{"id":15047463,"url":"https://github.com/lackhole/stl-preview","last_synced_at":"2025-04-10T00:51:13.383Z","repository":{"id":244402919,"uuid":"812148596","full_name":"lackhole/stl-preview","owner":"lackhole","description":"C++26 STL for C++14~ developers","archived":false,"fork":false,"pushed_at":"2025-04-09T09:02:44.000Z","size":2737,"stargazers_count":10,"open_issues_count":4,"forks_count":3,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-04-10T00:51:05.685Z","etag":null,"topics":["cpp","cpp14","cpp17","cpp20","cpp23","cpp26","expected","library","monadic","preview","ranges","standard","standard-library","standard-template-library","stl","template","variant"],"latest_commit_sha":null,"homepage":"","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"bsd-3-clause","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/lackhole.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.txt","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2024-06-08T04:58:03.000Z","updated_at":"2025-04-02T04:35:47.000Z","dependencies_parsed_at":"2024-06-28T12:26:04.481Z","dependency_job_id":"1d0c467e-0230-43b9-8a4f-ab5ac8841e23","html_url":"https://github.com/lackhole/stl-preview","commit_stats":{"total_commits":92,"total_committers":2,"mean_commits":46.0,"dds":"0.021739130434782594","last_synced_commit":"8a219939b9e4d6e3dcf0a09af4a1eb4528a04ebd"},"previous_names":["lackhole/stl-preview"],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lackhole%2Fstl-preview","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lackhole%2Fstl-preview/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lackhole%2Fstl-preview/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lackhole%2Fstl-preview/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/lackhole","download_url":"https://codeload.github.com/lackhole/stl-preview/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248137997,"owners_count":21053775,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["cpp","cpp14","cpp17","cpp20","cpp23","cpp26","expected","library","monadic","preview","ranges","standard","standard-library","standard-template-library","stl","template","variant"],"created_at":"2024-09-24T20:58:46.662Z","updated_at":"2025-04-10T00:51:13.359Z","avatar_url":"https://github.com/lackhole.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"# STL Preview\n![logo.png](logo.png)\n\n## Description\n**Use the latest STL implementation regardless of your C++ version (C++14 ~)**\n\n```c++\n// All implementations are written under C++14 standard semantics\n#include \"preview/ranges.h\"\n\nauto map = preview::views::iota('A', 'E') | \n preview::views::enumerate | \n preview::ranges::to\u003cstd::map\u003e(); // See notes about CTAD below\n\nstd::cout \u003c\u003c map[0] \u003c\u003c ' '\n \u003c\u003c map[1] \u003c\u003c ' '\n \u003c\u003c map[2] \u003c\u003c '\\n';\n// A B C\n```\n\n**`preview` is standard-conforming, and is compatible with existing STL**\n```c++\n// Pre-C++20 iterators are fully compatible\nauto floats = std::istringstream{\"1.1 2.2\\t3.3\\v4.4\\f55\\n66\\r7.7 8.8\"};\nranges::copy(views::istream\u003cfloat\u003e(floats), std::ostream_iterator\u003cfloat\u003e{std::cout, \", \"});\n\n// Complex ranges/iterators are also compatible with both pre C++20 and \n// post C++20 std::iterator_traits\nauto r = preview::views::iota(0) |\n preview::views::take(10) |\n preview::views::filter([](auto x) { return x % 2 == 0; });\n\nstatic_assert(std::is_same\u003c\n std::iterator_traits\u003cdecltype(r.begin())\u003e::reference,\n int\n\u003e::value, \"\");\n\n```\n\n**Up to C++26 STL are available**\n```c++\nvoid foo(preview::span\u003cint\u003e) {}\n\nint main() {\n // span with C++26 standard\n foo({1, 2, 3});\n \n preview::variant\u003cint, float, double\u003e v{1.0f};\n v.visit([](auto x) {\n // member visit(): C++26 standard\n });\n \n // views::concat\n std::vector\u003cchar\u003e v = {'h', 'e', 'l'};\n std::string s = \"lo, \";\n preview::string_view sv = \"world\";\n std::list\u003cchar\u003e l = {'!'};\n\n // hello, world!\n for (auto c : preview::views::concat(v, s, sv, l)) {\n std::cout \u003c\u003c c;\n }\n \n // expected\n auto process = [](preview::string_view str) -\u003e preview::expected\u003cint, std::string\u003e {\n return parse_number(str)\n .transform([](double v) { return static_cast\u003cint\u003e(v); })\n .transform_error([](parse_error e) {\n return e == parse_error::invalid_input ? \"invalid input\" : \"overflow\";\n });\n };\n std::cout \u003c\u003c process(\"42\").value_or(-1) \u003c\u003c '\\n;'; // 42\n std::cout \u003c\u003c process(\"inf\").value_or(-1) \u003c\u003c '\\n'; // -1\n}\n```\n\n## Compiler Support\n[![Build Status](https://github.com/lackhole/stl-preview/actions/workflows/cmake-multi-platform.yml/badge.svg)](https://github.com/lackhole/stl-preview/actions/workflows/cmake-multi-platform.yml)\n\nNote: Requires C++14 or later\n\n| Compiler | Minimum version tested | Maximum version tested |\n|-------------|------------------------------------|------------------------------------|\n| MSVC | 19.16.27051.0 (Visual Studio 2017) | 19.40.33811.0 (Visual Studio 2022) |\n| gcc | 9.5.0 | 13.1.0 |\n| clang | 11.1.0 | 15.0.7 |\n| Apple clang | 14.0.0.14000029 | 15.0.0.15000040 (Silicon) |\n| Android NDK | r18 (clang 7.0) | r26 (clang 17.0.2) |\n| Emscripten | 3.1.20 (clang 16.0.0) | latest(3.1.61) (clang 19.0.0) |\n| MinGW | 13.1.0 | 14.2.0 |\n| Intel C++ | ? | icx 2024.2 |\n\n## Media\nCppCon2024 \n* [C++17/20/23/26 for old C++ Developers - STL Preview](media/cppcon_poster.pdf)\n* Best Poster Award\n\n## Build \u0026 Install\n### CMake\nCopy this repository under your project and use `add_subdirectory`\n```cmake\nadd_subdirectory(path/to/preview)\ntarget_link_libraries(your-project INTERFACE preview)\n```\n\n### Non-CMake\nAlthough it is not recommended, you can just copy \u0026 paste files under `include/` into your project. \n* Note: Without CMake configuration, heuristic compiler/STL checks will be performed. \n\n### Installation\nWith the reason stated in [Non-CMake](#non-cmake), installation is possible but not recommended.\n\n## Implementation Status\nImplementation available in C++14 ~ :\n\n| Header | Total | | C++17 | C++20 | C++23 | C++26 |\n|-------------------------------------|---------------------------------------------------------|---|--------------------------------------------------------|---------------------------------------------------------|--------------------------------------------------------|--------------------------------------------------------|\n| | ![](https://img.shields.io/badge/316/694-grey)![][p046] | | ![](https://img.shields.io/badge/44/113-grey)![][p039] | ![](https://img.shields.io/badge/233/429-grey)![][p054] | ![](https://img.shields.io/badge/61/144-grey)![][p042] | ![](https://img.shields.io/badge/18/135-grey)![][p013] |\n| | | | | | | |\n| [algorithm](#algorithm) | ![](https://img.shields.io/badge/56/115-grey)![][p049] | | ![](https://img.shields.io/badge/2/4-grey)![][p050] | ![](https://img.shields.io/badge/47/96-grey)![][p049] | ![](https://img.shields.io/badge/9/18-grey)![][p050] | ![](https://img.shields.io/badge/7/23-grey)![][p030] |\n| [any](#any) | ![](https://img.shields.io/badge/5/5-grey)![][p100] | | ![](https://img.shields.io/badge/5/5-grey)![][p100] | | | |\n| [array](#array) | ![](https://img.shields.io/badge/1/1-grey)![][p100] | | | ![](https://img.shields.io/badge/1/1-grey)![][p100] | | |\n| [bit](#bit) | ![](https://img.shields.io/badge/2/14-grey)![][p014] | | | ![](https://img.shields.io/badge/1/13-grey)![][p008] | ![](https://img.shields.io/badge/1/1-grey)![][p100] | |\n| [concepts](#concepts) | ![](https://img.shields.io/badge/30/30-grey)![][p100] | | | ![](https://img.shields.io/badge/30/30-grey)![][p100] | ![](https://img.shields.io/badge/1/1-grey)![][p100] | |\n| [cstddef](#cstddef) | ![](https://img.shields.io/badge/2/2-grey)![][p100] | | ![](https://img.shields.io/badge/2/2-grey)![][p100] | | | |\n| [expected](#expected) | ![](https://img.shields.io/badge/4/4-grey)![][p100] | | | | ![](https://img.shields.io/badge/4/4-grey)![][p100] | |\n| [functional