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Add mp_transform_if, mp_map_update

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Peter Dimov
2017-03-14 16:32:17 +02:00
parent c054b2b2fe
commit 6fb4cee7b2
6 changed files with 143 additions and 3 deletions
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27
include/boost/mp11/algorithm.hpp
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@@ -1,7 +1,7 @@
#ifndef BOOST_MP11_ALGORITHM_HPP_INCLUDED
#define BOOST_MP11_ALGORITHM_HPP_INCLUDED
// Copyright 2015, 2016 Peter Dimov.
// Copyright 2015-2017 Peter Dimov.
//
// Distributed under the Boost Software License, Version 1.0.
//
@@ -69,6 +69,31 @@ template<template<class...> class F, template<class...> class L1, class... T1, t
template<template<class...> class F, class... L> using mp_transform = typename detail::mp_transform_impl<F, L...>::type;
// mp_transform_if<P, F, L>
namespace detail
{
template<template<class...> class P, template<class...> class F, class L> struct mp_transform_if_impl;
template<template<class...> class P, template<class...> class F, template<class...> class L, class... T> struct mp_transform_if_impl<P, F, L<T...>>
{
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1910 )
template<class U> struct _f { using type = mp_eval_if<mp_not<P<U>>, U, F, U>; };
using type = L<typename _f<T>::type...>;
#else
template<class U> using _f = mp_eval_if<mp_not<P<U>>, U, F, U>;
using type = L<_f<T>...>;
#endif
};
} // namespace detail
template<template<class...> class P, template<class...> class F, class L> using mp_transform_if = typename detail::mp_transform_if_impl<P, F, L>::type;
// mp_fill<L, V>
namespace detail
{