//===----------------------------------------------------------------------===//
//
// 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
// <algorithm>
//
// Range algorithms should return `std::ranges::dangling` when given a dangling range.
#include <algorithm>
#include <array>
#include <concepts>
#include <functional>
#include <iterator>
#include <ranges>
#include <random>
#include <utility>
#include "test_iterators.h"
struct NonBorrowedRange {
using Iter = int*;
using Sent = sentinel_wrapper<Iter>;
int* data_;
std::size_t size_;
template <std::size_t N>
constexpr explicit NonBorrowedRange(std::array<int, N>& arr) : data_{arr.data()}, size_{arr.size()} {}
constexpr Iter begin() const { return data_; };
constexpr Sent end() const { return Sent{data_ + size_}; };
};
using R = NonBorrowedRange;
// (dangling_in, ...)
template <class ExpectedT = std::ranges::dangling, class Func, std::ranges::range Input, class ...Args>
constexpr void dangling_1st(Func&& func, Input& in, Args&& ...args) {
decltype(auto) result = func(R(in), std::forward<Args>(args)...);
static_assert(std::same_as<decltype(result), ExpectedT>);
}
// (in, dangling_in, ...)
template <class ExpectedT = std::ranges::dangling, class Func, std::ranges::range Input, class ...Args>
constexpr void dangling_2nd(Func&& func, Input& in1, Input& in2, Args&& ...args) {
decltype(auto) result = func(in1, R(in2), std::forward<Args>(args)...);
static_assert(std::same_as<decltype(result), ExpectedT>);
}
// (dangling_in1, dangling_in2, ...)
template <class ExpectedT = std::ranges::dangling, class Func, std::ranges::range Input, class ...Args>
constexpr void dangling_both(Func&& func, Input& in1, Input& in2, Args&& ...args) {
decltype(auto) result = func(R(in1), R(in2), std::forward<Args>(args)...);
static_assert(std::same_as<decltype(result), ExpectedT>);
}
std::mt19937 rand_gen() { return std::mt19937(); }
// TODO: also check the iterator values for algorithms that return `*_result` types.
constexpr bool test_all() {
using std::ranges::dangling;
using std::ranges::binary_transform_result;
using std::ranges::copy_result;
using std::ranges::copy_backward_result;
using std::ranges::copy_if_result;
using std::ranges::for_each_result;
using std::ranges::merge_result;
using std::ranges::minmax_result;
using std::ranges::mismatch_result;
using std::ranges::move_result;
using std::ranges::move_backward_result;
using std::ranges::next_permutation_result;
using std::ranges::partial_sort_copy_result;
using std::ranges::partition_copy_result;
using std::ranges::prev_permutation_result;
using std::ranges::remove_copy_result;
using std::ranges::remove_copy_if_result;
using std::ranges::replace_copy_result;
using std::ranges::replace_copy_if_result;
using std::ranges::reverse_copy_result;
using std::ranges::rotate_copy_result;
using std::ranges::set_difference_result;
using std::ranges::set_intersection_result;
using std::ranges::set_symmetric_difference_result;
using std::ranges::set_union_result;
using std::ranges::swap_ranges_result;
using std::ranges::unary_transform_result;
using std::ranges::unique_copy_result;
using InIter = std::array<int, 3>::iterator;
using OutIter = std::array<int, 6>::iterator;
auto unary_pred = [](int i) { return i > 0; };
auto binary_pred = [](int i, int j) { return i < j; };
auto gen = [] { return 42; };
std::array in = {1, 2, 3};
std::array in2 = {4, 5, 6};
auto mid = in.data() + 1;
std::array output = {7, 8, 9, 10, 11, 12};
