llvm-project/libcxx/test/std/algorithms/ranges_result_alias_declarations.compile.pass.cpp
James E T Smith 475cbf0ad6
[libc++] Implement ranges::iota (#68494)
# Overview

As a disclaimer, this is my first PR to LLVM and while I've tried to
ensure I've followed the LLVM and libc++ contributing guidelines,
there's probably a good chance I missed something. If I have, just let
me know and I'll try to correct it as soon as I can.

This PR implements `std::ranges::iota` and
`std::ranges::out_value_result` outlined in
[P2440r1](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2440r1.html).

As outlined in the paper above, I've:
- Implemented `out_value_result` and added to `<algorithm>`
- Added `out_value_result`, `iota_result`, and two overloads of `iota`
to `std::ranges` in `<numeric>`
- Updated the version macro `__cpp_lib_ranges_iota` in `<version>`

I've also added tests for `ranges::iota` and `ranges::out_value_result`.
Lastly, I added those structs to the appropriate module files.

Partially implements #105184

EDIT: Forgot to mention in the original post, thanks to @hawkinsw for
taking a look at a preliminary version of this PR!

# TODOs
- [x] Updating the range [status
doc](https://github.com/jamesETsmith/llvm-project/blob/main/libcxx/docs/Status/RangesMajorFeatures.csv)
- [x] Ensure all comments from https://reviews.llvm.org/D121436 are
addressed here
- [X] EDIT (I'll do this in a separate PR). ~~I'm open to implementing
the rest of P2440r1 (`ranges::shift_left` and `ranges::shift_right`) if
that's ok, I just wanted to get feedback on `ranges::iota` first~~
- [x] I've been having trouble building the modules locally and want to
make sure that's working properly

Closes: #134060
2025-04-05 13:46:11 +02:00

69 lines
3.9 KiB
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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
// <algorithm>
// ensure that all result alias declarations are defined
#include <algorithm>
#include <numeric>
#include <memory>
#include <type_traits>
#include "test_macros.h"
using namespace std::ranges;
static_assert(std::is_same_v<in_fun_result<int, long>, for_each_result<int, long>>);
static_assert(std::is_same_v<in_fun_result<int, long>, for_each_n_result<int, long>>);
static_assert(std::is_same_v<in_in_result<int, long>, mismatch_result<int, long>>);
static_assert(std::is_same_v<in_in_result<int, long>, swap_ranges_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, copy_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, copy_n_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, copy_if_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, copy_backward_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, move_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, move_backward_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, partial_sort_copy_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, remove_copy_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, remove_copy_if_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, replace_copy_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, replace_copy_if_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, reverse_copy_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, rotate_copy_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, set_difference_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, unary_transform_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, uninitialized_copy_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, uninitialized_copy_n_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, uninitialized_move_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, uninitialized_move_n_result<int, long>>);
static_assert(std::is_same_v<in_out_result<int, long>, unique_copy_result<int, long>>);
static_assert(std::is_same_v<in_in_out_result<int, long, char>, binary_transform_result<int, long, char>>);
static_assert(std::is_same_v<in_in_out_result<int, long, char>, merge_result<int, long, char>>);
static_assert(std::is_same_v<in_in_out_result<int, long, char>, set_symmetric_difference_result<int, long, char>>);
static_assert(std::is_same_v<in_in_out_result<int, long, char>, set_union_result<int, long, char>>);
static_assert(std::is_same_v<in_in_out_result<int, long, char>, set_intersection_result<int, long, char>>);
static_assert(std::is_same_v<in_out_out_result<int, long, char>, partition_copy_result<int, long, char>>);
static_assert(std::is_same_v<min_max_result<int>, minmax_result<int>>);
static_assert(std::is_same_v<min_max_result<int>, minmax_element_result<int>>);
static_assert(std::is_same_v<in_found_result<int>, next_permutation_result<int>>);
static_assert(std::is_same_v<in_found_result<int>, prev_permutation_result<int>>);
#if TEST_STD_VER >= 23
static_assert(std::is_same_v<in_value_result<int, long>, fold_left_with_iter_result<int, long>>);
static_assert(std::is_same_v<out_value_result<int, int>, iota_result<int, int>>);
#endif // TEST_STD_VER