_STATIC_CONSTANT(unsigned, arity = (sizeof(boost::detail::function_arity_helper((Function*)0))-1)); | |
}; | |
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION | |
} | |
#endif // BOOST_TT_FUNCTION_TRAITS_HPP_INCLUDED |