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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>
// template<class K> iterator upper_bound(const K& x);
// template<class K> const_iterator upper_bound(const K& x) const;
#include <cassert>
#include <deque>
#include <flat_set>
#include <functional>
#include <string>
#include <utility>
#include "MinSequenceContainer.h"
#include "../helpers.h"
#include "test_macros.h"
#include "min_allocator.h"
// Constraints: The qualified-id Compare::is_transparent is valid and denotes a type.
template <class M>
concept CanUpperBound = requires(M m, Transparent<int> k) { m.upper_bound(k); };
using TransparentSet = std::flat_set<int, TransparentComparator>;
using NonTransparentSet = std::flat_set<int, NonTransparentComparator>;
static_assert(CanUpperBound<TransparentSet>);
static_assert(CanUpperBound<const TransparentSet>);
static_assert(!CanUpperBound<NonTransparentSet>);
static_assert(!CanUpperBound<const NonTransparentSet>);
template <class KeyContainer>
constexpr void test_one() {
using Key = typename KeyContainer::value_type;
using M = std::flat_set<Key, TransparentComparator, KeyContainer>;
{
M m = {"alpha", "beta", "epsilon", "eta", "gamma"};
const auto& cm = m;
ASSERT_SAME_TYPE(decltype(m.lower_bound(Transparent<std::string>{"abc"})), typename M::iterator);
ASSERT_SAME_TYPE(decltype(std::as_const(m).lower_bound(Transparent<std::string>{"b"})), typename M::const_iterator);
auto test_upper_bound = [&](auto&& map, const std::string& expected_key, long expected_offset) {
auto iter = map.upper_bound(Transparent<std::string>{expected_key});
assert(iter - map.begin() == expected_offset);
};
test_upper_bound(m, "abc", 0);
test_upper_bound(m, "alpha", 1);
test_upper_bound(m, "beta", 2);
test_upper_bound(m, "bets", 2);
test_upper_bound(m, "charlie", 2);
test_upper_bound(m, "echo", 2);
test_upper_bound(m, "epsilon", 3);
test_upper_bound(m, "eta", 4);
test_upper_bound(m, "gamma", 5);
test_upper_bound(m, "golf", 5);
test_upper_bound(m, "zzz", 5);
test_upper_bound(cm, "abc", 0);
test_upper_bound(cm, "alpha", 1);
test_upper_bound(cm, "beta", 2);
test_upper_bound(cm, "bets", 2);
test_upper_bound(cm, "charlie", 2);
test_upper_bound(cm, "echo", 2);
test_upper_bound(cm, "epsilon", 3);
test_upper_bound(cm, "eta", 4);
test_upper_bound(cm, "gamma", 5);
test_upper_bound(cm, "golf", 5);
test_upper_bound(cm, "zzz", 5);
}
{
// empty
M m;
auto iter = m.upper_bound(Transparent<std::string>{"a"});
assert(iter == m.end());
}
}
constexpr bool test() {
test_one<std::vector<std::string>>();
#ifndef __cpp_lib_constexpr_deque
if (!TEST_IS_CONSTANT_EVALUATED)
#endif
test_one<std::deque<std::string>>();
test_one<MinSequenceContainer<std::string>>();
test_one<std::vector<std::string, min_allocator<std::string>>>();
{
bool transparent_used = false;
TransparentComparator c(transparent_used);
std::flat_set<int, TransparentComparator> m(std::sorted_unique, {1, 2, 3}, c);
assert(!transparent_used);
auto it = m.upper_bound(Transparent<int>{2});
assert(it != m.end());
assert(transparent_used);
}
{
// LWG4239 std::string and C string literal
using M = std::flat_set<std::string, std::less<>>;
M m{"alpha", "beta", "epsilon", "eta", "gamma"};
auto it = m.upper_bound("beta");
assert(it == m.begin() + 2);
auto it2 = m.upper_bound("beta2");
assert(it2 == m.begin() + 2);
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 26
static_assert(test());
#endif
return 0;
}
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