](#functional) | ![](https://img.shields.io/badge/10/16-grey)![][p063] | | ![](https://img.shields.io/badge/4/6-grey)![][p067] | ![](https://img.shields.io/badge/12/14-grey)![][p086] | ![](https://img.shields.io/badge/3/4-grey)![][p075] | ![](https://img.shields.io/badge/4/6-grey)![][p067] |\n| [iterator](#iterator) | ![](https://img.shields.io/badge/57/59-grey)![][p097] | | ![](https://img.shields.io/badge/1/3-grey)![][p033] | ![](https://img.shields.io/badge/51/52-grey)![][p098] | ![](https://img.shields.io/badge/5/5-grey)![][p100] | ![](https://img.shields.io/badge/2/2-grey)![][p100] |\n| [memory](#memory) | ![](https://img.shields.io/badge/9/44-grey)![][p020] | | ![](https://img.shields.io/badge/4/11-grey)![][p036] | ![](https://img.shields.io/badge/9/35-grey)![][p026] | ![](https://img.shields.io/badge/0/4-grey)![][p000] | ![](https://img.shields.io/badge/0/2-grey)![][p000] |\n| [numbers](#numbers) | ![](https://img.shields.io/badge/13/13-grey)![][p100] | | | ![](https://img.shields.io/badge/13/13-grey)![][p100] | | |\n| [numeric](#numeric) | ![](https://img.shields.io/badge/1/15-grey)![][p007] | | ![](https://img.shields.io/badge/0/9-grey)![][p000] | ![](https://img.shields.io/badge/0/4-grey)![][p000] | ![](https://img.shields.io/badge/1/1-grey)![][p100] | ![](https://img.shields.io/badge/0/5-grey)![][p000] |\n| [optional](#optional) | ![](https://img.shields.io/badge/7/7-grey)![][p100] | | ![](https://img.shields.io/badge/7/7-grey)![][p100] | | ![](https://img.shields.io/badge/1/1-grey)![][p100] | ![](https://img.shields.io/badge/0/1-grey)![][p000] |\n| [random](#random) | ![](https://img.shields.io/badge/1/1-grey)![][p100] | | | ![](https://img.shields.io/badge/1/1-grey)![][p100] | | |\n| [ranges](#ranges) | ![](https://img.shields.io/badge/76/82-grey)![][p093] | | | ![](https://img.shields.io/badge/60/60-grey)![][p100] | ![](https://img.shields.io/badge/29/36-grey)![][p081] | ![](https://img.shields.io/badge/1/1-grey)![][p100] |\n| [span](#span) | ![](https://img.shields.io/badge/4/4-grey)![][p100] | | | ![](https://img.shields.io/badge/4/4-grey)![][p100] | ![](https://img.shields.io/badge/1/1-grey)![][p100] | ![](https://img.shields.io/badge/1/1-grey)![][p100] |\n| [string_view](#string_view) | ![](https://img.shields.io/badge/7/7-grey)![][p100] | | ![](https://img.shields.io/badge/4/4-grey)![][p100] | ![](https://img.shields.io/badge/1/1-grey)![][p100] | ![](https://img.shields.io/badge/1/1-grey)![][p100] | ![](https://img.shields.io/badge/3/3-grey)![][p100] * |\n| [tuple](#tuple) | ![](https://img.shields.io/badge/7/8-grey)![][p088] | | ![](https://img.shields.io/badge/2/2-grey)![][p100] | | ![](https://img.shields.io/badge/2/2-grey)![][p100] | ![](https://img.shields.io/badge/5/6-grey)![][p083] |\n| [type_traits](#type_traits) | ![](https://img.shields.io/badge/17/26-grey)![][p065] | | ![](https://img.shields.io/badge/8/10-grey)![][p080] | ![](https://img.shields.io/badge/7/13-grey)![][p054] | ![](https://img.shields.io/badge/2/6-grey)![][p033] | ![](https://img.shields.io/badge/0/2-grey)![][p000] |\n| [utility](#utility) | ![](https://img.shields.io/badge/8/8-grey)![][p100] | | ![](https://img.shields.io/badge/2/2-grey)![][p100] | ![](https://img.shields.io/badge/2/2-grey)![][p100] | ![](https://img.shields.io/badge/3/3-grey)![][p100] | ![](https://img.shields.io/badge/1/1-grey)![][p100] |\n| [variant](#variant) | ![](https://img.shields.io/badge/9/9-grey)![][p100] | | ![](https://img.shields.io/badge/9/9-grey)![][p100] | | | ![](https://img.shields.io/badge/1/1-grey)![][p100] |\n| | | | | | | |\n| [atomic](#atomic) | ![](https://img.shields.io/badge/0/17-grey)![][p000] | | | ![](https://img.shields.io/badge/0/13-grey)![][p000] | | ![](https://img.shields.io/badge/0/4-grey)![][p000] |\n| [barrier](#barrier) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | ![](https://img.shields.io/badge/0/5-grey)![][p000] | | |\n| [charconv](#charconv) | ![](https://img.shields.io/badge/0/5-grey)![][p000] | | ![](https://img.shields.io/badge/0/14-grey)![][p000] | | ![](https://img.shields.io/badge/0/2-grey)![][p000] | |\n| [chrono](#chrono) | ![](https://img.shields.io/badge/0/47-grey)![][p000] | | ![](https://img.shields.io/badge/0/2-grey)![][p000] | ![](https://img.shields.io/badge/0/47-grey)![][p000] | | ![](https://img.shields.io/badge/0/2-grey)![][p000] |\n| [cmath](#cmath) | ![](https://img.shields.io/badge/0/22-grey)![][p000] | | ![](https://img.shields.io/badge/0/22-grey)![][p000] | | ![](https://img.shields.io/badge/0/22-grey)![][p000] | |\n| [compare](#compare) | | | | | | |\n| [coroutine](#coroutine) | N/A | | | | | |\n| [debugging](#debugging) | ![](https://img.shields.io/badge/0/3-grey)![][p000] | | | | | ![](https://img.shields.io/badge/0/3-grey)![][p000] |\n| [exception](#exception) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | |\n| [execution](#execution) | | | | | | |\n| [flat_map](#flat_map) | ![](https://img.shields.io/badge/0/4-grey)![][p000] | | | | ![](https://img.shields.io/badge/0/4-grey)![][p000] | |\n| [flat_set](#flat_set) | ![](https://img.shields.io/badge/0/2-grey)![][p000] | | | | ![](https://img.shields.io/badge/0/2-grey)![][p000] | |\n| [format](#format) | ![](https://img.shields.io/badge/0/24-grey)![][p000] | | | ![](https://img.shields.io/badge/0/16-grey)![][p000] | ![](https://img.shields.io/badge/0/15-grey)![][p000] | ![](https://img.shields.io/badge/0/10-grey)![][p000] |\n| [filesystem](#filesystem) | N/A | | | | | |\n| [hazard_pointer](#hazard_pointer) | ![](https://img.shields.io/badge/0/3-grey)![][p000] | | | | | ![](https://img.shields.io/badge/0/3-grey)![][p000] |\n| [inplace_vector](#inplace_vector) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | | | ![](https://img.shields.io/badge/0/1-grey)![][p000] |\n| [latch](#latch) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | |\n| [linalg](#linalg) | ![](https://img.shields.io/badge/0/51-grey)![][p000] | | | | | ![](https://img.shields.io/badge/0/51-grey)![][p000] |\n| [mdspan](#mdspan) | ![](https://img.shields.io/badge/0/11-grey)![][p000] | | | | ![](https://img.shields.io/badge/0/6-grey)![][p000] | ![](https://img.shields.io/badge/0/5-grey)![][p000] |\n| [memory_resource](#memory_resource) | | | | | | |\n| [mutex](#mutex) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | |\n| [new](#new) | ![](https://img.shields.io/badge/0/5-grey)![][p000] | | ![](https://img.shields.io/badge/0/4-grey)![][p000] | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | |\n| [print](#print) | ![](https://img.shields.io/badge/0/6-grey)![][p000] | | | | ![](https://img.shields.io/badge/0/6-grey)![][p000] | |\n| [rcu](#rcu) | ![](https://img.shields.io/badge/0/6-grey)![][p000] | | | | | ![](https://img.shields.io/badge/0/6-grey)![][p000] |\n| [semaphore](#semaphore) | ![](https://img.shields.io/badge/0/2-grey)![][p000] | | | ![](https://img.shields.io/badge/0/2-grey)![][p000] | | |\n| [shared_mutex](#shared_mutex) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | |\n| [stop_token](#stop_token) | ![](https://img.shields.io/badge/0/5-grey)![][p000] | | | ![](https://img.shields.io/badge/0/5-grey)![][p000] | | |\n| [string](#string) | ![](https://img.shields.io/badge/0/3-grey)![][p000] | | | ![](https://img.shields.io/badge/0/3-grey)![][p000] | ![](https://img.shields.io/badge/0/1-grey)![][p000] | ![](https://img.shields.io/badge/0/2-grey)![][p000] |\n| [source_location](#source_location) | N/A | | | | | |\n| [syncstream](#syncstream) | ![](https://img.shields.io/badge/0/3-grey)![][p000] | | | ![](https://img.shields.io/badge/0/3-grey)![][p000] | | |\n| [spanstream](#spanstream) | ![](https://img.shields.io/badge/0/4-grey)![][p000] | | | | ![](https://img.shields.io/badge/0/4-grey)![][p000] | |\n| [stacktrace](#stacktrace) | N/A | | | | | |\n| [text_encoding](#text_encoding) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | | | ![](https://img.shields.io/badge/0/1-grey)![][p000] |\n| [thread](#thread) | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | | ![](https://img.shields.io/badge/0/1-grey)![][p000] | | |\n| [version](#version) | | | | | | |\n\n-----\n\n## Detailed