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Move mp_fold to detail/mp_fold.hpp

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Peter Dimov
2017-10-15 14:33:50 +03:00
parent 87eb350ec4
commit ea68803092
2 changed files with 67 additions and 44 deletions
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46
include/boost/mp11/algorithm.hpp
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@@ -17,6 +17,7 @@
#include <boost/mp11/detail/mp_plus.hpp>
#include <boost/mp11/detail/mp_map_find.hpp>
#include <boost/mp11/detail/mp_with_index.hpp>
#include <boost/mp11/detail/mp_fold.hpp>
#include <boost/mp11/detail/config.hpp>
#include <boost/mp11/integer_sequence.hpp>
#include <boost/config.hpp>
@@ -29,17 +30,6 @@ namespace boost
namespace mp11
{
// mp_fold<L, V, F> forward declaration
namespace detail
{
template<class L, class V, template<class...> class F> struct mp_fold_impl;
} // namespace detail
template<class L, class V, template<class...> class F> using mp_fold = typename detail::mp_fold_impl<L, V, F>::type;
template<class L, class V, class Q> using mp_fold_q = mp_fold<L, V, Q::template fn>;
// mp_transform<F, L...>
namespace detail
{
@@ -767,39 +757,7 @@ template<template<class...> class L, class T1, class T2, class T3, class T4, cla
template<class L> using mp_reverse = typename detail::mp_reverse_impl<L>::type;
// mp_fold<L, V, F>
namespace detail
{
template<class L, class V, template<class...> class F> struct mp_fold_impl;
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1800 )
template<template<class...> class L, class... T, class V, template<class...> class F> struct mp_fold_impl<L<T...>, V, F>
{
static_assert( sizeof...(T) == 0, "T... must be empty" );
using type = V;
};
#else
template<template<class...> class L, class V, template<class...> class F> struct mp_fold_impl<L<>, V, F>
{
using type = V;
};
#endif
template<template<class...> class L, class T1, class... T, class V, template<class...> class F> struct mp_fold_impl<L<T1, T...>, V, F>
{
using type = typename mp_fold_impl<L<T...>, F<V, T1>, F>::type;
};
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class... T, class V, template<class...> class F> struct mp_fold_impl<L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T...>, V, F>
{
using type = typename mp_fold_impl<L<T...>, F<F<F<F<F<F<F<F<F<F<V, T1>, T2>, T3>, T4>, T5>, T6>, T7>, T8>, T9>, T10>, F>::type;
};
} // namespace detail
// in detail/mp_fold.hpp
// mp_reverse_fold<L, V, F>
namespace detail

65
include/boost/mp11/detail/mp_fold.hpp Normal file
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@@ -0,0 +1,65 @@
#ifndef BOOST_MP11_DETAIL_MP_FOLD_HPP_INCLUDED
#define BOOST_MP11_DETAIL_MP_FOLD_HPP_INCLUDED
// Copyright 2015-2017 Peter Dimov.
//
// Distributed under 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
#include <boost/mp11/integral.hpp>
#include <boost/mp11/detail/mp_plus.hpp>
#include <boost/mp11/detail/config.hpp>
#include <boost/config.hpp>
namespace boost
{
namespace mp11
{
// mp_fold<L, V, F>
namespace detail
{
template<class L, class V, template<class...> class F> struct mp_fold_impl
{
// An error "no type named 'type'" here means that the first argument to mp_fold is not a list
};
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1800 )
template<template<class...> class L, class... T, class V, template<class...> class F> struct mp_fold_impl<L<T...>, V, F>
{
static_assert( sizeof...(T) == 0, "T... must be empty" );
using type = V;
};
#else
template<template<class...> class L, class V, template<class...> class F> struct mp_fold_impl<L<>, V, F>
{
using type = V;
};
#endif
template<template<class...> class L, class T1, class... T, class V, template<class...> class F> struct mp_fold_impl<L<T1, T...>, V, F>
{
using type = typename mp_fold_impl<L<T...>, F<V, T1>, F>::type;
};
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class... T, class V, template<class...> class F> struct mp_fold_impl<L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T...>, V, F>
{
using type = typename mp_fold_impl<L<T...>, F<F<F<F<F<F<F<F<F<F<V, T1>, T2>, T3>, T4>, T5>, T6>, T7>, T8>, T9>, T10>, F>::type;
};
} // namespace detail
template<class L, class V, template<class...> class F> using mp_fold = typename detail::mp_fold_impl<L, V, F>::type;
template<class L, class V, class Q> using mp_fold_q = mp_fold<L, V, Q::template fn>;
} // namespace mp11
} // namespace boost
#endif // #ifndef BOOST_MP11_DETAIL_MP_FOLD_HPP_INCLUDED