auto out = output.begin();
auto out2 = output.begin() + 1;
int x = 2;
std::size_t count = 1;
dangling_1st(std::ranges::find, in, x);
dangling_1st(std::ranges::find_if, in, unary_pred);
dangling_1st(std::ranges::find_if_not, in, unary_pred);
#if TEST_STD_VER >= 23
dangling_1st(std::ranges::find_last, in, x);
dangling_1st(std::ranges::find_last_if, in, unary_pred);
dangling_1st(std::ranges::find_last_if_not, in, unary_pred);
#endif
dangling_1st(std::ranges::find_first_of, in, in2);
dangling_1st(std::ranges::adjacent_find, in);
dangling_1st<mismatch_result<dangling, InIter>>(std::ranges::mismatch, in, in2);
dangling_2nd<mismatch_result<InIter, dangling>>(std::ranges::mismatch, in, in2);
dangling_both<mismatch_result<dangling, dangling>>(std::ranges::mismatch, in, in2);
dangling_1st(std::ranges::partition_point, in, unary_pred);
dangling_1st(std::ranges::lower_bound, in, x);
dangling_1st(std::ranges::upper_bound, in, x);
dangling_1st(std::ranges::equal_range, in, x);
dangling_1st(std::ranges::min_element, in);
dangling_1st(std::ranges::max_element, in);
dangling_1st<minmax_result<dangling>>(std::ranges::minmax_element, in);
dangling_1st(std::ranges::search, in, in2);
dangling_1st(std::ranges::search_n, in, count, x);
dangling_1st(std::ranges::find_end, in, in2);
dangling_1st(std::ranges::is_sorted_until, in);
dangling_1st(std::ranges::is_heap_until, in);
dangling_1st<for_each_result<dangling, decltype(unary_pred)>>(std::ranges::for_each, in, unary_pred);
dangling_1st<copy_result<dangling, OutIter>>(std::ranges::copy, in, out);
dangling_1st<copy_backward_result<dangling, OutIter>>(std::ranges::copy_backward, in, output.end());
dangling_1st<copy_if_result<dangling, OutIter>>(std::ranges::copy_if, in, out, unary_pred);
dangling_1st<move_result<dangling, OutIter>>(std::ranges::move, in, out);
dangling_1st<move_backward_result<dangling, OutIter>>(std::ranges::move_backward, in, output.end());
dangling_1st(std::ranges::fill, in, x);
{ // transform
using OutTransformIter = std::array<bool, 3>::iterator;
std::array out_transform = {false, true, true};
dangling_1st<unary_transform_result<dangling, OutTransformIter>>(std::ranges::transform, in, out_transform.begin(), unary_pred);
dangling_1st<binary_transform_result<dangling, InIter, OutTransformIter>>(
std::ranges::transform, in, in2, out_transform.begin(), binary_pred);
dangling_2nd<binary_transform_result<InIter, dangling, OutTransformIter>>(
std::ranges::transform, in, in2, out_transform.begin(), binary_pred);
dangling_both<binary_transform_result<dangling, dangling, OutTransformIter>>(
std::ranges::transform, in, in2, out_transform.begin(), binary_pred);
}
dangling_1st(std::ranges::generate, in, gen);
dangling_1st<remove_copy_result<dangling, OutIter>>(std::ranges::remove_copy, in, out, x);
dangling_1st<remove_copy_if_result<dangling, OutIter>>(std::ranges::remove_copy_if, in, out, unary_pred);
dangling_1st(std::ranges::replace, in, x, x);
dangling_1st(std::ranges::replace_if, in, std::identity{}, x);
dangling_1st<replace_copy_result<dangling, OutIter>>(std::ranges::replace_copy, in, out, x, x);
dangling_1st<replace_copy_if_result<dangling, OutIter>>(std::ranges::replace_copy_if, in, out, unary_pred, x);
dangling_1st<swap_ranges_result<dangling, InIter>>(std::ranges::swap_ranges, in, in2);
dangling_2nd<swap_ranges_result<InIter, dangling>>(std::ranges::swap_ranges, in, in2);
