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Add mp_map_erase.

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This commit is contained in:
Peter Dimov
2017-03-14 02:56:32 +02:00
parent 5f81bd18d4
commit c054b2b2fe
3 changed files with 76 additions and 1 deletions
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13
include/boost/mp11/map.hpp
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@@ -46,7 +46,20 @@ template<template<class...> class M, class... U, class T> struct mp_map_replace_
template<class M, class T> using mp_map_replace = typename detail::mp_map_replace_impl<M, T>::type;
// mp_map_update<M, T, F>
// mp_map_erase<M, K>
namespace detail
{
template<class M, class K> struct mp_map_erase_impl
{
template<class T> using _f = std::is_same<mp_first<T>, K>;
using type = mp_remove_if<M, _f>;
};
} // namespace detail
template<class M, class K> using mp_map_erase = typename detail::mp_map_erase_impl<M, K>::type;
} // namespace boost

3
test/Jamfile.v2
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@@ -1,6 +1,6 @@
# Boost.Mp11 Library Test Jamfile
#
# Copyright 2015 Peter Dimov
# Copyright 2015-2017 Peter Dimov
#
# Distributed under the Boost Software License, Version 1.0.
# See accompanying file LICENSE_1_0.txt or copy at
@@ -94,3 +94,4 @@ run mp_map_find.cpp : : : $(REQ) ;
run mp_map_contains.cpp : : : $(REQ) ;
run mp_map_insert.cpp : : : $(REQ) ;
run mp_map_replace.cpp : : : $(REQ) ;
run mp_map_erase.cpp : : : $(REQ) ;

61
test/mp_map_erase.cpp Normal file
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@@ -0,0 +1,61 @@
// Copyright 2016, 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/map.hpp>
#include <boost/mp11/list.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#include <tuple>
#include <utility>
int main()
{
using boost::mp_map_erase;
using boost::mp_list;
using boost::mp_push_back;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<mp_list<>, void>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<std::tuple<>, int>, std::tuple<>>));
{
using M = mp_list<std::pair<int, int const>, std::pair<long, long const>>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, char>, M>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, int>, mp_list<std::pair<long, long const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, long>, mp_list<std::pair<int, int const>>>));
}
{
using M = std::tuple<std::pair<int, int const>, std::pair<long, long const>>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, char>, M>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, int>, std::tuple<std::pair<long, long const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, long>, std::tuple<std::pair<int, int const>>>));
}
{
using M = mp_list<mp_list<int>, mp_list<long, long>, mp_list<long long, long long, long long>>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, char>, M>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, int>, mp_list<mp_list<long, long>, mp_list<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, long>, mp_list<mp_list<int>, mp_list<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, long long>, mp_list<mp_list<int>, mp_list<long, long>>>));
}
{
using M = std::tuple<mp_list<int>, std::pair<long, long>, std::tuple<long long, long long, long long>>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, char>, M>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, int>, std::tuple<std::pair<long, long>, std::tuple<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, long>, std::tuple<mp_list<int>, std::tuple<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_erase<M, long long>, std::tuple<mp_list<int>, std::pair<long, long>>>));
}
return boost::report_errors();
}