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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>
// key_compare key_comp() const;
// value_compare value_comp() const;
#include <cassert>
#include <flat_set>
#include <functional>
#include <utility>
#include <vector>
#include "test_macros.h"
constexpr bool test() {
{
using M = std::flat_set<int>;
using Comp = std::less<int>; // the default
M m = {};
ASSERT_SAME_TYPE(M::key_compare, Comp);
ASSERT_SAME_TYPE(decltype(m.key_comp()), Comp);
ASSERT_SAME_TYPE(decltype(m.value_comp()), Comp);
Comp kc = m.key_comp();
assert(kc(1, 2));
assert(!kc(2, 1));
auto vc = m.value_comp();
assert(vc(1, 2));
assert(!vc(2, 1));
}
if (!TEST_IS_CONSTANT_EVALUATED) {
using Comp = std::function<bool(int, int)>;
using M = std::flat_set<int, Comp>;
Comp comp = std::greater<int>();
M m({}, comp);
ASSERT_SAME_TYPE(M::key_compare, Comp);
ASSERT_SAME_TYPE(decltype(m.key_comp()), Comp);
ASSERT_SAME_TYPE(decltype(m.value_comp()), Comp);
Comp kc = m.key_comp();
assert(!kc(1, 2));
assert(kc(2, 1));
auto vc = m.value_comp();
assert(!vc(1, 2));
assert(vc(2, 1));
}
{
using Comp = std::less<>;
using M = std::flat_set<int, Comp>;
M m = {};
ASSERT_SAME_TYPE(M::key_compare, Comp);
ASSERT_SAME_TYPE(decltype(m.key_comp()), Comp);
ASSERT_SAME_TYPE(decltype(m.value_comp()), Comp);
Comp kc = m.key_comp();
assert(kc(1, 2));
assert(!kc(2, 1));
auto vc = m.value_comp();
auto a = std::make_pair(1, 2);
ASSERT_SAME_TYPE(decltype(vc(a, a)), bool);
assert(vc(1, 2));
assert(!vc(2, 1));
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 26
static_assert(test());
#endif
return 0;
}
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