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Add mp_replace, mp_replace_if.

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This commit is contained in:
Peter Dimov
2015-06-23 16:26:56 +03:00
parent 4094f2f73f
commit 4a33810f9b
4 changed files with 165 additions and 2 deletions
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47
include/boost/mp11/algorithm.hpp
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@@ -309,6 +309,51 @@ template<class L, std::size_t N> using mp_take_c = typename detail::mp_take_impl
template<class L, class N> using mp_take = typename detail::mp_take_impl<L, N>::type;
// mp_replace<L, V, W>
namespace detail
{
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1800 )
template<class L, class V, class W> struct mp_replace_impl;
template<template<class...> class L, class... T, class V, class W> struct mp_replace_impl<L<T...>, V, W>
{
template<class A> struct _f { using type = mp_if<std::is_same<A, V>, W, A>; };
using type = L<typename _f<T>::type...>;
};
#else
template<class L, class V, class W> struct mp_replace_impl
{
template<class A> using _f = mp_if<std::is_same<A, V>, W, A>;
using type = mp_transform<_f, L>;
};
#endif
} // namespace detail
template<class L, class V, class W> using mp_replace = typename detail::mp_replace_impl<L, V, W>::type;
// mp_replace_if<L, P, W>
namespace detail
{
template<class L, template<class...> class P, class W> struct mp_replace_if_impl
{
template<class T> using _f = mp_if<P<T>, W, T>;
using type = mp_transform<_f, L>;
};
} // namespace detail
template<class L, template<class...> class P, class W> using mp_replace_if = typename detail::mp_replace_if_impl<L, P, W>::type;
// mp_find<L, V>
// mp_find_if<L, P>
// mp_find_index<L, V>
@@ -318,8 +363,6 @@ template<class L, class N> using mp_take = typename detail::mp_take_impl<L, N>::
// mp_remove_if<L, P>
// mp_fold<L, V, F>
// mp_reverse_fold<L, V, F>
// mp_replace<L, V1, V2>?
// mp_replace_if<L, P, V2>?
// mp_partition<L, P>
// mp_sort<L>