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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> pair<iterator, bool> insert(P&& x);
// template<class K> iterator insert(const_iterator hint, P&& x);
#include <algorithm>
#include <compare>
#include <concepts>
#include <deque>
#include <flat_map>
#include <functional>
#include <tuple>
#include "MinSequenceContainer.h"
#include "../helpers.h"
#include "test_macros.h"
#include "test_iterators.h"
#include "min_allocator.h"
// Constraints: is_constructible_v<pair<key_type, mapped_type>, P> is true.
template <class M, class... Args>
concept CanInsert = requires(M m, Args&&... args) { m.insert(std::forward<Args>(args)...); };
using Map = std::flat_map<int, double>;
using Iter = Map::const_iterator;
static_assert(CanInsert<Map, std::pair<short, double>&&>);
static_assert(CanInsert<Map, Iter, std::pair<short, double>&&>);
static_assert(CanInsert<Map, std::tuple<short, double>&&>);
static_assert(CanInsert<Map, Iter, std::tuple<short, double>&&>);
static_assert(!CanInsert<Map, int>);
static_assert(!CanInsert<Map, Iter, int>);
constexpr bool test() {
{
// template<class K> pair<iterator, bool> insert(P&& x);
bool transparent_used = false;
TransparentComparator c(transparent_used);
using M = std::flat_map<int, int, TransparentComparator>;
M m(std::sorted_unique, {{1, 1}, {2, 2}, {4, 4}}, c);
assert(!transparent_used);
std::same_as<std::pair<typename M::iterator, bool>> decltype(auto) res =
m.insert(std::pair(ConvertibleTransparent<int>{3}, 3));
assert(res.second);
assert(res.first->first == 3);
assert(res.first->second == 3);
// Unlike flat_set, here we can't use key_compare to compare value_type versus P,
// so we must eagerly convert to value_type.
assert(!transparent_used);
}
{
// template<class K> iterator insert(const_iterator hint, P&& x);
bool transparent_used = false;
TransparentComparator c(transparent_used);
using M = std::flat_map<int, int, TransparentComparator>;
M m(std::sorted_unique, {{1, 1}, {2, 2}, {4, 4}}, c);
assert(!transparent_used);
std::same_as<typename M::iterator> decltype(auto) res =
m.insert(m.begin(), std::pair(ConvertibleTransparent<int>{3}, 3));
assert(res->first == 3);
assert(res->second == 3);
// Unlike flat_set, here we can't use key_compare to compare value_type versus P,
// so we must eagerly convert to value_type.
assert(!transparent_used);
}
{
// no ambiguity between insert(pos, P&&) and insert(first, last)
using M = std::flat_map<int, int>;
struct Evil {
operator M::value_type() const;
operator M::const_iterator() const;
};
std::flat_map<int, int> m;
ASSERT_SAME_TYPE(decltype(m.insert(Evil())), std::pair<M::iterator, bool>);
ASSERT_SAME_TYPE(decltype(m.insert(m.begin(), Evil())), M::iterator);
ASSERT_SAME_TYPE(decltype(m.insert(m.begin(), m.end())), void);
}
if (!TEST_IS_CONSTANT_EVALUATED) {
{
auto insert_func = [](auto& m, auto key_arg, auto value_arg) {
using FlatMap = std::decay_t<decltype(m)>;
using tuple_type = std::tuple<typename FlatMap::key_type, typename FlatMap::mapped_type>;
tuple_type t(key_arg, value_arg);
m.insert(t);
};
test_emplace_exception_guarantee(insert_func);
}
{
auto insert_func_iter = [](auto& m, auto key_arg, auto value_arg) {
using FlatMap = std::decay_t<decltype(m)>;
using tuple_type = std::tuple<typename FlatMap::key_type, typename FlatMap::mapped_type>;
tuple_type t(key_arg, value_arg);
m.insert(m.begin(), t);
};
test_emplace_exception_guarantee(insert_func_iter);
}
}
{
// 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}};
auto [it, inserted] = m.insert({"alpha", 1});
assert(!inserted);
assert(it == m.begin());
auto it2 = m.insert(m.begin(), {"beta2", 2});
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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