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function_traits.hpp

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[SVN r14670]
This commit is contained in:
Douglas Gregor
2002-08-05 01:57:33 +00:00
parent 7be10f011f
commit b8b462622b
1 changed files with 152 additions and 0 deletions
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152
include/boost/type_traits/function_traits.hpp
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@ -148,6 +148,158 @@ public:
BOOST_STATIC_CONSTANT(bool, value = m_type::value);
};
#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(int, arity = 0);
typedef R result_type;
};
template<typename R, typename T1>
struct function_traits_helper<R (*)(T1)>
{
BOOST_STATIC_CONSTANT(int, arity = 1);
typedef R result_type;
typedef T1 arg1_type;
};
template<typename R, typename T1, typename T2>
struct function_traits_helper<R (*)(T1, T2)>
{
BOOST_STATIC_CONSTANT(int, arity = 2);
typedef R result_type;
typedef T1 arg1_type;
typedef T2 arg2_type;
};
template<typename R, typename T1, typename T2, typename T3>
struct function_traits_helper<R (*)(T1, T2, T3)>
{
BOOST_STATIC_CONSTANT(int, 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(int, 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(int, 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(int, 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(int, 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(int, 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(int, 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(int, 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 detail::function_traits_helper<typename add_pointer<Function>::type>
{
};
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
} // boost
#endif // BOOST_FUNCTION_TYPE_TRAITS_HPP