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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_set>
// flat_set();
#include <cassert>
#include <deque>
#include <flat_set>
#include <functional>
#include <type_traits>
#include <vector>
#include "min_allocator.h"
#include "MoveOnly.h"
#include "test_allocator.h"
#include "test_macros.h"
struct DefaultCtableComp {
constexpr explicit DefaultCtableComp() { default_constructed_ = true; }
constexpr bool operator()(int, int) const { return false; }
bool default_constructed_ = false;
};
struct ThrowingCtorComp {
constexpr ThrowingCtorComp() noexcept(false) {}
constexpr bool operator()(const auto&, const auto&) const { return false; }
};
template <template <class...> class KeyContainer>
constexpr void test() {
{
std::flat_set<int, std::less<int>, KeyContainer<int>> m;
assert(m.empty());
}
{
// explicit(false)
std::flat_set<int, std::less<int>, KeyContainer<int>> m = {};
assert(m.empty());
}
{
std::flat_set<int, DefaultCtableComp, KeyContainer<int, min_allocator<int>>> m;
assert(m.empty());
assert(m.begin() == m.end());
assert(m.key_comp().default_constructed_);
}
{
using A1 = explicit_allocator<int>;
{
std::flat_set<int, DefaultCtableComp, KeyContainer<int, A1>> m;
assert(m.empty());
assert(m.key_comp().default_constructed_);
}
{
A1 a1;
std::flat_set<int, DefaultCtableComp, KeyContainer<int, A1>> m(a1);
assert(m.empty());
assert(m.key_comp().default_constructed_);
}
}
#if defined(_LIBCPP_VERSION)
{
using C = std::flat_set<MoveOnly, std::less<MoveOnly>, KeyContainer<MoveOnly>>;
static_assert(std::is_nothrow_default_constructible_v<C>);
C c;
}
{
using C = std::flat_set<MoveOnly, std::less<MoveOnly>, KeyContainer<MoveOnly, test_allocator<MoveOnly>>>;
static_assert(std::is_nothrow_default_constructible_v<C>);
C c;
}
#endif // _LIBCPP_VERSION
{
using C = std::flat_set<MoveOnly, std::less<MoveOnly>, KeyContainer<MoveOnly, other_allocator<MoveOnly>>>;
static_assert(!std::is_nothrow_default_constructible_v<C>);
C c;
}
{
using C = std::flat_set<MoveOnly, ThrowingCtorComp, KeyContainer<MoveOnly>>;
static_assert(!std::is_nothrow_default_constructible_v<C>);
C c;
}
}
constexpr bool test() {
test<std::vector>();
#ifndef __cpp_lib_constexpr_deque
if (!TEST_IS_CONSTANT_EVALUATED)
#endif
test<std::deque>();
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 26
static_assert(test());
#endif
return 0;
}
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