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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>
#include <algorithm>
#include <cassert>
#include <climits>
#include <deque>
#include <initializer_list>
#include <list>
#include <flat_set>
#include <functional>
#include <ranges>
#include <type_traits>
#include <utility>
#include <vector>
#include "deduction_guides_sfinae_checks.h"
#include "test_allocator.h"
void test() {
{
// deduction guide generated from
// flat_set(const flat_set&)
std::flat_set<long> source = {1, 2};
std::flat_set s(source);
ASSERT_SAME_TYPE(decltype(s), decltype(source));
assert(s == source);
}
{
// deduction guide generated from
// flat_set(const flat_set&)
std::flat_set<short, std::greater<short>> source = {1, 2};
std::flat_set s{source}; // braces instead of parens
ASSERT_SAME_TYPE(decltype(s), decltype(source));
assert(s == source);
}
{
// deduction guide generated from
// flat_set(const flat_set&, const Allocator&)
std::flat_set<long, std::greater<long>> source = {1, 2};
std::flat_set s(source, std::allocator<int>());
ASSERT_SAME_TYPE(decltype(s), decltype(source));
assert(s == source);
}
{
// various overloads that takes a container
std::deque<int, test_allocator<int>> ks({1, 2, 1, INT_MAX, 3}, test_allocator<int>(0, 42));
std::deque<int, test_allocator<int>> sorted_ks({1, 2, 3, INT_MAX}, test_allocator<int>(0, 42));
int expected[] = {1, 2, 3, INT_MAX};
{
// template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
// flat_set(KeyContainer, Compare = Compare())
// -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
std::flat_set s(ks);
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::less<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 42);
}
{
// template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
// flat_set(sorted_unique_t, KeyContainer, Compare = Compare())
// -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
std::flat_set s(std::sorted_unique, sorted_ks);
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::less<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 42);
}
{
// template<class KeyContainer, class Allocator>
// flat_set(KeyContainer, Allocator)
// -> flat_set<typename KeyContainer::value_type,
// less<typename KeyContainer::value_type>, KeyContainer>;
std::flat_set s(ks, test_allocator<long>(0, 44));
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::less<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 44);
}
{
// template<class KeyContainer, class Allocator>
// flat_set(sorted_unique_t, KeyContainer, Allocator)
// -> flat_set<typename KeyContainer::value_type,
// less<typename KeyContainer::value_type>, KeyContainer>;
std::flat_set s(std::sorted_unique, sorted_ks, test_allocator<long>(0, 44));
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::less<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 44);
}
}
{
// various overloads that takes a container and a comparator
std::deque<int, test_allocator<int>> ks({1, 2, 1, INT_MAX, 3}, test_allocator<int>(0, 42));
std::deque<int, test_allocator<int>> sorted_ks({INT_MAX, 3, 2, 1}, test_allocator<int>(0, 42));
int expected[] = {INT_MAX, 3, 2, 1};
{
// template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
// flat_set(KeyContainer, Compare = Compare())
// -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
std::flat_set s(ks, std::greater<int>());
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::greater<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 42);
}
{
// template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
// flat_set(sorted_unique_t, KeyContainer, Compare = Compare())
// -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
std::flat_set s(std::sorted_unique, sorted_ks, std::greater<int>());
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::greater<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 42);
}
{
// template<class KeyContainer, class Compare, class Allocator>
// flat_set(KeyContainer, Compare, Allocator)
// -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
std::flat_set s(ks, std::greater<int>(), test_allocator<long>(0, 44));
