forked from boostorg/mp11
247 lines
6.3 KiB
C++
247 lines
6.3 KiB
C++
#ifndef BOOST_MP11_LIST_HPP_INCLUDED
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#define BOOST_MP11_LIST_HPP_INCLUDED
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// Copyright 2015-2017 Peter Dimov.
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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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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#include <boost/mp11/integral.hpp>
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#include <boost/mp11/detail/mp_list.hpp>
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#include <boost/mp11/detail/mp_append.hpp>
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#include <boost/config.hpp>
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#include <boost/detail/workaround.hpp>
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namespace boost
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{
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namespace mp11
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{
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// mp_size<L>
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namespace detail
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{
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template<class L> struct mp_size_impl
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{
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// An error "no type named 'type'" here means that the argument to mp_size is not a list
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};
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template<template<class...> class L, class... T> struct mp_size_impl<L<T...>>
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{
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using type = mp_size_t<sizeof...(T)>;
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};
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} // namespace detail
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template<class L> using mp_size = typename detail::mp_size_impl<L>::type;
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// mp_empty<L>
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template<class L> using mp_empty = mp_bool< mp_size<L>::value == 0 >;
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// mp_front<L>
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namespace detail
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{
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template<class L> struct mp_front_impl
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{
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// An error "no type named 'type'" here means that the argument to mp_front
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// is either not a list, or is an empty list
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};
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template<template<class...> class L, class T1, class... T> struct mp_front_impl<L<T1, T...>>
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{
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using type = T1;
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};
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} // namespace detail
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template<class L> using mp_front = typename detail::mp_front_impl<L>::type;
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// mp_pop_front<L>
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namespace detail
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{
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template<class L> struct mp_pop_front_impl
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{
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// An error "no type named 'type'" here means that the argument to mp_pop_front
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// is either not a list, or is an empty list
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};
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template<template<class...> class L, class T1, class... T> struct mp_pop_front_impl<L<T1, T...>>
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{
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using type = L<T...>;
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};
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} // namespace detail
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template<class L> using mp_pop_front = typename detail::mp_pop_front_impl<L>::type;
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// mp_first<L>
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template<class L> using mp_first = mp_front<L>;
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// mp_rest<L>
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template<class L> using mp_rest = mp_pop_front<L>;
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// mp_second<L>
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namespace detail
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{
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template<class L> struct mp_second_impl
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{
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// An error "no type named 'type'" here means that the argument to mp_second
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// is either not a list, or has fewer than two elements
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};
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template<template<class...> class L, class T1, class T2, class... T> struct mp_second_impl<L<T1, T2, T...>>
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{
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using type = T2;
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};
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} // namespace detail
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template<class L> using mp_second = typename detail::mp_second_impl<L>::type;
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// mp_third<L>
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namespace detail
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{
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template<class L> struct mp_third_impl
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{
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// An error "no type named 'type'" here means that the argument to mp_third
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// is either not a list, or has fewer than three elements
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};
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template<template<class...> class L, class T1, class T2, class T3, class... T> struct mp_third_impl<L<T1, T2, T3, T...>>
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{
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using type = T3;
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};
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} // namespace detail
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template<class L> using mp_third = typename detail::mp_third_impl<L>::type;
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// mp_push_front<L, T...>
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namespace detail
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{
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template<class L, class... T> struct mp_push_front_impl
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{
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// An error "no type named 'type'" here means that the first argument to mp_push_front is not a list
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};
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template<template<class...> class L, class... U, class... T> struct mp_push_front_impl<L<U...>, T...>
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{
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using type = L<T..., U...>;
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};
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} // namespace detail
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template<class L, class... T> using mp_push_front = typename detail::mp_push_front_impl<L, T...>::type;
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// mp_push_back<L, T...>
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namespace detail
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{
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template<class L, class... T> struct mp_push_back_impl
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{
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// An error "no type named 'type'" here means that the first argument to mp_push_back is not a list
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};
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template<template<class...> class L, class... U, class... T> struct mp_push_back_impl<L<U...>, T...>
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{
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using type = L<U..., T...>;
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};
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} // namespace detail
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template<class L, class... T> using mp_push_back = typename detail::mp_push_back_impl<L, T...>::type;
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// mp_rename<L, B>
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namespace detail
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{
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template<class A, template<class...> class B> struct mp_rename_impl
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{
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// An error "no type named 'type'" here means that the first argument to mp_rename is not a list
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};
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template<template<class...> class A, class... T, template<class...> class B> struct mp_rename_impl<A<T...>, B>
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{
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using type = B<T...>;
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};
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} // namespace detail
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template<class A, template<class...> class B> using mp_rename = typename detail::mp_rename_impl<A, B>::type;
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template<template<class...> class F, class L> using mp_apply = typename detail::mp_rename_impl<L, F>::type;
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template<class Q, class L> using mp_apply_q = typename detail::mp_rename_impl<L, Q::template fn>::type;
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// mp_replace_front<L, T>
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namespace detail
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{
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template<class L, class T> struct mp_replace_front_impl
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{
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// An error "no type named 'type'" here means that the first argument to mp_replace_front
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// is either not a list, or is an empty list
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};
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template<template<class...> class L, class U1, class... U, class T> struct mp_replace_front_impl<L<U1, U...>, T>
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{
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using type = L<T, U...>;
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};
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} // namespace detail
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template<class L, class T> using mp_replace_front = typename detail::mp_replace_front_impl<L, T>::type;
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// mp_replace_first<L, T>
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template<class L, class T> using mp_replace_first = typename detail::mp_replace_front_impl<L, T>::type;
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// mp_replace_second<L, T>
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namespace detail
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{
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template<class L, class T> struct mp_replace_second_impl
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{
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// An error "no type named 'type'" here means that the first argument to mp_replace_second
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// is either not a list, or has fewer than two elements
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};
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template<template<class...> class L, class U1, class U2, class... U, class T> struct mp_replace_second_impl<L<U1, U2, U...>, T>
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{
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using type = L<U1, T, U...>;
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};
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} // namespace detail
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template<class L, class T> using mp_replace_second = typename detail::mp_replace_second_impl<L, T>::type;
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// mp_replace_third<L, T>
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namespace detail
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{
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template<class L, class T> struct mp_replace_third_impl
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{
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// An error "no type named 'type'" here means that the first argument to mp_replace_third
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// is either not a list, or has fewer than three elements
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};
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template<template<class...> class L, class U1, class U2, class U3, class... U, class T> struct mp_replace_third_impl<L<U1, U2, U3, U...>, T>
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{
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using type = L<U1, U2, T, U...>;
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};
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} // namespace detail
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template<class L, class T> using mp_replace_third = typename detail::mp_replace_third_impl<L, T>::type;
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} // namespace mp11
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} // namespace boost
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#endif // #ifndef BOOST_MP11_LIST_HPP_INCLUDED
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