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forked from boostorg/mp11

Add mp_sort_q

This commit is contained in:
Peter Dimov
2017-10-22 01:34:12 +03:00
parent 38654a6884
commit b229d184ac
4 changed files with 66 additions and 0 deletions

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@ -472,6 +472,12 @@ using L1 = mp_list<std::ratio<1,2>, std::ratio<1,4>>;
using R1 = mp_sort<L1, std::ratio_less>; // mp_list<ratio<1,4>, ratio<1,2>>
----
## mp_sort_q<L, Q>
template<class L, class Q> using mp_sort_q = mp_sort<L, Q::template fn>;
As `mp_sort`, but takes a quoted metafunction.
## mp_nth_element_c<L, I, P>
template<class L, std::size_t I, template<class...> class P> using mp_nth_element_c = /*...*/;

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@ -516,6 +516,7 @@ template<template<class...> class L, class T1, class... T, template<class...> cl
} // namespace detail
template<class L, template<class...> class P> using mp_sort = typename detail::mp_sort_impl<L, P>::type;
template<class L, class Q> using mp_sort_q = mp_sort<L, Q::template fn>;
// mp_nth_element(_c)<L, I, P>
namespace detail

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@ -64,6 +64,7 @@ run mp_remove_if_q.cpp ;
run mp_partition.cpp ;
run mp_partition_q.cpp ;
run mp_sort.cpp ;
run mp_sort_q.cpp ;
run mp_find.cpp ;
run mp_find_if.cpp ;
run mp_reverse.cpp ;

58
test/mp_sort_q.cpp Normal file
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@ -0,0 +1,58 @@
// 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>
using boost::mp11::mp_bool;
struct Q_sizeof_less
{
template<class T, class U> using fn = mp_bool<(sizeof(T) < sizeof(U))>;
};
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_sort_q;
{
using L1 = mp_list<>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_sort_q<L1, Q_sizeof_less>, L1>));
using L2 = mp_list<char[2], char[4], char[3], char[1]>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_sort_q<L2, Q_sizeof_less>, mp_list<char[1], char[2], char[3], char[4]>>));
using L3 = mp_list<char[2], char[4], char[2], char[3], char[1], char[2], char[1]>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_sort_q<L3, Q_sizeof_less>, mp_list<char[1], char[1], char[2], char[2], char[2], char[3], char[4]>>));
}
{
using L1 = std::tuple<>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_sort_q<L1, Q_sizeof_less>, L1>));
using L2 = std::tuple<char[2], char[4], char[3], char[1]>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_sort_q<L2, Q_sizeof_less>, std::tuple<char[1], char[2], char[3], char[4]>>));
using L3 = std::tuple<char[2], char[4], char[2], char[3], char[1], char[2], char[1]>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_sort_q<L3, Q_sizeof_less>, std::tuple<char[1], char[1], char[2], char[2], char[2], char[3], char[4]>>));
}
return boost::report_errors();
}