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::greater<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 44);
}
{
// template<class KeyContainer, class Compare, class Allocator>
// flat_set(sorted_unique_t, KeyContainer, Compare, Allocator)
// -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
std::flat_set s(std::sorted_unique, sorted_ks, std::greater<int>(), test_allocator<long>(0, 44));
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::greater<int>, decltype(ks)>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 44);
}
}
{
// overloads that take pair of iterators
int arr[] = {1, 2, 1, INT_MAX, 3};
int sorted_arr[] = {1, 2, 3, INT_MAX};
const int arrc[] = {1, 2, 1, INT_MAX, 3};
const int sorted_arrc[] = {1, 2, 3, INT_MAX};
{
// template<class InputIterator, class Compare = less<iter-value-type<InputIterator>>>
// flat_set(InputIterator, InputIterator, Compare = Compare())
// -> flat_set<iter-value-type<InputIterator>, Compare>;
std::flat_set m(std::begin(arr), std::end(arr));
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// const
std::flat_set m(std::begin(arrc), std::end(arrc));
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// template<class InputIterator, class Compare = less<iter-value-type<InputIterator>>>
// flat_set(sorted_unique_t, InputIterator, InputIterator, Compare = Compare())
// -> flat_set<iter-value-type<InputIterator>, Compare>;
std::flat_set m(std::sorted_unique, std::begin(sorted_arr), std::end(sorted_arr));
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// const
std::flat_set m(std::sorted_unique, std::begin(sorted_arrc), std::end(sorted_arrc));
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// from flat_set::iterator
std::flat_set<int> mo;
std::flat_set m(mo.begin(), mo.end());
ASSERT_SAME_TYPE(decltype(m), decltype(mo));
}
{
// from flat_set::const_iterator
std::flat_set<int> mo;
std::flat_set m(mo.cbegin(), mo.cend());
ASSERT_SAME_TYPE(decltype(m), decltype(mo));
}
{
// This does not deduce to flat_set(InputIterator, InputIterator)
// But deduces to flat_set(initializer_list<int*>)
std::flat_set s = {arr, arr + 3};
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int*>);
assert(s.size() == 2);
}
{
// This deduces to flat_set(sorted_unique_t, InputIterator, InputIterator)
std::flat_set s{std::sorted_unique, sorted_arr, sorted_arr + 3};
static_assert(std::is_same_v<decltype(s), std::flat_set<int>>);
assert(s.size() == 3);
}
}
{
// overloads that take pair of iterators and comparator
int arr[] = {1, 2, 1, INT_MAX, 3};
int sorted_arr[] = {INT_MAX, 3, 2, 1};
const int arrc[] = {1, 2, 1, INT_MAX, 3};
const int sorted_arrc[] = {INT_MAX, 3, 2, 1};
using C = std::greater<long>;
{
// template<class InputIterator, class Compare = less<iter-value-type<InputIterator>>>
// flat_set(InputIterator, InputIterator, Compare = Compare())
// -> flat_set<iter-value-type<InputIterator>, Compare>;
std::flat_set m(std::begin(arr), std::end(arr), C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// const
std::flat_set m(std::begin(arrc), std::end(arrc), C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// template<class InputIterator, class Compare = less<iter-value-type<InputIterator>>>
// flat_set(sorted_unique_t, InputIterator, InputIterator, Compare = Compare())
// -> flat_set<iter-value-type<InputIterator>, Compare>;
std::flat_set m(std::sorted_unique, std::begin(sorted_arr), std::end(sorted_arr), C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// const
std::flat_set m(std::sorted_unique, std::begin(sorted_arrc), std::end(sorted_arrc), C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// from flat_set::iterator
std::flat_set<int> mo;
std::flat_set m(mo.begin(), mo.end(), C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
}
{
// from flat_set::const_iterator
std::flat_set<int> mo;
std::flat_set m(mo.cbegin(), mo.cend(), C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
}
}
{
// overloads that take an initializer_list
const int sorted_arr[] = {1, 2, 3, INT_MAX};
{
// template<class Key, class Compare = less<Key>>