dangling_both<swap_ranges_result<dangling, dangling>>(std::ranges::swap_ranges, in, in2);
dangling_1st<reverse_copy_result<dangling, OutIter>>(std::ranges::reverse_copy, in, out);
dangling_1st<rotate_copy_result<dangling, OutIter>>(std::ranges::rotate_copy, in, mid, out);
dangling_1st<unique_copy_result<dangling, OutIter>>(std::ranges::unique_copy, in, out);
dangling_1st<partition_copy_result<dangling, OutIter, OutIter>>(std::ranges::partition_copy, in, out, out2, unary_pred);
dangling_1st<partial_sort_copy_result<dangling, InIter>>(std::ranges::partial_sort_copy, in, in2);
dangling_2nd<partial_sort_copy_result<InIter, dangling>>(std::ranges::partial_sort_copy, in, in2);
dangling_both<partial_sort_copy_result<dangling, dangling>>(std::ranges::partial_sort_copy, in, in2);
dangling_1st<merge_result<dangling, InIter, OutIter>>(std::ranges::merge, in, in2, out);
dangling_2nd<merge_result<InIter, dangling, OutIter>>(std::ranges::merge, in, in2, out);
dangling_both<merge_result<dangling, dangling, OutIter>>(std::ranges::merge, in, in2, out);
dangling_1st<set_difference_result<dangling, OutIter>>(std::ranges::set_difference, in, in2, out);
dangling_1st<set_intersection_result<dangling, InIter, OutIter>>(std::ranges::set_intersection, in, in2, out);
dangling_2nd<set_intersection_result<InIter, dangling, OutIter>>(std::ranges::set_intersection, in, in2, out);
dangling_both<set_intersection_result<dangling, dangling, OutIter>>(std::ranges::set_intersection, in, in2, out);
dangling_1st<set_symmetric_difference_result<dangling, InIter, OutIter>>(
std::ranges::set_symmetric_difference, in, in2, out);
dangling_2nd<set_symmetric_difference_result<InIter, dangling, OutIter>>(
std::ranges::set_symmetric_difference, in, in2, out);
dangling_both<set_symmetric_difference_result<dangling, dangling, OutIter>>(
std::ranges::set_symmetric_difference, in, in2, out);
dangling_1st<set_union_result<dangling, InIter, OutIter>>(std::ranges::set_union, in, in2, out);
dangling_2nd<set_union_result<InIter, dangling, OutIter>>(std::ranges::set_union, in, in2, out);
dangling_both<set_union_result<dangling, dangling, OutIter>>(std::ranges::set_union, in, in2, out);
dangling_1st(std::ranges::remove, in, x);
dangling_1st(std::ranges::remove_if, in, unary_pred);
dangling_1st(std::ranges::reverse, in);
dangling_1st(std::ranges::rotate, in, mid);
if (!std::is_constant_evaluated()) // `shuffle` isn't `constexpr`.
dangling_1st(std::ranges::shuffle, in, rand_gen());
dangling_1st(std::ranges::unique, in);
dangling_1st(std::ranges::partition, in, unary_pred);
if (!std::is_constant_evaluated())
dangling_1st(std::ranges::stable_partition, in, unary_pred);
dangling_1st(std::ranges::sort, in);
if (!std::is_constant_evaluated())
dangling_1st(std::ranges::stable_sort, in);
dangling_1st(std::ranges::partial_sort, in, mid);
dangling_1st(std::ranges::nth_element, in, mid);
if (!std::is_constant_evaluated())
dangling_1st(std::ranges::inplace_merge, in, mid);
dangling_1st(std::ranges::make_heap, in);
dangling_1st(std::ranges::push_heap, in);
dangling_1st(std::ranges::pop_heap, in);
dangling_1st(std::ranges::make_heap, in);
dangling_1st(std::ranges::sort_heap, in);
dangling_1st<prev_permutation_result<dangling>>(std::ranges::prev_permutation, in);
dangling_1st<next_permutation_result<dangling>>(std::ranges::next_permutation, in);
return true;
}
int main(int, char**) {
test_all();
static_assert(test_all());
return 0;
}
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