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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>
// iterator begin() noexcept;
// const_iterator begin() const noexcept
// iterator end() noexcept;
// const_iterator end() const noexcept;
//
// const_iterator cbegin() const noexcept;
// const_iterator cend() const noexcept;
#include <cassert>
#include <cstddef>
#include <deque>
#include <flat_set>
#include <functional>
#include <string>
#include "MinSequenceContainer.h"
#include "test_macros.h"
#include "min_allocator.h"
template <class KeyContainer>
constexpr void test_one() {
using Key = typename KeyContainer::value_type;
using M = std::flat_set<Key, std::less<Key>, KeyContainer>;
M m = {1, 2, 3, 4};
const M& cm = m;
ASSERT_SAME_TYPE(decltype(m.begin()), typename M::iterator);
ASSERT_SAME_TYPE(decltype(m.cbegin()), typename M::const_iterator);
ASSERT_SAME_TYPE(decltype(cm.begin()), typename M::const_iterator);
ASSERT_SAME_TYPE(decltype(m.end()), typename M::iterator);
ASSERT_SAME_TYPE(decltype(m.cend()), typename M::const_iterator);
ASSERT_SAME_TYPE(decltype(cm.end()), typename M::const_iterator);
static_assert(noexcept(m.begin()));
static_assert(noexcept(cm.begin()));
static_assert(noexcept(m.cbegin()));
static_assert(noexcept(m.end()));
static_assert(noexcept(cm.end()));
static_assert(noexcept(m.cend()));
assert(m.size() == 4);
assert(std::distance(m.begin(), m.end()) == 4);
assert(std::distance(cm.begin(), cm.end()) == 4);
assert(std::distance(m.cbegin(), m.cend()) == 4);
typename M::iterator i; // default-construct
i = m.begin(); // move-assignment
typename M::const_iterator k = i; // converting constructor
assert(i == k); // comparison
for (int j = 1; j <= 4; ++j, ++i) { // pre-increment
assert(*i == j); // operator*
}
assert(i == m.end());
for (int j = 4; j >= 1; --j) {
--i; // pre-decrement
assert((*i) == j);
}
assert(i == m.begin());
}
constexpr bool test() {
test_one<std::vector<int>>();
#ifndef __cpp_lib_constexpr_deque
if (!TEST_IS_CONSTANT_EVALUATED)
#endif
test_one<std::deque<int>>();
test_one<MinSequenceContainer<int>>();
test_one<std::vector<int, min_allocator<int>>>();
{
// N3644 testing
using C = std::flat_set<int>;
C::iterator ii1{}, ii2{};
C::iterator ii4 = ii1;
C::const_iterator cii{};
assert(ii1 == ii2);
assert(ii1 == ii4);
assert(!(ii1 != ii2));
assert((ii1 == cii));
assert((cii == ii1));
assert(!(ii1 != cii));
assert(!(cii != ii1));
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 26
static_assert(test());
#endif
return 0;
}
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