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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
//
//===----------------------------------------------------------------------===//
// <forward_list>
// UNSUPPORTED: c++98, c++03, c++11, c++14
// UNSUPPORTED: libcpp-no-deduction-guides
// template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
// deque(InputIterator, InputIterator, Allocator = Allocator())
// -> deque<typename iterator_traits<InputIterator>::value_type, Allocator>;
//
#include <forward_list>
#include <iterator>
#include <cassert>
#include <cstddef>
#include <climits> // INT_MAX
#include "test_macros.h"
#include "test_iterators.h"
#include "test_allocator.h"
struct A {};
int main()
{
// Test the explicit deduction guides
{
const int arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
std::forward_list fwl(std::begin(arr), std::end(arr));
static_assert(std::is_same_v<decltype(fwl), std::forward_list<int>>, "");
assert(std::equal(fwl.begin(), fwl.end(), std::begin(arr), std::end(arr)));
}
{
const long arr[] = {INT_MAX, 1L, 2L, 3L };
std::forward_list fwl(std::begin(arr), std::end(arr), std::allocator<long>());
static_assert(std::is_same_v<decltype(fwl)::value_type, long>, "");
assert(std::distance(fwl.begin(), fwl.end()) == 4); // no size for forward_list
auto it = fwl.begin();
assert(*it++ == INT_MAX);
assert(*it++ == 1L);
assert(*it++ == 2L);
}
// Test the implicit deduction guides
{
// We don't expect this one to work.
// std::forward_list fwl(std::allocator<int>()); // deque (allocator &)
}
{
std::forward_list fwl(1, A{}); // deque (size_type, T)
static_assert(std::is_same_v<decltype(fwl)::value_type, A>, "");
static_assert(std::is_same_v<decltype(fwl)::allocator_type, std::allocator<A>>, "");
assert(std::distance(fwl.begin(), fwl.end()) == 1); // no size for forward_list
}
{
std::forward_list fwl(1, A{}, test_allocator<A>()); // deque (size_type, T, allocator)
static_assert(std::is_same_v<decltype(fwl)::value_type, A>, "");
static_assert(std::is_same_v<decltype(fwl)::allocator_type, test_allocator<A>>, "");
assert(std::distance(fwl.begin(), fwl.end()) == 1); // no size for forward_list
}
{
std::forward_list fwl{1U, 2U, 3U, 4U, 5U}; // deque(initializer-list)
static_assert(std::is_same_v<decltype(fwl)::value_type, unsigned>, "");
assert(std::distance(fwl.begin(), fwl.end()) == 5); // no size for forward_list
auto it = fwl.begin();
std::advance(it, 2);
assert(*it == 3U);
}
{
std::forward_list fwl({1.0, 2.0, 3.0, 4.0}, test_allocator<double>()); // deque(initializer-list, allocator)
static_assert(std::is_same_v<decltype(fwl)::value_type, double>, "");
static_assert(std::is_same_v<decltype(fwl)::allocator_type, test_allocator<double>>, "");
assert(std::distance(fwl.begin(), fwl.end()) == 4); // no size for forward_list
auto it = fwl.begin();
std::advance(it, 3);
assert(*it == 4.0);
}
{
std::forward_list<long double> source;
std::forward_list fwl(source); // deque(deque &)
static_assert(std::is_same_v<decltype(fwl)::value_type, long double>, "");
static_assert(std::is_same_v<decltype(fwl)::allocator_type, std::allocator<long double>>, "");
assert(std::distance(fwl.begin(), fwl.end()) == 0); // no size for forward_list
}
}
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