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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// <flat_map>
// flat_multimap(flat_multimap&&)
// noexcept(is_nothrow_move_constructible<key_container_type>::value &&
// is_nothrow_move_constructible<mapped_container_type>::value &&
// is_nothrow_copy_constructible<key_compare>::value);
// This tests a conforming extension
#include <cassert>
#include <deque>
#include <flat_map>
#include <functional>
#include <memory>
#include <type_traits>
#include <vector>
#include "test_macros.h"
#include "MoveOnly.h"
#include "test_allocator.h"
template <class T>
struct ThrowingMoveAllocator {
using value_type = T;
explicit ThrowingMoveAllocator() = default;
ThrowingMoveAllocator(const ThrowingMoveAllocator&) = default;
ThrowingMoveAllocator(ThrowingMoveAllocator&&) noexcept(false) {}
T* allocate(std::ptrdiff_t n) { return std::allocator<T>().allocate(n); }
void deallocate(T* p, std::ptrdiff_t n) { return std::allocator<T>().deallocate(p, n); }
friend bool operator==(ThrowingMoveAllocator, ThrowingMoveAllocator) = default;
};
struct ThrowingMoveComp {
ThrowingMoveComp() = default;
ThrowingMoveComp(const ThrowingMoveComp&) noexcept(true) {}
ThrowingMoveComp(ThrowingMoveComp&&) noexcept(false) {}
bool operator()(const auto&, const auto&) const { return false; }
};
struct MoveSensitiveComp {
MoveSensitiveComp() noexcept(false) = default;
MoveSensitiveComp(const MoveSensitiveComp&) noexcept = default;
MoveSensitiveComp(MoveSensitiveComp&& rhs) { rhs.is_moved_from_ = true; }
MoveSensitiveComp& operator=(const MoveSensitiveComp&) noexcept(false) = default;
MoveSensitiveComp& operator=(MoveSensitiveComp&& rhs) {
rhs.is_moved_from_ = true;
return *this;
}
bool operator()(const auto&, const auto&) const { return false; }
bool is_moved_from_ = false;
};
int main(int, char**) {
{
using C = std::flat_multimap<int, int>;
LIBCPP_STATIC_ASSERT(std::is_nothrow_move_constructible_v<C>);
C c;
C d = std::move(c);
}
{
using C = std::flat_multimap<int, int, std::less<int>, std::deque<int, test_allocator<int>>>;
LIBCPP_STATIC_ASSERT(std::is_nothrow_move_constructible_v<C>);
C c;
C d = std::move(c);
}
#if _LIBCPP_VERSION
{
// Container fails to be nothrow-move-constructible; this relies on libc++'s support for non-nothrow-copyable allocators
using C =
std::flat_multimap<int, int, std::less<int>, std::deque<int, ThrowingMoveAllocator<int>>, std::vector<int>>;
static_assert(!std::is_nothrow_move_constructible_v<std::deque<int, ThrowingMoveAllocator<int>>>);
static_assert(!std::is_nothrow_move_constructible_v<C>);
C c;
C d = std::move(c);
}
{
// Container fails to be nothrow-move-constructible; this relies on libc++'s support for non-nothrow-copyable allocators
using C =
std::flat_multimap<int, int, std::less<int>, std::vector<int>, std::deque<int, ThrowingMoveAllocator<int>>>;
static_assert(!std::is_nothrow_move_constructible_v<std::deque<int, ThrowingMoveAllocator<int>>>);
static_assert(!std::is_nothrow_move_constructible_v<C>);
C c;
C d = std::move(c);
}
#endif // _LIBCPP_VERSION
{
// Comparator fails to be nothrow-move-constructible
using C = std::flat_multimap<int, int, ThrowingMoveComp>;
static_assert(!std::is_nothrow_move_constructible_v<C>);
C c;
C d = std::move(c);
}
return 0;
}
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