// flat_set(initializer_list<Key>, Compare = Compare())
// -> flat_set<Key, Compare>;
std::flat_set m{1, 2, 1, INT_MAX, 3};
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// template<class Key, class Compare = less<Key>>
// flat_set(sorted_unique_t, initializer_list<Key>, Compare = Compare())
// -> flat_set<Key, Compare>;
std::flat_set m(std::sorted_unique, {1, 2, 3, INT_MAX});
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// one argument/element of an int -> should be treated as an initializer_list<int>
std::flat_set s = {1};
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int>);
assert(s.size() == 1);
}
{
// two of the flat_sets -> should be treated as an initializer_list<flat_set<int>>
using M = std::flat_set<int>;
M m;
std::flat_set s{m, m}; // flat_set(initializer_list<M>)
ASSERT_SAME_TYPE(decltype(s), std::flat_set<M>);
assert(s.size() == 1);
}
}
{
// overloads that take an initializer_list and a comparator
const int sorted_arr[] = {INT_MAX, 3, 2, 1};
using C = std::greater<long>;
{
// template<class Key, class Compare = less<Key>>
// flat_set(initializer_list<Key>, Compare = Compare())
// -> flat_set<Key, Compare>;
std::flat_set m({1, 2, 1, INT_MAX, 3}, C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
assert(std::ranges::equal(m, sorted_arr));
}
{
// template<class Key, class Compare = less<Key>>
// flat_set(sorted_unique_t, initializer_list<Key>, Compare = Compare())
// -> flat_set<Key, Compare>;
std::flat_set m(std::sorted_unique, {INT_MAX, 3, 2, 1}, C());
ASSERT_SAME_TYPE(decltype(m), std::flat_set<int, C>);
assert(std::ranges::equal(m, sorted_arr));
}
}
{
// from_range without comparator
std::list<int> r = {1, 2, 1, INT_MAX, 3};
const int expected[] = {1, 2, 3, INT_MAX};
{
// template<ranges::input_range R, class Compare = less<ranges::range_value_t<R>>,
// class Allocator = allocator<ranges::range_value_t<R>>>
// flat_set(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())
// -> flat_set<ranges::range_value_t<R>, Compare,
// vector<ranges::range_value_t<R>,
// alloc-rebind<Allocator, ranges::range_value_t<R>>>>;
std::flat_set s(std::from_range, r);
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::less<int>>);
assert(std::ranges::equal(s, expected));
}
{
// template<ranges::input_range R, class Allocator>
// flat_set(from_range_t, R&&, Allocator)
// -> flat_set<ranges::range_value_t<R>, less<ranges::range_value_t<R>>,
// vector<ranges::range_value_t<R>,
// alloc-rebind<Allocator, ranges::range_value_t<R>>>>;
std::flat_set s(std::from_range, r, test_allocator<long>(0, 42));
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::less<int>, std::vector<int, test_allocator<int>>>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 42);
}
}
{
// from_range with comparator
std::list<int> r = {1, 2, 1, INT_MAX, 3};
const int expected[] = {INT_MAX, 3, 2, 1};
{
// template<ranges::input_range R, class Compare = less<ranges::range_value_t<R>>,
// class Allocator = allocator<ranges::range_value_t<R>>>
// flat_set(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())
// -> flat_set<ranges::range_value_t<R>, Compare,
// vector<ranges::range_value_t<R>,
// alloc-rebind<Allocator, ranges::range_value_t<R>>>>;
std::flat_set s(std::from_range, r, std::greater<int>());
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::greater<int>>);
assert(std::ranges::equal(s, expected));
}
{
// template<ranges::input_range R, class Allocator>
// flat_set(from_range_t, R&&, Allocator)
// -> flat_set<ranges::range_value_t<R>, less<ranges::range_value_t<R>>,
// vector<ranges::range_value_t<R>,
// alloc-rebind<Allocator, ranges::range_value_t<R>>>>;
std::flat_set s(std::from_range, r, std::greater<int>(), test_allocator<long>(0, 42));
ASSERT_SAME_TYPE(decltype(s), std::flat_set<int, std::greater<int>, std::vector<int, test_allocator<int>>>);
assert(std::ranges::equal(s, expected));
assert(std::move(s).extract().get_allocator().get_id() == 42);
}
}
AssociativeContainerDeductionGuidesSfinaeAway<std::flat_set, std::flat_set<int>>();
}
int main(int, char**) {
test();
return 0;
}
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