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Add mp_replace_at(_c)

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This commit is contained in:
Peter Dimov
2017-03-18 20:20:31 +02:00
parent 79f8c574f3
commit 7e8d618793
4 changed files with 137 additions and 0 deletions
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19
include/boost/mp11/algorithm.hpp
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@@ -834,6 +834,25 @@ template<class L, template<class...> class P> using mp_none_of = mp_bool< mp_cou
// mp_any_of<L, P>
template<class L, template<class...> class P> using mp_any_of = mp_bool< mp_count_if<L, P>::value != 0 >;
// mp_replace_at_c<L, I, W>
namespace detail
{
template<class L, class I, class W> struct mp_replace_at_impl
{
static_assert( I::value >= 0, "mp_replace_at<L, I, W>: I must not be negative" );
template<class T1, class T2> using _p = std::is_same<T2, mp_size_t<I::value>>;
template<class T1, class T2> using _f = W;
using type = mp_transform_if<_p, _f, L, mp_iota<mp_size<L>>>;
};
} // namespace detail
template<class L, class I, class W> using mp_replace_at = typename detail::mp_replace_at_impl<L, I, W>::type;
template<class L, std::size_t I, class W> using mp_replace_at_c = typename detail::mp_replace_at_impl<L, mp_size_t<I>, W>::type;
} // namespace mp11
} // namespace boost

2
test/Jamfile.v2
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@@ -60,6 +60,8 @@ run mp_unique.cpp : : : $(REQ) ;
run mp_all_of.cpp : : : $(REQ) ;
run mp_any_of.cpp : : : $(REQ) ;
run mp_none_of.cpp : : : $(REQ) ;
run mp_replace_at.cpp : : : $(REQ) ;
run mp_replace_at_c.cpp : : : $(REQ) ;
# integral
run integral.cpp : : : $(REQ) ;

60
test/mp_replace_at.cpp Normal file
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@@ -0,0 +1,60 @@
// 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/algorithm.hpp>
#include <boost/mp11/list.hpp>
#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#include <tuple>
#include <utility>
struct X1 {};
struct X2 {};
struct X3 {};
struct X4 {};
struct X5 {};
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_replace_at;
using boost::mp11::mp_int;
using boost::mp11::mp_true;
using boost::mp11::mp_false;
{
using L = mp_list<X1, X2, X3, X4, X5>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<0>, void>, mp_list<void, X2, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<1>, void>, mp_list<X1, void, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<2>, void>, mp_list<X1, X2, void, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<3>, void>, mp_list<X1, X2, X3, void, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<4>, void>, mp_list<X1, X2, X3, X4, void>>));
}
{
using L = std::tuple<X1, X2, X3, X4, X5>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<0>, void>, std::tuple<void, X2, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<1>, void>, std::tuple<X1, void, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<2>, void>, std::tuple<X1, X2, void, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<3>, void>, std::tuple<X1, X2, X3, void, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<4>, void>, std::tuple<X1, X2, X3, X4, void>>));
}
{
using L = std::pair<X1, X2>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_false, void>, std::pair<void, X2>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_true, void>, std::pair<X1, void>>));
}
return boost::report_errors();
}

56
test/mp_replace_at_c.cpp Normal file
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@@ -0,0 +1,56 @@
// 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/algorithm.hpp>
#include <boost/mp11/list.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#include <tuple>
#include <utility>
struct X1 {};
struct X2 {};
struct X3 {};
struct X4 {};
struct X5 {};
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_replace_at_c;
{
using L = mp_list<X1, X2, X3, X4, X5>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 0, void>, mp_list<void, X2, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 1, void>, mp_list<X1, void, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 2, void>, mp_list<X1, X2, void, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 3, void>, mp_list<X1, X2, X3, void, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 4, void>, mp_list<X1, X2, X3, X4, void>>));
}
{
using L = std::tuple<X1, X2, X3, X4, X5>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 0, void>, std::tuple<void, X2, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 1, void>, std::tuple<X1, void, X3, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 2, void>, std::tuple<X1, X2, void, X4, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 3, void>, std::tuple<X1, X2, X3, void, X5>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 4, void>, std::tuple<X1, X2, X3, X4, void>>));
}
{
using L = std::pair<X1, X2>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 0, void>, std::pair<void, X2>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 1, void>, std::pair<X1, void>>));
}
return boost::report_errors();
}