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Add mp_map_replace.

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This commit is contained in:
Peter Dimov
2016-11-17 03:38:24 +02:00
parent 4a7008562f
commit 42405ac701
5 changed files with 89 additions and 3 deletions
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2
include/boost/mp11/algorithm.hpp
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@@ -48,8 +48,6 @@ namespace detail
template<template<class...> class F, class... L> struct mp_transform_impl;
template<template<class...> class F, class... L> using mp_transform = typename mp_transform_impl<F, L...>::type;
template<template<class...> class F, template<class...> class L, class... T> struct mp_transform_impl<F, L<T...>>
{
using type = L<F<T>...>;

21
include/boost/mp11/map.hpp
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@@ -12,6 +12,7 @@
#include <boost/mp11/list.hpp>
#include <boost/mp11/integral.hpp>
#include <boost/mp11/utility.hpp>
#include <boost/mp11/algorithm.hpp>
#include <type_traits>
namespace boost
@@ -24,6 +25,26 @@ template<class M, class K> using mp_map_contains = mp_not<std::is_same<mp_map_fi
template<class M, class T> using mp_map_insert = mp_if< mp_map_contains<M, mp_first<T>>, M, mp_push_back<M, T> >;
// mp_map_replace<M, T>
namespace detail
{
template<class M, class T> struct mp_map_replace_impl;
template<template<class...> class M, class... U, class T> struct mp_map_replace_impl<M<U...>, T>
{
using K = mp_first<T>;
// mp_replace_if is inlined here using a struct _f because of msvc-14.0
template<class V> struct _f { using type = mp_if< std::is_same<mp_first<V>, K>, T, V >; };
using type = mp_if< mp_map_contains<M<U...>, K>, M<typename _f<U>::type...>, M<U..., T> >;
};
} // namespace detail
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>

1
test/Jamfile.v2
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@@ -93,3 +93,4 @@ run mp_or.cpp : : : $(REQ) ;
run mp_map_find.cpp : : : $(REQ) ;
run mp_map_contains.cpp : : : $(REQ) ;
run mp_map_insert.cpp : : : $(REQ) ;
run mp_map_replace.cpp : : : $(REQ) ;

2
test/mp_map_insert.cpp
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@@ -53,7 +53,7 @@ int main()
}
{
using M = mp_list<mp_list<int>, std::pair<long, long>, std::tuple<long long, long long, 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_insert<M, mp_list<char>>, mp_push_back<M, mp_list<char>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_insert<M, std::pair<char, char const>>, mp_push_back<M, std::pair<char, char const>>>));

66
test/mp_map_replace.cpp Normal file
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@@ -0,0 +1,66 @@
// Copyright 2016 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_replace;
using boost::mp_list;
using boost::mp_push_back;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<mp_list<>, mp_list<void>>, mp_list<mp_list<void>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<std::tuple<>, std::tuple<int>>, std::tuple<std::tuple<int>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<std::tuple<>, std::pair<int, float>>, std::tuple<std::pair<int, float>>>));
{
using M = mp_list<std::pair<int, int const>, std::pair<long, long const>>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, mp_list<char>>, mp_push_back<M, mp_list<char>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<char, char const>>, mp_push_back<M, std::pair<char, char const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, mp_list<int>>, mp_list<mp_list<int>, std::pair<long, long const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<long, float>>, mp_list<std::pair<int, int const>, std::pair<long, float>>>));
}
{
using M = std::tuple<std::pair<int, int const>, std::pair<long, long const>>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, mp_list<char>>, mp_push_back<M, mp_list<char>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<char, char const>>, mp_push_back<M, std::pair<char, char const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, mp_list<int>>, std::tuple<mp_list<int>, std::pair<long, long const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<long, float>>, std::tuple<std::pair<int, int const>, std::pair<long, float>>>));
}
{
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_replace<M, mp_list<char>>, mp_push_back<M, mp_list<char>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<char, char const>>, mp_push_back<M, std::pair<char, char const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::tuple<int>>, mp_list<std::tuple<int>, mp_list<long, long>, mp_list<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<long, float>>, mp_list<mp_list<int>, std::pair<long, float>, mp_list<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, mp_list<long long, float, double>>, mp_list<mp_list<int>, mp_list<long, long>, mp_list<long long, float, double>>>));
}
{
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_replace<M, mp_list<char>>, mp_push_back<M, mp_list<char>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<char, char const>>, mp_push_back<M, std::pair<char, char const>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::tuple<int>>, std::tuple<std::tuple<int>, std::pair<long, long>, std::tuple<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, std::pair<long, float>>, std::tuple<mp_list<int>, std::pair<long, float>, std::tuple<long long, long long, long long>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_replace<M, mp_list<long long, float, double>>, std::tuple<mp_list<int>, std::pair<long, long>, mp_list<long long, float, double>>>));
}
return boost::report_errors();
}