status\n\n### Features\nDescription\n* ![](https://img.shields.io/badge/C++XX-C++YY-CCEEFF): C++YY standard implemented in C++XX\n* ![](https://img.shields.io/badge/C++YY-red): C++YY standard, not implemented yet\n* If the implementation is impossible(i.e., needs compiler support / hardware info) it is marked as **N/A**\n* Some features are working in progress\n* **Introduced**: First introduced version\n* **Revision**: Behavior changed/updated version\n\n### Headers\n\n#### `\u003calgorithm\u003e`\n\n | | Introduced | Revision |\n |-------------------------------------|------------|------------|\n | `search` | ![][c98] | ![][c17no] |\n | `clamp` | ![][c17ok] | ![][c20ok] |\n | `for_each_n` | ![][c17ok] | ![][c20ok] |\n | `sample` | ![][c17no] | ![][c23no] |\n | `shift_left` | ![][c20ok] | |\n | `shift_right` | ![][c20ok] | |\n | `ranges::in_fun_result` | ![][c20ok] | |\n | `ranges::in_in_result` | ![][c20ok] | |\n | `ranges::in_out_result` | ![][c20ok] | |\n | `ranges::in_in_out_result` | ![][c20ok] | |\n | `ranges::in_out_out_result` | ![][c20ok] | |\n | `ranges::min_max_result` | ![][c20ok] | |\n | `ranges::in_found_result` | ![][c20ok] | |\n | `ranges::in_value_result` | ![][c23ok] | |\n | `ranges::out_value_result` | ![][c23ok] | |\n | `ranges::all_of` | ![][c20ok] | |\n | `ranges::any_of` | ![][c20ok] | |\n | `ranges::none_of` | ![][c20ok] | |\n | `ranges::for_each` | ![][c20ok] | |\n | `ranges::for_each_n` | ![][c20ok] | |\n | `ranges::count` | ![][c20ok] | ![][c26ok] |\n | `ranges::count_if` | ![][c20ok] | |\n | `ranges::mismatch` | ![][c20ok] | |\n | `ranges::find` | ![][c20ok] | ![][c26ok] |\n | `ranges::find_if` | ![][c20ok] | |\n | `ranges::find_if_not` | ![][c20ok] | |\n | `ranges::find_last` | ![][c23ok] | ![][c26ok] |\n | `ranges::find_last_if` | ![][c23ok] | |\n | `ranges::find_last_if_not` | ![][c23ok] | |\n | `ranges::find_end` | ![][c20ok] | |\n | `ranges::find_first_of` | ![][c20ok] | |\n | `ranges::adjacent_find` | ![][c20ok] | |\n | `ranges::search` | ![][c20ok] | |\n | `ranges::search_n` | ![][c20ok] | ![][c26ok] |\n | `ranges::contains` | ![][c23ok] | ![][c26ok] |\n | `ranges::contains_subrange` | ![][c23ok] | |\n | `ranges::starts_with` | ![][c23ok] | |\n | `ranges::ends_with` | ![][c23no] | |\n | `ranges::fold_left` | ![][c23ok] | ![][c26no] |\n | `ranges::fold_left_first` | ![][c23no] | |\n | `ranges::fold_right` | ![][c23no] | ![][c26no] |\n | `ranges::fold_right_last` | ![][c23no] | |\n | `ranges::fold_left_with_iter` | ![][c23no] | ![][c26no] |\n | `ranges::fold_left_first_with_iter` | ![][c23no] | |\n | `ranges::copy` | ![][c20ok] | |\n | `ranges::copy_if` | ![][c20ok] | |\n | `ranges::copy_n` | ![][c20ok] | |\n | `ranges::copy_backward` | ![][c20ok] | |\n | `ranges::move` | ![][c20no] | |\n | `ranges::move_backward` | ![][c20no] | |\n | `ranges::fill` | ![][c20ok] | ![][c26ok] |\n | `ranges::fill_n` | ![][c20ok] | ![][c26ok] |\n | `ranges::transform` | ![][c20no] | |\n | `ranges::generate` | ![][c20no] | |\n | `ranges::generate_n` | ![][c20no] | |\n | `ranges::remove` | ![][c20no] | ![][c26no] |\n | `ranges::remove_if` | ![][c20no] | |\n | `ranges::remove_copy` | ![][c20no] | ![][c26no] |\n | `ranges::remove_copy_if` | ![][c20no] | |\n | `ranges::replace` | ![][c20no] | ![][c26no] |\n | `ranges::replace_if` | ![][c20no] | ![][c26no] |\n | `ranges::replace_copy` | ![][c20no] | ![][c26no] |\n | `ranges::replace_copy_if` | ![][c20no] | ![][c26no] |\n | `ranges::swap_ranges` | ![][c20ok] | |\n | `ranges::reverse` | ![][c20no] | |\n | `ranges::reverse_copy` | ![][c20no] | |\n | `ranges::rotate` | ![][c20no] | |\n | `ranges::rotate_copy` | ![][c20no] | |\n | `ranges::shift_left` | ![][c23no] | |\n | `ranges::shift_right` | ![][c23no] | |\n | `ranges::sample` | ![][c20no] | |\n | `ranges::shuffle` | ![][c20no] | |\n | `ranges::unique` | ![][c20no] | |\n | `ranges::unique_copy` | ![][c20no] | |\n | `ranges::is_partitioned` | ![][c20no] | |\n | `ranges::partition` | ![][c20no] | |\n | `ranges::partition_copy` | ![][c20no] | |\n | `ranges::stable_partition` | ![][c20no] | ![][c26no] |\n | `ranges::partition_point` | ![][c20no] | |\n | `ranges::is_sorted` | ![][c20no] | |\n | `ranges::is_sorted_until` | ![][c20no] | |\n | `ranges::sort` | ![][c20ok] | |\n | `ranges::partial_sort` | ![][c20no] | |\n | `ranges::partial_sort_copy` | ![][c20no] | |\n | `ranges::stable_sort` | ![][c20no] | ![][c26no] |\n | `ranges::nth_element` | ![][c20no] | |\n | `ranges::lower_bound` | ![][c20no] | ![][c26no] |\n | `ranges::upper_bound` | ![][c20no] | ![][c26no] |\n | `ranges::binary_search` | ![][c20no] | ![][c26no] |\n | `ranges::equal_range` | ![][c20no] | ![][c26no] |\n | `ranges::merge` | ![][c20no] | |\n | `ranges::inplace_merge` | ![][c20no] | ![][c26no] |\n | `ranges::includes` | ![][c20no] | |\n | `ranges::set_difference` | ![][c20no] | |\n | `ranges::set_intersection` | ![][c20ok] | |\n | `ranges::set_symmetric_difference` | ![][c20no] | |\n | `ranges::set_union` | ![][c20no] | |\n | `ranges::is_heap` | ![][c20no] | |\n | `ranges::is_heap_until` | ![][c20no] | |\n | `ranges::make_heap` | ![][c20ok] | |\n | `ranges::push_heap` | ![][c20no] | |\n | `ranges::pop_heap` | ![][c20ok] | |\n | `ranges::sort_heap` | ![][c20ok] | |\n | `ranges::max` | ![][c20ok] | |\n | `ranges::max_element` | ![][c20ok] | |\n | `ranges::min` | ![][c20ok] | |\n | `ranges::min_element` | ![][c20ok] | |\n | `ranges::minmax` | ![][c20ok] | |\n | `ranges::minmax_element` | ![][c20ok] | |\n | `ranges::clamp` | ![][c20no] | |\n | `ranges::equal` | ![][c20ok] | |\n | `ranges::lexicographical_compare` | ![][c20ok] | |\n | `ranges::is_permutation` | ![][c20no] | |\n | `ranges::next_permutation` | ![][c20no] | |\n | `ranges::prev_permutation` | ![][c20no] | |\n\n#### `\u003cany\u003e`\n\n | | Introduced | Revision |\n |----------------|-------------|----------|\n | `any` | ![][c17ok]* | |\n | `bad_any_cast` | ![][c17ok] | |\n | `swap(any)` | ![][c17ok] | |\n | `make_any` | ![][c17ok] | |\n | `any_cast` | ![][c17ok] | |\n\n* Notes\n * `preview::any`\n * `preview::any` is an alias of `std::any` if using C++17 or later to prevent\n implicit construction of `std::any` from `preview::any` and vice-versa. \n See [any.h](include/preview/__any/any.h) for more detail.\n\n#### `\u003carray\u003e`\n\n | | Introduced | Revision |\n |------------|------------|----------|\n | `to_array` | ![][c20ok] | | \n\n#### `\u003catomic\u003e`\n\n | | Introduced | Revision |\n |-----------------------------|------------|----------|\n | `atomic_ref` | ![][c20no] | | \n | `atomic_signed_lock_free` | ![][c20no] | | \n | `atomic_unsigned_lock_free` | ![][c20no] | | \n | `atomic_wait` | ![][c20no] | | \n | `atomic_wait_explicit` | ![][c20no] | | \n | `atomic_notify_one` | ![][c20no] | | \n | `atomic_notify_all` | ![][c20no] | | \n | `atomic_flag_test` | ![][c20no] | | \n | `atomic_flag_test_explicit` | ![][c20no] | | \n | `atomic_flag_wait` | ![][c20no] | | \n | `atomic_flag_wait_explicit` | ![][c20no] | | \n | `atomic_flag_notify_one` | ![][c20no] | | \n | `atomic_flag_notifly_all` | ![][c20no] | | \n | `atomic_fetch_max` | ![][c26no] | | \n | `atomic_fetch_max_explicit` | ![][c26no] | | \n | `atomic_fetch_min` | ![][c26no] | | \n | `atomic_fetch_min_explicit` | ![][c26no] | | \n\n#### `\u003cbarrier\u003e`\n\n | | Introduced | Revision |\n |-----------|------------|----------|\n | `barrier` | ![][c20no] | |\n\n#### `\u003cbit\u003e`\n\n | | Introduced | Revision |\n |------------------|------------|----------|\n | `endian` | ![][c20no] | |\n | `bit_cast` | ![][c20ok] | |\n | `byteswap` | ![][c23ok] | |\n | `has_single_bit` | ![][c20no] | |\n | `bit_ceil` | ![][c20no] | |\n | `bit_floor` | ![][c20no] | |\n | `bit_width` | ![][c20no] | |\n | `rotl` | ![][c20no] | |\n | `rotr` | ![][c20no] | |\n | `countl_zero` | ![][c20no] | |\n | `countl_one` | ![][c20no] | |\n | `countr_zero` | ![][c20no] | |\n | `countr_one` | ![][c20no] | |\n | `popcount` | ![][c20no] | |\n\n#### `\u003ccharconv\u003e`\n\n | | Introduced | Revision |\n |---------------------|------------|------------|\n | `chars_format` | ![][c17no] | |\n | `from_chars_result` | ![][c17no] | |\n | `to_chars_result` | ![][c17no] | |\n | `from_chars` | ![][c17no] | ![][c23no] |\n | `to_chars` | ![][c17no] | ![][c23no] |\n\n#### `\u003cchrono\u003e`\n\n | | Introduced | Revision |\n |---------------------------|------------|----------------------------------|\n | `std::chrono::duration` | ![][c11] | ![][c17no] ![][c20no] ![][c26no] |\n | `std::chrono::time_point` | ![][c11] | ![][c17no] ![][c20no] ![][c26no] |\n | `clock_time_conversion` | ![][c20no] | |\n | `is_clock` | ![][c20no] | |\n | `utc_clock` | ![][c20no] | |\n | `tai_clock` | ![][c20no] | |\n | `gps_clock` | ![][c20no] | |\n | `file_clock` | ![][c20no] | |\n | `local_t` | ![][c20no] | |\n | `last_spec` | ![][c20no] | |\n | `day` | ![][c20no] | |\n | `month` | ![][c20no] | |\n | `year` | ![][c20no] | |\n | `weekday` | ![][c20no] | |\n | `weekday_indexed` | ![][c20no] | |\n | `weekday_last` | ![][c20no] | |\n | `month_day` | ![][c20no] | |\n | `month_day_last` | ![][c20no] | |\n | `month_weekday` | ![][c20no] | |\n | `month_weekday_last` | ![][c20no] | |\n | `year_month` | ![][c20no] | |\n | `year_month_day` | ![][c20no] | |\n | `year_month_day_last` | ![][c20no] | |\n | `year_month_weekday` | ![][c20no] | |\n | `year_month_weekday_last` | ![][c20no] | |\n | `hh_mm_ss` | ![][c20no] | |\n | `tzdb` | ![][c20no] | |\n | `tzdb_list` | ![][c20no] | |\n | `tzdb_zone` | ![][c20no] | |\n | `get_tzdb` | ![][c20no] | |\n | `get_tzdb_list` | ![][c20no] | |\n | `reload_tzdb` | ![][c20no] | |\n | `remote_version` | ![][c20no] | |\n | `locate_zone` | ![][c20no] | |\n | `sys_info` | ![][c20no] | |\n | `local_info` | ![][c20no] | |\n | `choose` | ![][c20no] | |\n | `zoned_traits` | ![][c20no] | |\n | `zoned_time` | ![][c20no] | |\n | `time_zone_link` | ![][c20no] | |\n | `nonexistent_local_time` | ![][c20no] | |\n | `ambiguous_local_time` | ![][c20no] | |\n | `leap_second` | ![][c20no] | |\n | `leap_second_info` | ![][c20no] | |\n | `get_leap_second_info` | ![][c20no] | |\n | `is_am`\u003cbr/\u003e`is_pm` | ![][c20no] | |\n | `make_12`\u003cbr/\u003e`make_24` | ![][c20no] | |\n\n#### `\u003ccmath\u003e`\n\n | | Introduced | Revision |\n |------------------|------------|------------|\n | `assoc_laguerre` | ![][c17no] | ![][c23no] |\n | `assoc_legendre` | ![][c17no] | ![][c23no] |\n | `beta` | ![][c17no] | ![][c23no] |\n | `comp_ellint_1` | ![][c17no] | ![][c23no] |\n | `comp_ellint_2` | ![][c17no] | ![][c23no] |\n | `comp_ellint_3` | ![][c17no] | ![][c23no] |\n | `cyl_bessel_i` | ![][c17no] | ![][c23no] |\n | `cyl_bessel_j` | ![][c17no] | ![][c23no] |\n | `cyl_bessel_k` | ![][c17no] | ![][c23no] |\n | `cyl_neumann` | ![][c17no] | ![][c23no] |\n | `ellint_1` | ![][c17no] | ![][c23no] |\n | `ellint_2` | ![][c17no] | ![][c23no] |\n | `ellint_3` | ![][c17no] | ![][c23no] |\n | `expint` | ![][c17no] | ![][c23no] |\n | `hermite` | ![][c17no] | ![][c23no] |\n | `legendre` | ![][c17no] | ![][c23no] |\n | `laguerre` | ![][c17no] | ![][c23no] |\n | `riemann_zeta` | ![][c17no] | ![][c23no] |\n | `sph_bessel` | ![][c17no] | ![][c23no] |\n | `sph_legendre` | ![][c17no] | ![][c23no] |\n | `sph_neumann` | ![][c17no] | ![][c23no] |\n | `hypot(x, y, z)` | ![][c17no] | ![][c26no] |\n\n#### `\u003ccompare\u003e`\n N/A\n\n#### `\u003cconcepts\u003e`\n\n | | Introduced | Revision |\n |----------------------------|------------|------------|\n | `same_as` | ![][c20ok] | |\n | `derived_from` | ![][c20ok] | |\n | `convertible_to` | ![][c20ok] | |\n | `common_reference_with` | ![][c20ok] | |\n | `common_with` | ![][c20ok] | |\n | `integral` | ![][c20ok] | |\n | `signed_integral` | ![][c20ok] | |\n | `unsigned_integral` | ![][c20ok] | |\n | `floating_point` | ![][c20ok] | |\n | `assignable_from` | ![][c20ok] | |\n | `swappable` | ![][c20ok] | |\n | `destructible` | ![][c20ok] | |\n | `constructible_from` | ![][c20ok] | |\n | `default_initializable` | ![][c20ok] | |\n | `move_constructible` | ![][c20ok] | |\n | `copy_constructible` | ![][c20ok] | |\n | `equality_comparable` | ![][c20ok] | |\n | `equality_comparable_with` | ![][c20ok] | ![][c23ok] |\n | `totally_ordered` | ![][c20ok] | |\n | `movable` | ![][c20ok] | |\n | `copyable` | ![][c20ok] | |\n | `semiregular` | ![][c20ok] | |\n | `regular` | ![][c20ok] | |\n | `invocable` | ![][c20ok] | |\n | `regular_invocable` | ![][c20ok] | |\n | `predicate` | ![][c20ok] | |\n | `relation` | ![][c20ok] | |\n | `equivalence_relation` | ![][c20ok] | |\n | `strict_weak_order` | ![][c20ok] | |\n | `ranges::swap` | ![][c20ok] | |\n\n#### `\u003ccoroutine\u003e`\n N/A\n\n#### `\u003ccstddef\u003e`\n\n | | Introduced | Revision |\n |--------------|------------|----------|\n | `byte` | ![][c17ok] | |\n | `to_integer` | ![][c17ok] | |\n\n#### `\u003cdebugging\u003e`\n\n | | Introduced | Revision |\n |---------------------------|------------|----------|\n | `breakpoint` | ![][c26no] | |\n | `breakpoint_if_debugging` | ![][c26no] | |\n | `is_debugger_present` | ![][c26no] | |\n\n#### `\u003cexception\u003e`\n\n | | Introduced | Revision |\n |-----------------------|------------------|----------|\n | `uncaught_exceptions` | ![][c17no] (N/A) | |\n\n#### `\u003cexpected\u003e`\n\n | | Introduced | Revision |\n |-----------------------------|------------|----------|\n | `expected` | ![][c23ok] | |\n | `unexpected` | ![][c23ok] | |\n | `bad_expected_access` | ![][c23ok] | |\n | `unexpect`\u003cbr/\u003e`unexpect_t` | ![][c23ok] | |\n\n#### `\u003cexecution\u003e`\n N/A\n\n#### `\u003cflat_map\u003e`\n\n | | Introduced | Revision |\n |-----------------------------------------------|------------|----------|\n | `flat_map` | ![][c23no] | |\n | `flat_multimap` | ![][c23no] | |\n | `sorted_unique`\u003cbr/\u003e`sorted_unique_t` | ![][c23no] | |\n | `sorted_equivalent`\u003cbr/\u003e`sorted_equivalent_t` | ![][c23no] | |\n\n#### `\u003cflat_set\u003e`\n\n | | Introduced | Revision |\n |-----------------|------------|----------|\n | `flat_set` | ![][c23no] | |\n | `flat_multiset` | ![][c23no] | |\n\n#### `\u003cformat\u003e`\n\n | | Introduced | Revision |\n |--------------------------------------------|------------|-----------------------|\n | `formatter` | ![][c20no] | ![][c23no] |\n | `basic_format_parse_context` | ![][c20no] | ![][c26no] |\n | `basic_format_context` | ![][c20no] | |\n | `basic_format_arg` | ![][c20no] | ![][c26no] |\n | `basic_format_args` | ![][c20no] | |\n | `basic_format_string` | ![][c20no] | ![][c23no] ![][c26no] |\n | `format_error` | ![][c20no] | |\n | `format` | ![][c20no] | ![][c23no] ![][c26no] |\n | `format_to` | ![][c20no] | ![][c23no] ![][c26no] |\n | `format_to_n` | ![][c20no] | ![][c23no] ![][c26no] |\n | `formatted_size` | ![][c20no] | ![][c23no] ![][c26no] |\n | `vformat` | ![][c20no] | ![][c23no] ![][c26no] |\n | `vformat_to` | ![][c20no] | ![][c23no] ![][c26no] |\n | ~~`visit_format_arg`~~ | ![][c20no] | deprecated in C++26 |\n | `make_format_args` | ![][c20no] | |\n | `make_wformat_args` | ![][c20no] | |\n | `formattable` | ![][c23no] | |\n | `range_format` | ![][c23no] | |\n | `range_formatter` | ![][c23no] | |\n | `formatter\u003cpair-or-tuple\u003e` | ![][c23no] | |\n | `formatter\u003crange\u003e` | ![][c23no] | |\n | `format_kind` | ![][c23no] | |\n | `enable_nonlocking_formatter_optimization` | ![][c23no] | |\n | `runtime_format` | ![][c26no] | |\n\n#### `\u003cfilesystem\u003e`\n N/A\n\n#### `\u003cfunctional\u003e`\n\n | | Introduced | Revision |\n |---------------------------------|------------|-----------------------------------------------|\n | `reference_wrapper` | | ![][c17ok] ![][c20ok] ![][c23ok] ![][c26ok] * |\n | `default_searcher` | ![][c17ok] | ![][c20ok] |\n | `boyer_moore_searcher` | ![][c17no] | |\n | `boyer_moore_horspool_searcher` | ![][c17no] | |\n | `invoke` | ![][c17ok] | |\n | `not_fn` | ![][c17ok] | ![][c26ok] |\n | `bind_front` | ![][c20ok] | ![][c26ok17] |\n | `identity` | ![][c20ok] | |\n | `unwrap_reference` | ![][c20ok] | |\n | `unwrap_ref_decay` | ![][c20ok] | |\n | `ranges::equal_to` | ![][c20ok] | |\n | `ranges::not_equal_to` | ![][c20ok] | |\n | `ranges::greater` | ![][c20ok] | |\n | `ranges::less` | ![][c20ok] | |\n | `ranges::greater_equal` | ![][c20ok] | |\n | `ranges::less_equal` | ![][c20ok] | |\n | `compare_three_way` | ![][c20no] | |\n | `ranges::three_way` | ![][c20no] | |\n | `invoke_r` | ![][c23ok] | |\n | `bind_back` | ![][c23ok] | ![][c26ok17] |\n | `move_only_function` | ![][c23no] | |\n | `copyable_function` | ![][c26no] | |\n | `function_ref` | ![][c26no] | |\n\n* Notes\n * `reference_wrapper`\n * Non-standard member function `operator*()` is defined _**only for the purpose of mixed use with**_ `std::invoke`.