-// Copyright (C) 2000 John Maddock (john_maddock@compuserve.com)
+// 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).
//
-// Permission to copy and use this software is granted,
-// provided this copyright notice appears in all copies.
-// Permission to modify the code and to distribute modified code is granted,
-// provided this copyright notice appears in all copies, and a notice
-// that the code was modified is included with the copyright notice.
-//
-// This software is provided "as is" without express or implied warranty,
-// and with no claim as to its suitability for any purpose.
-
-#ifndef BOOST_FUNCTION_TYPE_TRAITS_HPP
-#define BOOST_FUNCTION_TYPE_TRAITS_HPP
-
-#ifndef BOOST_ICE_TYPE_TRAITS_HPP
-#include <boost/type_traits/ice.hpp>
-#endif
-#ifndef BOOST_FWD_TYPE_TRAITS_HPP
-#include <boost/type_traits/fwd.hpp>
-#endif
-#ifndef BOOST_COMPOSITE_TYPE_TRAITS_HPP
-#include <boost/type_traits/composite_traits.hpp>
-#endif
-//
-// is a type a function?
-//
-namespace boost{
-namespace detail{
+// 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 <class R>
-struct is_function_helper_base{ BOOST_STATIC_CONSTANT(bool, value = false); };
-template <class R>
-struct is_function_helper_base<R (*)(void)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0>
-struct is_function_helper_base<R (*)(A0)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1>
-struct is_function_helper_base<R (*)(A0, A1)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2>
-struct is_function_helper_base<R (*)(A0, A1, A2)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21, class A22>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21, class A22, class A23>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21, class A22, class A23, class A24>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21, class A22, class A23, class A24, class A25>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21, class A22, class A23, class A24, class A25, class A26>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21, class A22, class A23, class A24, class A25, class A26, class A27>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-template <class R, class A0, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10, class A11, class A12, class A13, class A14, class A15, class A16, class A17, class A18, class A19, class A20, class A21, class A22, class A23, class A24, class A25, class A26, class A27, class A28>
-struct is_function_helper_base<R (*)(A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28)>{ BOOST_STATIC_CONSTANT(bool, value = true); };
-
-template <class T>
-struct is_function_helper : is_function_helper_base<T*>{};
+template<typename Function> struct function_traits_helper;
-#else
+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 <class T>
-struct is_function_helper
+template<typename R, typename T1, typename T2>
+struct function_traits_helper<R (*)(T1, T2)>
{
- static T* t;
- BOOST_STATIC_CONSTANT(bool, value = sizeof(is_function_tester(t)) == sizeof(::boost::type_traits::yes_type));
+ 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;
};
-#endif
+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 <class T>
-struct is_function_ref_helper
+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(bool, value = false);
+ 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;
};
-#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
-template <class T, bool is_ref>
-struct is_function_chooser
+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)>
{
- typedef is_function_helper<T> type;
+ 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 <class T>
-struct is_function_chooser<T, true>
+
+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)>
{
- typedef is_function_ref_helper<T> type;
+ 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;
};
-#endif
-} // namespace detail
-template <class T>
-struct is_function
+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)>
{
-private:
-#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
- typedef typename detail::is_function_chooser<T, ::boost::is_reference<T>::value>::type m_type;
+ 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
- // without partial specialistaion we can't use is_reference on
- // function types, that leaves this template broken in the case that
- // T is a reference:
- typedef detail::is_function_helper<T> m_type;
-#endif
-public:
- BOOST_STATIC_CONSTANT(bool, value = m_type::value);
+
+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));
};
-} // boost
+#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+}
-#endif // BOOST_FUNCTION_TYPE_TRAITS_HPP
+#endif // BOOST_TT_FUNCTION_TRAITS_HPP_INCLUDED
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