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Differential D47360 Diff 219818 test/std/utilities/utility/mem.res/mem.res.aliases/header_unordered_map_synop.pass.cpp

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test/std/utilities/utility/mem.res/mem.res.aliases/header_unordered_map_synop.pass.cpp

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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <unordered_map>
// namespace std::pmr {
// template <class K, class V, class H = hash<K>, class P = equal_to<K> >
// using unordered_map =
// ::std::unordered_map<K, V, H, P, polymorphic_allocator<pair<const K, V>>>
//
// template <class K, class V, class H = hash<K>, class P = equal_to<K> >
// using unordered_multimap =
// ::std::unordered_multimap<K, V, H, P, polymorphic_allocator<pair<const K, V>>>
//
// } // namespace std::pmr
#include <unordered_map>
#include <memory_resource>
#include <type_traits>
#include <cassert>
template <class T>
struct MyHash : std::hash<T> {};
template <class T>
struct MyPred : std::equal_to<T> {};
int main(int, char**)
{
using K = int;
using V = char;
using DH = std::hash<K>;
using MH = MyHash<K>;
using DP = std::equal_to<K>;
using MP = MyPred<K>;
using P = std::pair<const K, V>;
{
using StdMap = std::unordered_map<K, V, DH, DP, std::pmr::polymorphic_allocator<P>>;
using PmrMap = std::pmr::unordered_map<K, V>;
static_assert(std::is_same<StdMap, PmrMap>::value, "");
}
{
using StdMap = std::unordered_map<K, V, MH, DP, std::pmr::polymorphic_allocator<P>>;
using PmrMap = std::pmr::unordered_map<K, V, MH>;
static_assert(std::is_same<StdMap, PmrMap>::value, "");
}
{
using StdMap = std::unordered_map<K, V, MH, MP, std::pmr::polymorphic_allocator<P>>;
using PmrMap = std::pmr::unordered_map<K, V, MH, MP>;
static_assert(std::is_same<StdMap, PmrMap>::value, "");
}
{
std::pmr::unordered_map<int, int> m;
assert(m.get_allocator().resource() == std::pmr::get_default_resource());
}
{
using StdMap = std::unordered_multimap<K, V, DH, DP, std::pmr::polymorphic_allocator<P>>;
using PmrMap = std::pmr::unordered_multimap<K, V>;
static_assert(std::is_same<StdMap, PmrMap>::value, "");
}
{
using StdMap = std::unordered_multimap<K, V, MH, DP, std::pmr::polymorphic_allocator<P>>;
using PmrMap = std::pmr::unordered_multimap<K, V, MH>;
static_assert(std::is_same<StdMap, PmrMap>::value, "");
}
{
using StdMap = std::unordered_multimap<K, V, MH, MP, std::pmr::polymorphic_allocator<P>>;
using PmrMap = std::pmr::unordered_multimap<K, V, MH, MP>;
static_assert(std::is_same<StdMap, PmrMap>::value, "");
}
{
std::pmr::unordered_multimap<int, int> m;
assert(m.get_allocator().resource() == std::pmr::get_default_resource());
}
return 0;
}