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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>
// template<class K> mapped_type& at(const K& x);
// template<class K> const mapped_type& at(const K& x) const;
#include <cassert>
#include <deque>
#include <flat_map>
#include <functional>
#include <stdexcept>
#include "../helpers.h"
#include "min_allocator.h"
#include "MinSequenceContainer.h"
#include "test_macros.h"
// Constraints: The qualified-id Compare::is_transparent is valid and denotes a type.
template <class M>
concept CanAt = requires(M m, Transparent<int> k) { m.at(k); };
using TransparentMap = std::flat_map<int, double, TransparentComparator>;
using NonTransparentMap = std::flat_map<int, double, NonTransparentComparator>;
static_assert(CanAt<TransparentMap>);
static_assert(CanAt<const TransparentMap>);
static_assert(!CanAt<NonTransparentMap>);
static_assert(!CanAt<const NonTransparentMap>);
template <class KeyContainer, class ValueContainer>
constexpr void test() {
using P = std::pair<int, double>;
P ar[] = {
P(1, 1.5),
P(2, 2.5),
P(3, 3.5),
P(4, 4.5),
P(5, 5.5),
P(7, 7.5),
P(8, 8.5),
};
const Transparent<int> one{1};
{
std::flat_map<int, double, TransparentComparator, KeyContainer, ValueContainer> m(
ar, ar + sizeof(ar) / sizeof(ar[0]));
ASSERT_SAME_TYPE(decltype(m.at(one)), double&);
assert(m.size() == 7);
assert(m.at(one) == 1.5);
m.at(one) = -1.5;
assert(m.at(Transparent<int>{1}) == -1.5);
assert(m.at(Transparent<int>{2}) == 2.5);
assert(m.at(Transparent<int>{3}) == 3.5);
assert(m.at(Transparent<int>{4}) == 4.5);
assert(m.at(Transparent<int>{5}) == 5.5);
#ifndef TEST_HAS_NO_EXCEPTIONS
if (!TEST_IS_CONSTANT_EVALUATED) {
try {
TEST_IGNORE_NODISCARD m.at(Transparent<int>{6});
assert(false);
} catch (std::out_of_range&) {
}
}
#endif
assert(m.at(Transparent<int>{7}) == 7.5);
assert(m.at(Transparent<int>{8}) == 8.5);
assert(m.size() == 7);
}
{
const std::flat_map<int, double, TransparentComparator, KeyContainer, ValueContainer> m(
ar, ar + sizeof(ar) / sizeof(ar[0]));
ASSERT_SAME_TYPE(decltype(m.at(one)), const double&);
assert(m.size() == 7);
assert(m.at(Transparent<int>{1}) == 1.5);
assert(m.at(Transparent<int>{2}) == 2.5);
assert(m.at(Transparent<int>{3}) == 3.5);
assert(m.at(Transparent<int>{4}) == 4.5);
assert(m.at(Transparent<int>{5}) == 5.5);
#ifndef TEST_HAS_NO_EXCEPTIONS
if (!TEST_IS_CONSTANT_EVALUATED) {
try {
TEST_IGNORE_NODISCARD m.at(Transparent<int>{6});
assert(false);
} catch (std::out_of_range&) {
}
}
#endif
assert(m.at(Transparent<int>{7}) == 7.5);
assert(m.at(Transparent<int>{8}) == 8.5);
assert(m.size() == 7);
}
}
constexpr bool test() {
test<std::vector<int>, std::vector<double>>();
#ifndef __cpp_lib_constexpr_deque
if (!TEST_IS_CONSTANT_EVALUATED)
#endif
{
test<std::deque<int>, std::vector<double>>();
}
test<MinSequenceContainer<int>, MinSequenceContainer<double>>();
test<std::vector<int, min_allocator<int>>, std::vector<double, min_allocator<double>>>();
{
bool transparent_used = false;
TransparentComparator c(transparent_used);
std::flat_map<int, int, TransparentComparator> m(std::sorted_unique, {{1, 1}, {2, 2}, {3, 3}}, c);
assert(!transparent_used);
TEST_IGNORE_NODISCARD m.at(Transparent<int>{3});
assert(transparent_used);
}
{
// LWG4239 std::string and C string literal
using M = std::flat_map<std::string, int, std::less<>>;
M m{{"alpha", 1}, {"beta", 2}, {"epsilon", 1}, {"eta", 3}, {"gamma", 3}};
int& x = m.at("alpha");
assert(x == 1);
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 26
static_assert(test());
#endif
return 0;
}
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