mirror of
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98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
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// Copyright Aleksey Gurtovoy 2001-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (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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// *Preprocessed* version of the main "template_arity.hpp" header
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// -- DO NOT modify by hand!
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namespace boost { namespace mpl { namespace aux {
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template< int N > struct arity_tag
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{
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typedef char (&type)[N + 1];
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};
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template<
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int C1, int C2, int C3, int C4, int C5, int C6
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>
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struct max_arity
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{
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BOOST_STATIC_CONSTANT(int, value =
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( C6 > 0 ? C6 : ( C5 > 0 ? C5 : ( C4 > 0 ? C4 : ( C3 > 0 ? C3 : ( C2 > 0 ? C2 : ( C1 > 0 ? C1 : -1 ) ) ) ) ) )
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);
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};
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arity_tag<0>::type arity_helper(...);
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template<
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template< typename P1 > class F
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, typename T1
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>
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typename arity_tag<1>::type
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arity_helper(type_wrapper< F<T1> >, arity_tag<1>);
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template<
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template< typename P1, typename P2 > class F
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, typename T1, typename T2
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>
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typename arity_tag<2>::type
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arity_helper(type_wrapper< F< T1,T2 > >, arity_tag<2>);
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template<
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template< typename P1, typename P2, typename P3 > class F
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, typename T1, typename T2, typename T3
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>
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typename arity_tag<3>::type
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arity_helper(type_wrapper< F< T1,T2,T3 > >, arity_tag<3>);
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template<
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template< typename P1, typename P2, typename P3, typename P4 > class F
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, typename T1, typename T2, typename T3, typename T4
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>
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typename arity_tag<4>::type
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arity_helper(type_wrapper< F< T1,T2,T3,T4 > >, arity_tag<4>);
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template<
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template<
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typename P1, typename P2, typename P3, typename P4
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, typename P5
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>
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class F
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, typename T1, typename T2, typename T3, typename T4, typename T5
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>
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typename arity_tag<5>::type
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arity_helper(type_wrapper< F< T1,T2,T3,T4,T5 > >, arity_tag<5>);
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template<
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template<
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typename P1, typename P2, typename P3, typename P4
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, typename P5, typename P6
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>
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class F
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, typename T1, typename T2, typename T3, typename T4, typename T5
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, typename T6
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>
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typename arity_tag<6>::type
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arity_helper(type_wrapper< F< T1,T2,T3,T4,T5,T6 > >, arity_tag<6>);
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template< typename F, int N >
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struct template_arity_impl
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{
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BOOST_STATIC_CONSTANT(int, value =
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sizeof(::boost::mpl::aux::arity_helper(type_wrapper<F>(), arity_tag<N>())) - 1
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);
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};
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template< typename F >
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struct template_arity
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{
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BOOST_STATIC_CONSTANT(int, value = (
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max_arity< template_arity_impl< F,1 >::value, template_arity_impl< F,2 >::value, template_arity_impl< F,3 >::value, template_arity_impl< F,4 >::value, template_arity_impl< F,5 >::value, template_arity_impl< F,6 >::value >::value
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));
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typedef mpl::int_<value> type;
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};
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}}}
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