\n * Before C++20, `preview::reference_wrapper` cannot be used in deduced context of `std::reference_wrapper`. In sucn\n case, non-standard member function `to_std()` can be used.\n ```c++\n template\u003ctypename T\u003e\n void foo(std::reference_wrapper\u003cT\u003e x) {}\n \n int main() {\n int x = 10;\n auto ref = preview::ref(x);\n foo(ref); // Compile error before C++20\n foo(ref.to_std());\n \n std::cout \u003c\u003c std::boolalpha \u003c\u003c (ref == 10) \u003c\u003c std::endl;\n }\n ```\n\n\n#### `\u003chazard_pointer\u003e`\n\n | | Introduced | Revision |\n |---------------------------|------------|----------|\n | `hazard_pointer_obj_base` | ![][c26no] | |\n | `hazard_pointer` | ![][c26no] | |\n | `make_hazard_pointer` | ![][c26no] | |\n\n#### `\u003cinplace_vector\u003e`\n\n | | Introduced | Revision |\n |-----------------------|------------|----------|\n | `inplace_vector` | ![][c26no] | |\n\n#### `\u003citerator\u003e`\n\n | | Introduced | Revision |\n |-----------------------------------------------------|--------------|-------------|\n | `contiguous_iterator_tag` | ![][c20ok] * | |\n | `indirectly_readable` | ![][c20ok] | |\n | `indirectly_writable` | ![][c20ok] | |\n | `weakly_incrementable` | ![][c20ok] | |\n | `incrementable` | ![][c20ok] | |\n | `input_or_output_iterator` | ![][c20ok] | |\n | `sentinel_for` | ![][c20ok] | |\n | `sized_sentinel_for` | ![][c20ok] | |\n | `input_iterator` | ![][c20ok] | |\n | `output_iterator` | ![][c20ok] | |\n | `forward_iterator` | ![][c20ok] | |\n | `bidirectional_iterator` | ![][c20ok] | |\n | `random_access_iterator` | ![][c20ok] | |\n | `contiguous_iterator` | ![][c20ok] * | |\n | `indirectly_unary_invocable` | ![][c20ok] | |\n | `indirectly_regular_unary_invocable` | ![][c20ok] | |\n | `indirect_unary_predicate` | ![][c20ok] | |\n | `indirect_binary_predicate` | ![][c20ok] | |\n | `indirect_equivalence_relation` | ![][c20ok] | |\n | `indirect_strict_weak_order` | ![][c20ok] | |\n | `indirectly_movable` | ![][c20ok] | |\n | `indirectly_movable_storable` | ![][c20ok] | |\n | `indirectly_copyable` | ![][c20ok] | |\n | `indirectly_copyable_storable` | ![][c20ok] | |\n | `indirectly_swappable` | ![][c20ok] | |\n | `indirectly_comparable` | ![][c20ok] | |\n | `permutable` | ![][c20ok] | |\n | `mergeable` | ![][c20ok] | |\n | `sortable` | ![][c20ok] | |\n | `indirect_result_t` | ![][c20ok] | |\n | `projected` | ![][c20ok] | ![][c26ok]* |\n | `projected_value_t` | ![][c26ok] | |\n | `incrementable_traits` | ![][c20ok] | |\n | `indirectly_readable_traits` | ![][c20ok] | |\n | `iter_value_t`\u003cbr/\u003e`iter_reference_t` | ![][c20ok] | |\n | `iter_const_reference_t` | ![][c23ok] | |\n | `iter_difference_t` | ![][c20ok] | |\n | `iter_rvalue_reference_t` | ![][c20ok] | |\n | `iter_common_reference_t` | ![][c20ok] | |\n | `iterator_traits` | ![][c98] | ![][c20ok] |\n | `move_sentinel` | ![][c20ok] | |\n | `basic_const_iterator` | ![][c23ok] | |\n | `const_iterator` | ![][c23ok] | |\n | `const_sentinel` | ![][c23ok] | |\n | `common_iterator` | ![][c20ok] | |\n | `default_sentinel_t`\u003cbr/\u003e`default_sentinel` | ![][c20ok] | |\n | `counted_iterator` | ![][c20ok] | |\n | `unreachable_sentinel_t`\u003cbr/\u003e`unreachable_sentinel` | ![][c20ok] | |\n | `iter_move` | ![][c20ok] | |\n | `iter_swap` | ![][c20ok] | |\n | `make_const_iterator`\u003cbr/\u003e`make_const_sentinel` | ![][c23ok] | |\n | `ranges::advance` | ![][c20ok] | |\n | `ranges::distance` | ![][c20ok] | |\n | `ranges::next` | ![][c20ok] | |\n | `ranges::prev` | ![][c20ok] | |\n | `size(C)` | ![][c17ok] | ![][c20ok] |\n | `ssize(C)` | ![][c20ok] | |\n | `empty(C)` | ![][c17no] | ![][c20no] |\n | `data(C)` | ![][c17no] | |\n\n * Notes\n * `contiguous_iterator_tag`\n * Alias to `std::contiguous_iterator_tag` if defined, `preview::detail::pseudo_contiguous_iterator_tag` otherwise.\n \u003cbr/\u003e\u003cbr/\u003e\n * `contiguous_iterator\u003cI\u003e` \n * May incorrectly evaluates to `true` for some `random_access_iterator` if \n `I::iterator_category` does not satisfy `derived_from\u003ccontiguous_iterator_tag\u003e`(typically before C++20)\n * Following pre-C++20 iterators explicitly evaluates to `false`\n * `std::vector\u003cbool\u003e::xxx_iterator`\n * `std::deque\u003cT\u003e::xxx_iterator`\n \u003cbr/\u003e\u003cbr/\u003e\n * `projected`\n * Indirect layer doesn't work without using concepts. \n Check `preview::projectable` before using `preview::projected` directly.\n\n#### `\u003clatch\u003e`\n\n | | Introduced | Revision |\n |---------|------------|----------|\n | `latch` | ![][c20no] | |\n\n#### `\u003clinalg\u003e`\n\n | | Introduced | Revision |\n |---------------------------------------------------------|------------|----------|\n | `layout_blas_packed` | ![][c26no] | |\n | `scaled_accessor` | ![][c26no] | |\n | `conjugated_accessor` | ![][c26no] | |\n | `layout_transpose` | ![][c26no] | |\n | `column_major`\u003cbr/\u003e`column_major_t` | ![][c26no] | |\n | `row_major`\u003cbr/\u003e`row_major_t` | ![][c26no] | |\n | `upper_triangle`\u003cbr/\u003e`upper_triangle_t` | ![][c26no] | |\n | `lower_triangle`\u003cbr/\u003e`lower_triangle_t` | ![][c26no] | |\n | `implicit_unit_diagonal`\u003cbr/\u003e`implicit_unit_diagonal_t` | ![][c26no] | |\n | `explicit_unit_diagonal`\u003cbr/\u003e`explicit_unit_diagonal_t` | ![][c26no] | |\n | `scaled` | ![][c26no] | |\n | `conjugated` | ![][c26no] | |\n | `transposed` | ![][c26no] | |\n | `conjugated_transposed` | ![][c26no] | |\n | `setup_givens_rotation` | ![][c26no] | |\n | `apply_givens_rotation` | ![][c26no] | |\n | `swap_elements` | ![][c26no] | |\n | `scale` | ![][c26no] | |\n | `copy` | ![][c26no] | |\n | `add` | ![][c26no] | |\n | `dot`\u003cbr/\u003e`dotc` | ![][c26no] | |\n | `vector_sum_of_squares` | ![][c26no] | |\n | `vector_two_norm` | ![][c26no] | |\n | `vector_abs_sum` | ![][c26no] | |\n | `vector_idx_abs_max` | ![][c26no] | |\n | `matrix_frob_norm` | ![][c26no] | |\n | `matrix_one_norm` | ![][c26no] | |\n | `matrix_inf_norm` | ![][c26no] | |\n | `matrix_vector_product` | ![][c26no] | |\n | `symmetric_matrix_vector_product` | ![][c26no] | |\n | `hermitian_matrix_vector_product` | ![][c26no] | |\n | `triangular_matrix_vector_product` | ![][c26no] | |\n | `triangular_matrix_vector_solve` | ![][c26no] | |\n | `matrix_rank_1_update` | ![][c26no] | |\n | `matrix_rank_1_update_c` | ![][c26no] | |\n | `symmetric_matrix_rank_1_update` | ![][c26no] | |\n | `hermitian_matrix_rank_1_update` | ![][c26no] | |\n | `symmetric_matrix_rank_2_update` | ![][c26no] | |\n | `hermitian_matrix_rank_2_update` | ![][c26no] | |\n | `matrix_product` | ![][c26no] | |\n | `symmetric_matrix_product` | ![][c26no] | |\n | `hermitian_matrix_product` | ![][c26no] | |\n | `triangular_matrix_product` | ![][c26no] | |\n | `triangular_matrix_left_product` | ![][c26no] | |\n | `triangular_matrix_right_product` | ![][c26no] | |\n | `symmetric_matrix_rank_k_update` | ![][c26no] | |\n | `hermitian_matrix_rank_k_update` | ![][c26no] | |\n | `symmetric_matrix_rank_2k_update` | ![][c26no] | |\n | `hermitian_matrix_rank_2k_update` | ![][c26no] | |\n | `triangular_matrix_matrix_left_solve` | ![][c26no] | |\n | `triangular_matrix_matrix_right_solve` | ![][c26no] | |\n\n#### `\u003cmdspan\u003e`\n\n | | Introduced | Revision |\n |-----------------------------------|------------|----------|\n | `mdspan` | ![][c23no] | |\n | `extents` | ![][c23no] | |\n | `layout_left` | ![][c23no] | |\n | `layout_right` | ![][c23no] | |\n | `layout_stride` | ![][c23no] | |\n | `layout_stride` | ![][c23no] | |\n | `submdspan` | ![][c26no] | |\n | `submdspan_extents` | ![][c26no] | |\n | `strided_slice` | ![][c26no] | |\n | `submdspan_mapping_result` | ![][c26no] | |\n | `full_extent`\u003cbr/\u003e`full_extent_t` | ![][c26no] | |\n\n#### `\u003cmemory\u003e`\n\n | | Introduced | Revision |\n |---------------------------------------------------|-------------|------------|\n | `pointer_traits` | ![][c11] | ![][c20ok] |\n | `aligned_alloc` | ![][c17no] | |\n | `destroy_at` | ![][c17ok] | ![][c20ok] |\n | `destroy` | ![][c17ok] | ![][c20ok] |\n | `destroy_n` | ![][c17ok] | ![][c20ok] |\n | `xxx_pointer_cast` | ![][c17ok] | ![][c20ok] |\n | `uninitialized_default_construct` | ![][c17no] | ![][c20no] |\n | `uninitialized_default_construct_n` | ![][c17no] | ![][c20no] |\n | `uninitialized_move` | ![][c17no] | ![][c20no] |\n | `uninitialized_move_n` | ![][c17no] | ![][c20no] |\n | `uninitialized_value_construct` | ![][c17no] | |\n | `uninitialized_value_construct_n` | ![][c17no] | |\n | `atomic\u003cshared_ptr\u003e` | ![][c20no] | |\n | `atomic\u003cunique_ptr\u003e` | ![][c20no] | |\n | `assume_aligned` | ![][c20no] | |\n | `construct_at` | ![][c20ok] | |\n | `make_shared_for_overwrite` | ![][c20no] | |\n | `make_unique_for_overwrite` | ![][c20no] | |\n | `allocate_shared_for_overwrite` | ![][c20no] | |\n | `to_address` | ![][c20ok]* | |\n | `uses_allocator_construction_args` | ![][c20ok] | |\n | `make_obj_using_allocator` | ![][c20ok] | |\n | `uninitialized_construct_using_allocator` | ![][c20no] | |\n | `operator\u003c\u003c(std::unique_ptr)` | ![][c20no] | |\n | `ranges::construct_at` | ![][c20no] | |\n | `ranges::destroy` | ![][c20no] | |\n | `ranges::destroy_n` | ![][c20no] | |\n | `ranges::destroy_at` | ![][c20no] | |\n | `ranges::uninitialized_copy` | ![][c20no] | |\n | `ranges::uninitialized_copy_n` | ![][c20no] | |\n | `ranges::uninitialized_fill` | ![][c20no] | |\n | `ranges::uninitialized_fill_n` | ![][c20no] | |\n | `ranges::uninitialized_move` | ![][c20no] | |\n | `ranges::uninitialized_move_n` | ![][c20no] | |\n | `ranges::uninitialized_default_construct` | ![][c20no] | |\n | `ranges::uninitialized_default_construct_n` | ![][c20no] | |\n | `ranges::uninitialized_value_construct` | ![][c20no] | |\n | `ranges::uninitialized_value_construct_n` | ![][c20no] | |\n | `allocation_result` | ![][c23no] | |\n | `inout_ptr`\u003cbr/\u003e`inout_ptr_t` | ![][c23no] | |\n | `out_ptr`\u003cbr/\u003e`out_ptr_t` | ![][c23no] | |\n | `start_lifetime_as`\u003cbr/\u003e`start_lifetime_as_array` | ![][c23no] | |\n | `owner_hash` | ![][c26no] | |\n | `owner_equal` | ![][c26no] | |\n\n* Notes\n * `to_address`\n * If `std::pointer_traits::to_address` is available, it is used before `preview::pointer_traits::to_address`.\n * ⚠️ `std::pointer_traits::to_address` is not sfinae-friendly until MSVC 2022, so not used.\n\n#### `\u003cmemory_resource\u003e`\n N/A\n\n#### `\u003cmutex\u003e`\n\n | | Introduced | Revision |\n |---------------|------------|----------|\n | `scoped_lock` | ![][c17no] | |\n\n#### `\u003cnew\u003e`\n\n | | Introduced | Revision |\n |----------------------------------------------|------------|----------|\n | `align_val_t` | ![][c17no] | |\n | `hardware_destructive_interference_size` | ![][c17no] | |\n | `hardware_constructive_interference_size` | ![][c17no] | |\n | `launder` | ![][c17no] | |\n | `destroying_delete`\u003cbr\u003e`destroying_delete_t` | ![][c20no] | |\n\n#### `\u003cnumbers\u003e`\n\n | | Introduced | Revision |\n |--------------|------------|----------|\n | `e` | ![][c20ok] | |\n | `log2e` | ![][c20ok] | |\n | `log10e` | ![][c20ok] | |\n | `pi` | ![][c20ok] | |\n | `inv_pi` | ![][c20ok] | |\n | `inv_sqrtpi` | ![][c20ok] | |\n | `ln2` | ![][c20ok] | |\n | `ln10` | ![][c20ok] | |\n | `sqrt2` | ![][c20ok] | |\n | `sqrt3` | ![][c20ok] | |\n | `inv_sqrt3` | ![][c20ok] | |\n | `egamma` | ![][c20ok] | |\n | `phi` | ![][c20ok] | |\n\n#### `\u003cnumeric\u003e`\n\n | | Introduced | Revision |\n |----------------------------|------------|------------|\n | `exclusive_scan` | ![][c17no] | ![][c20no] |\n | `transform_exclusive_scan` | ![][c17no] | ![][c20no] |\n | `inclusive_scan` | ![][c17no] | ![][c20no] |\n | `transform_inclusive_scan` | ![][c17no] | ![][c20no] |\n | `gcd` | ![][c17no] | |\n | `lcm` | ![][c17no] | |\n | `reduce` | ![][c17no] | |\n | `transform_reduce` | ![][c17no] | |\n | `midpoint` | ![][c17no] | |\n | `ranges::iota` | ![][c23ok] | |\n | `add_sat` | ![][c26no] | |\n | `sub_sat` | ![][c26no] | |\n | `mul_sat` | ![][c26no] | |\n | `div_sat` | ![][c26no] | |\n | `saturate_cast` | ![][c26no] | |\n\n#### `\u003cprint\u003e`\n\n | | Introduced | Revision |\n |------------------------------|------------|----------|\n | `print` | ![][c23no] | |\n | `println` | ![][c23no] | |\n | `vprint_unicode` | ![][c23no] | |\n | `vprint_unicode_buffered` | ![][c23no] | |\n | `vprint_nonunicode` | ![][c23no] | |\n | `vprint_nonunicode_buffered` | ![][c23no] | |\n\n#### `\u003coptional\u003e`\n\n | | Introduced | Revision |\n |-----------------------|-------------|------------------------|\n | `optional` | ![][c17ok] | ![][c23ok] ![][c26ok]* |\n | `bad_optional_access` | ![][c17ok] | |\n | `std::hash\u003coptional\u003e` | ![][c17ok] | |\n | `nullopt` | ![][c17ok]* | |\n | `nullopt_t` | ![][c17ok]* | |\n | `swap(optional)` | ![][c17ok] | |\n | `make_optional` | ![][c17ok] | |\n\n* Notes\n * `nullopt`, `nullopt_t`\n * `std::nullopt` is used if available, `preview::nullopt` otherwise.\n * C++26\n * [P3168 (R2)](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p3168r2.html)\n\n#### `\u003crandom\u003e`\n\n | | Introduced | Revision |\n |--------------------------------|------------|----------|\n | `uniform_random_bit_generator` | ![][c20ok] | |\n\n#### `\u003cranges\u003e`\n\n | | Introduced | Revision |\n |-------------------------------------------------------------------|--------------|------------|\n | `ranges::range` | ![][c20ok] | |\n | `ranges::borrowed_range` | ![][c20ok] | |\n | `ranges::sized_range` | ![][c20ok] | |\n | `ranges::view` | ![][c20ok] | |\n | `ranges::input_range` | ![][c20ok] | |\n | `ranges::output_range` | ![][c20ok] | |\n | `ranges::forward_range` | ![][c20ok] | |\n | `ranges::bidirectional_range` | ![][c20ok] | |\n | `ranges::random_access_range` | ![][c20ok] | |\n | `ranges::contiguous_range` | ![][c20ok] | |\n | `ranges::common_range` | ![][c20ok] | |\n | `ranges::viewable_range` | ![][c20ok] | |\n | `ranges::constant_range` | ![][c23ok] | |\n | `ranges::to` | ![][c23ok] * | |\n | `ranges::iterator_t` | ![][c20ok] | |\n | `ranges::const_iterator_t` | ![][c23ok] | |\n | `ranges::sentinel_t` | ![][c20ok] | |\n | `ranges::const_sentinel_t` | ![][c23ok] | |\n | `ranges::range_difference_t` | ![][c20ok] | |\n | `ranges::range_size_t` | ![][c20ok] | |\n | `ranges::range_value_t` | ![][c20ok] | |\n | `ranges::range_refernce_t` | ![][c20ok] | |\n | `ranges::range_const_reference_t` | ![][c23ok] | |\n | `ranges::range_rvalue_reference_t` | ![][c20ok] | |\n | `ranges::range_common_reference_t` | ![][c20ok] | |\n | `ranges::view_interface` | ![][c20ok] | ![][c23ok] |\n | `ranges::subrange` | ![][c20ok] | ![][c23ok] |\n | `ranges::dangling` | ![][c20ok] | |\n | `ranges::borrowed_iterator_t` | ![][c20ok] | |\n | `ranges::borrowed_subrange_t` | ![][c20ok] | |\n | `ranges::range_adaptor_closure` | ![][c23ok] | |\n | `ranges::empty_view`\u003cbr/\u003e`views::empty` | ![][c20ok] | |\n | `ranges::single_view`\u003cbr/\u003e`views::single` | ![][c20ok] | |\n | `ranges::iota_view`\u003cbr/\u003e`views::iota` | ![][c20ok] | |\n | `ranges::iota_view`\u003cbr/\u003e`views::iota` | ![][c20ok] | |\n | `ranges::basic_istream_view`\u003cbr/\u003e`views::istream` | ![][c20ok] | |\n | `ranges::repeat_view`\u003cbr/\u003e`views::repeat` | ![][c23ok] | |\n | `ranges::cartesian_product_view`\u003cbr/\u003e`views::cartesian_product` | ![][c23ok] | |\n | `views::all_t`\u003cbr/\u003e`views::all` | ![][c20ok] | |\n | `ranges::ref_view` | ![][c20ok] | |\n | `ranges::owning_view` | ![][c20ok] | |\n | `ranges::filter_view`\u003cbr/\u003e`views::filter` | ![][c20ok] | |\n | `ranges::transform_view`\u003cbr/\u003e`views::transform` | ![][c20ok] | ![][c23ok] |\n | `ranges::take_view`\u003cbr/\u003e`views::take` | ![][c20ok] | |\n | `ranges::take_while_view`\u003cbr/\u003e`views::take_while` | ![][c20ok] | |\n | `ranges::drop_view`\u003cbr/\u003e`views::drop` | ![][c20ok] | ![][c23ok] |\n | `ranges::drop_while_view`\u003cbr/\u003e`views::drop_while` | ![][c20ok] | |\n | `ranges::join_view`\u003cbr/\u003e`views::join` | ![][c20ok] | |\n | `ranges::lazy_split_view`\u003cbr/\u003e`views::lazy_split` | ![][c20ok] | |\n | `ranges::split_view`\u003cbr/\u003e`views::split` | ![][c20ok] | |\n | `views::counted` | ![][c20ok] | |\n | `ranges::common_view`\u003cbr/\u003e`views::common` | ![][c20ok] | |\n | `ranges::reverse_view`\u003cbr/\u003e`views::reverse` | ![][c20ok] | |\n | `ranges::as_const_view`\u003cbr/\u003e`views::as_const` | ![][c23ok] | |\n | `ranges::as_rvalue_view`\u003cbr/\u003e`views::as_rvalue` | ![][c23no] | |\n | `ranges::elements_view`\u003cbr/\u003e`views::elements` | ![][c20ok] | |\n | `ranges::keys_view`\u003cbr/\u003e`views::keys` | ![][c20ok] | |\n | `ranges::values_view`\u003cbr/\u003e`views::values` | ![][c20ok] | |\n | `ranges::enumerate_view`\u003cbr/\u003e`views::enumerate` | ![][c23ok] | |\n | `ranges::zip_view`\u003cbr/\u003e`views::zip` | ![][c23ok] | |\n | `ranges::zip_transform_view`\u003cbr/\u003e`views::zip_transform` | ![][c23ok] | |\n | `ranges::adjacent_view`\u003cbr/\u003e`views::adjacent` | ![][c23no] | |\n | `ranges::adjacent_transform_view`\u003cbr/\u003e`views::adjacent_transform` | ![][c23no] | |\n | `ranges::join_with_view`\u003cbr/\u003e`views::join_with` | ![][c23ok] | |\n | `ranges::stride_view`\u003cbr/\u003e`views::stride` | ![][c23no] | |\n | `ranges::slide_view`\u003cbr/\u003e`views::slide` | ![][c23no] | |\n | `ranges::chunk_view`\u003cbr/\u003e`views::chunk` | ![][c23no] | |\n | `ranges::chunk_by_view`\u003cbr/\u003e`views::chunk_by` | ![][c23no] | |\n | `ranges::concat_view`\u003cbr/\u003e`views::concat` | ![][c26ok] * | |\n | `ranges::begin` | ![][c20ok] | ![][c23ok] |\n | `ranges::end` | ![][c20ok] | ![][c23ok] |\n | `ranges::cbegin` | ![][c20ok] | ![][c23ok] |\n | `ranges::cend` | ![][c20ok] | ![][c23ok] |\n | `ranges::crbegin` | ![][c20ok] | ![][c23ok] |\n | `ranges::crend` | ![][c20ok] | ![][c23ok] |\n | `ranges::size` | ![][c20ok] | ![][c23ok] |\n | `ranges::ssize` | ![][c20ok] | ![][c23ok] |\n | `ranges::empty` | ![][c20ok] | ![][c23ok] |\n | `ranges::data` | ![][c20ok] | ![][c23ok] |\n | `ranges::cdata` | ![][c20ok] | ![][c23ok] |\n | `ranges::subrange_kind` | ![][c20ok] | |\n | `ranges::from_range_t`\u003cbr/\u003e`ranges::from_range` | ![][c23ok] | |\n\n * Notes\n * `ranges::to`\n * CTAD for `Args...` may be incorrect before C++17\n * Equipped with C++23 conversions(e.g., `pair-like` -\u003e `std::pair`)\n * `ranges::concat_view`\n * Implemented before standardization\n * Needs update\n\n#### `\u003crcu\u003e`\n\n | | Introduced | Revision |\n |----------------------|------------|----------|\n | `rcu_obj_base` | ![][c26no] | |\n | `rcu_domain` | ![][c26no] | |\n | `rcu_default_domain` | ![][c26no] | |\n | `rcu_synchronize` | ![][c26no] | |\n | `rcu_barrier` | ![][c26no] | |\n | `rcu_retire` | ![][c26no] | |\n\n#### `\u003csemaphore\u003e`\n\n | | Introduced | Revision |\n |----------------------|------------|----------|\n | `counting_semaphore` | ![][c20no] | |\n | `binary_semaphore` | ![][c20no] | |\n\n#### `\u003cshared_mutex\u003e`\n\n | | Introduced | Revision |\n |--------------------|------------|----------|\n | `shared_mutex` | ![][c17no] | |\n\n#### `\u003cstop_token\u003e`\n\n | | Introduced | Revision |\n |-----------------|------------|----------|\n | `stop_token` | ![][c20no] | |\n | `stop_source` | ![][c20no] | |\n | `stop_callback` | ![][c20no] | |\n | `nostopstate_t` | ![][c20no] | |\n | `nostopstate` | ![][c20no] | |\n\n#### `\u003cstring\u003e`\n\n | | Introduced | Revision |\n |--------------------------------------|------------|-----------------------|\n | `erase(std::basic_string)` | ![][c20no] | ![][c26no] |\n | `erase_if(std::basic_string)` | ![][c20no] | ![][c26no] |\n | `basic_string` | | ![][c20no] ![][c23no] |\n\n#### `\u003cstring_view\u003e`\n\n | | Introduced | Revision |\n |--------------------------------|------------|------------------------------------|\n | `basic_string_view` | ![][c17ok] | ![][c20ok] ![][c23ok] ![][c26ok] * |\n | `std::hash\u003cbasic_string_view\u003e` | ![][c17ok] | |\n | `operator\"\"_sv` | ![][c17ok] | |\n\n * Notes\n * C++26 \n * [P2591 (R5)](https://wg21.link/P2591R5)\n * [P2697 (R1)](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2697r1.pdf)\n * Implemented as `preview::basic_string_view::operator bitset`\n * [P2495 (R3)](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2495r3.pdf)\n * Implemented as `preview::basic_string_view::operator string-streams`\n * Memory allocation is performed (conversion to `std::basic_string`)\n\n#### `\u003csource_location\u003e`\n N/A\n\n | | Introduced | Revision |\n |-------------------|------------|----------|\n | `source_location` | ![][c20no] | |\n\n#### `\u003csyncstream\u003e`\n\n | | Introduced | Revision |\n |----------------------------|------------|----------|\n | `basic_syncbuf` | ![][c20no] | |\n | `basic_osyncstream` | ![][c20no] | |\n | `std::swap(basic_syncbuf)` | ![][c20no] | |\n\n#### `\u003cspan\u003e`\n\n | | Introduced | Revision |\n |---------------------|------------|-----------------------|\n | `span` | ![][c20ok] | ![][c23ok] ![][c26ok] |\n | `dynamic_extent` | ![][c20ok] | |\n | `as_bytes` | ![][c20ok] | |\n | `as_writable_bytes` | ![][c20ok] | |\n\n#### `\u003cspanstream\u003e`\n\n | | Introduced | Revision |\n |---------------------|------------|----------|\n | `basic_spanbuf` | ![][c23no] | |\n | `basic_ispanstream` | ![][c23no] | |\n | `basic_ospanstream` | ![][c23no] | |\n | `basic_spanstream` | ![][c23no] | |\n\n#### `\u003cstacktrace\u003e`\n\n | | Introduced | Revision |\n |---------------------------|------------|----------|\n | `stacktrace_entry` | ![][c23no] | |\n | `basic_stacktrace` | ![][c23no] | |\n | `hash\u003cstracktrace_entry\u003e` | ![][c23no] | |\n | `hash\u003cbasic_stacktrace\u003e` | ![][c23no] | |\n\n#### `\u003ctext_encoding\u003e`\n\n | | Introduced | Revision |\n |-----------------|------------|----------|\n | `text_encoding` | ![][c26no] | |\n\n#### `\u003cthread\u003e`\n\n | | Introduced | Revision |\n |-----------|------------|----------|\n | `jthread` | ![][c20no] | |\n\n#### `\u003ctuple\u003e`\n\n | | Introduced | Revision |\n |--------------------------------------|------------|------------|\n | `apply` | ![][c17ok] | ![][c23ok] |\n | `make_from_tuple` | ![][c17ok] | ![][c23ok] |\n | `tuple_like` `pair_like` | ![][c23ok] | |\n | `basic_common_reference\u003ctuple-like\u003e` | ![][c23ok] | |\n | `common_type\u003ctuple-like\u003e` | ![][c23ok] | |\n | `formatter\u003ctuple-like\u003e` | ![][c23no] | |\n\n#### `\u003ctype_traits\u003e`\n\n | | Introduced | Revision |\n |-------------------------------------------------|----------------|-----------------------|\n | `common_type` | ![][c14] | ![][c20ok] ![][c23ok] |\n | `bool_constant` | ![][c17ok] | |\n | `has_unique_object_representations` | ![][c17no] N/A | |\n | `is_aggregate` | ![][c17no] N/A | |\n | `is_swappable_with`\u003cbr/\u003e`is_swappable`... | ![][c17ok] | |\n | `is_invocable` | ![][c17ok] | |\n | `invoke_result` | ![][c17ok] | |\n | `void_t` | ![][c17ok] | |\n | `conjunction` | ![][c17ok] | |\n | `disjunction` | ![][c17ok] | |\n | `negation` | ![][c17ok] | |\n | `common_reference`\u003cbr/\u003e`basic_common_reference` | ![][c20ok] | ![][c23ok] |\n | `is_bounded_array` | ![][c20ok] | |\n | `is_unbounded_array` | ![][c20ok] | |\n | `is_scoped_enum` | ![][c20no] N/A | |\n | `is_constant_evaluated` | ![][c20no] N/A | |\n | `is_corresponding_member` | ![][c20no] N/A | |\n | `is_layout_compatible` | ![][c20no] N/A | |\n | `is_nothrow_convertible` | ![][c20ok] | |\n | `is_pointer_interconvertible_base_of` | ![][c20no] N/A | |\n | `is_pointer_interconvertible_with_class` | ![][c20no] N/A | |\n | `remove_cvref` | ![][c20ok] | |\n | `type_identity` | ![][c20ok] | |\n | `is_implicit_lifetime` | ![][c23no] N/A | |\n | `is_scoped_enum` | ![][c23no] N/A | |\n | `reference_converts_from_temporary` | ![][c23no] N/A | |\n | `reference_constructs_from_temporary` | ![][c23no] N/A | |\n | `is_within_lifetime` | ![][c26no] N/A | |\n | `is_virtual_base_of` | ![][c26no] | |\n\n* Notes\n * `common_type`\n * If `common_type` fails to define member typedef `type`, it falls back to `std::common_type`\n ```c++\n struct common_a {};\n struct common_b {};\n struct common_c {};\n \n template\u003c\u003e\n struct std::common_type\u003ccommon_a, common_b\u003e {\n using type = common_c;\n };\n \n // fallback to std::common_type for user specialization types\n static_assert(std::is_same_v\u003cpreview::common_type_t\u003ccommon_a, common_b\u003e, common_c\u003e);\n \n // MSVC and GCC (before C++23) does not satisfy C++23 standard for std::common_type\u003ctuple-like\u003e \n static_assert(std::is_same_v\u003c\n std::common_type_t\u003cstd::tuple\u003cint, int\u003e, std::pair\u003cint, double\u003e\u003e, \n std::pair\u003cint, int\u003e\u003e);\n \n // Since std::common_type does not satisfy C++23, preview::common_type does not fallback to std::common_type\n static_assert(std::is_same_v\u003c\n preview::common_type_t\u003c std::tuple\u003cint, int\u003e, std::pair\u003cint, double\u003e\u003e, \n std::pair\u003cint, double\u003e\u003e);\n ```\n\n#### `\u003cutility\u003e`\n\n | | Introduced | Revision |\n |-----------------------------|------------|----------|\n | `as_const` | ![][c17ok] | |\n | `in_place`\u003cbr/\u003e`in_place_t` | ![][c17ok] | |\n | `cmp_equal`... | ![][c20ok] | |\n | `in_range` | ![][c20ok] | |\n | `forward_like` | ![][c23ok] | |\n | `to_underlying` | ![][c23ok] | |\n | `unreachable` | ![][c23ok] | |\n | `nontype`\u003cbr/\u003e`nontype_t` | ![][c26ok] | |\n\n#### `\u003cvariant\u003e`\n\n | | Introduced | Revision |\n |-----------------------|------------|------------|\n | `variant` | ![][c17ok] | ![][c26ok] |\n | `monostate` | ![][c17ok] | |\n | `bad_variant_access` | ![][c17ok] | |\n | `variant_size` | ![][c17ok] | |\n | `variant_alternative` | ![][c17ok] | |\n | `std::hash\u003cvariant\u003e` | ![][c17ok] | |\n | `variant_npos` | ![][c17ok] | |\n | `visit` | ![][c17ok] | |\n | `get_if` | ![][c17ok] | |\n\n#### `\u003cversion\u003e`\n\n | | Introduced | Revision |\n |----------------------|------------|----------|\n | | | |\n\n\n[c98]: https://img.shields.io/badge/C++98-grey\n[c11]: https://img.shields.io/badge/C++11-grey\n[c14]: https://img.shields.io/badge/C++14-grey\n[c17]: https://img.shields.io/badge/C++17-0055AA\n[c20]: https://img.shields.io/badge/C++20-4477BB\n[c23]: https://img.shields.io/badge/C++23-skyblue\n[c26]: https://img.shields.io/badge/C++26-99EEFF\n\n[c17no]: https://img.shields.io/badge/C++17-red\n[c17ok]: https://img.shields.io/badge/C++14-C++17-0055AA\n\n[c20no]: https://img.shields.io/badge/C++20-red\n[c20ok]: https://img.shields.io/badge/C++14-C++20-4477BB\n[c20ok17]: https://img.shields.io/badge/C++17-C++20-4477BB\n\n[c23no]: https://img.shields.io/badge/C++23-red\n[c23ok]: https://img.shields.io/badge/C++14-C++23-skyblue\n[c23ok17]: https://img.shields.io/badge/C++17-C++23-skyblue\n[c23ok20]: https://img.shields.io/badge/C++20-C++23-skyblue\n\n[c26no]: https://img.shields.io/badge/C++26-red\n[c26ok]: https://img.shields.io/badge/C++14-C++26-CCEEFF\n[c26ok17]: https://img.shields.io/badge/C++17-C++26-77EEFF\n[c26ok20]: https://img.shields.io/badge/C++20-C++26-77EEFF\n[c26ok23]: https://img.shields.io/badge/C++23-C++26-77EEFF\n\n\n[p000]: https://img.shields.io/badge/0%25-red\n[p001]: https://img.shields.io/badge/1%25-orange\n[p002]: https://img.shields.io/badge/2%25-orange\n[p003]: https://img.shields.io/badge/3%25-orange\n[p004]: https://img.shields.io/badge/4%25-orange\n[p005]: https://img.shields.io/badge/5%25-orange\n[p006]: https://img.shields.io/badge/6%25-orange\n[p007]: https://img.shields.io/badge/7%25-orange\n[p008]: https://img.shields.io/badge/8%25-orange\n[p009]: https://img.shields.io/badge/9%25-orange\n[p010]: https://img.shields.io/badge/10%25-orange\n[p011]: https://img.shields.io/badge/11%25-orange\n[p012]: https://img.shields.io/badge/12%25-orange\n[p013]: https://img.shields.io/badge/13%25-orange\n[p014]: https://img.shields.io/badge/14%25-orange\n[p015]: https://img.shields.io/badge/15%25-orange\n[p016]: https://img.shields.io/badge/16%25-orange\n[p017]: https://img.shields.io/badge/17%25-orange\n[p018]: https://img.shields.io/badge/18%25-orange\n[p019]: https://img.shields.io/badge/19%25-orange\n[p020]: https://img.shields.io/badge/20%25-orange\n[p021]: https://img.shields.io/badge/21%25-orange\n[p022]: https://img.shields.io/badge/22%25-orange\n[p023]: https://img.shields.io/badge/23%25-orange\n[p024]: https://img.shields.io/badge/24%25-orange\n[p025]: https://img.shields.io/badge/25%25-yellow\n[p026]: https://img.shields.io/badge/26%25-yellow\n[p027]: https://img.shields.io/badge/27%25-yellow\n[p028]: https://img.shields.io/badge/28%25-yellow\n[p029]: https://img.shields.io/badge/29%25-yellow\n[p030]: https://img.shields.io/badge/30%25-yellow\n[p031]: https://img.shields.io/badge/31%25-yellow\n[p032]: https://img.shields.io/badge/32%25-yellow\n[p033]: https://img.shields.io/badge/33%25-yellow\n[p034]: https://img.shields.io/badge/34%25-yellow\n[p035]: https://img.shields.io/badge/35%25-yellow\n[p036]: https://img.shields.io/badge/36%25-yellow\n[p037]: https://img.shields.io/badge/37%25-yellow\n[p038]: https://img.shields.io/badge/38%25-yellow\n[p039]: https://img.shields.io/badge/39%25-yellow\n[p040]: https://img.shields.io/badge/40%25-yellow\n[p041]: https://img.shields.io/badge/41%25-yellow\n[p042]: https://img.shields.io/badge/42%25-yellow\n[p043]: https://img.shields.io/badge/43%25-yellow\n[p044]: https://img.shields.io/badge/44%25-yellow\n[p045]: https://img.shields.io/badge/45%25-yellow\n[p046]: https://img.shields.io/badge/46%25-yellow\n[p047]: https://img.shields.io/badge/47%25-yellow\n[p048]: https://img.shields.io/badge/48%25-yellow\n[p049]: https://img.shields.io/badge/49%25-yellow\n[p050]: https://img.shields.io/badge/50%25-yellowgreen\n[p051]: https://img.shields.io/badge/51%25-yellowgreen\n[p052]: https://img.shields.io/badge/52%25-yellowgreen\n[p053]: https://img.shields.io/badge/53%25-yellowgreen\n[p054]: https://img.shields.io/badge/54%25-yellowgreen\n[p055]: https://img.shields.io/badge/55%25-yellowgreen\n[p056]: https://img.shields.io/badge/56%25-yellowgreen\n[p057]: https://img.shields.io/badge/57%25-yellowgreen\n[p058]: https://img.shields.io/badge/58%25-yellowgreen\n[p059]: https://img.shields.io/badge/59%25-yellowgreen\n[p060]: https://img.shields.io/badge/60%25-yellowgreen\n[p061]: https://img.shields.io/badge/61%25-yellowgreen\n[p062]: https://img.shields.io/badge/62%25-yellowgreen\n[p063]: https://img.shields.io/badge/63%25-yellowgreen\n[p064]: https://img.shields.io/badge/64%25-yellowgreen\n[p065]: https://img.shields.io/badge/65%25-yellowgreen\n[p066]: https://img.shields.io/badge/66%25-yellowgreen\n[p067]: https://img.shields.io/badge/67%25-yellowgreen\n[p068]: https://img.shields.io/badge/68%25-yellowgreen\n[p069]: https://img.shields.io/badge/69%25-yellowgreen\n[p070]: https://img.shields.io/badge/70%25-yellowgreen\n[p071]: https://img.shields.io/badge/71%25-yellowgreen\n[p072]: https://img.shields.io/badge/72%25-yellowgreen\n[p073]: https://img.shields.io/badge/73%25-yellowgreen\n[p074]: https://img.shields.io/badge/74%25-yellowgreen\n[p075]: https://img.shields.io/badge/75%25-green\n[p076]: https://img.shields.io/badge/76%25-green\n[p077]: https://img.shields.io/badge/77%25-green\n[p078]: https://img.shields.io/badge/78%25-green\n[p079]: https://img.shields.io/badge/79%25-green\n[p080]: https://img.shields.io/badge/80%25-green\n[p081]: https://img.shields.io/badge/81%25-green\n[p082]: https://img.shields.io/badge/82%25-green\n[p083]: https://img.shields.io/badge/83%25-green\n[p084]: https://img.shields.io/badge/84%25-green\n[p085]: https://img.shields.io/badge/85%25-green\n[p086]: https://img.shields.io/badge/86%25-green\n[p087]: https://img.shields.io/badge/87%25-green\n[p088]: https://img.shields.io/badge/88%25-green\n[p089]: https://img.shields.io/badge/89%25-green\n[p090]: https://img.shields.io/badge/90%25-green\n[p091]: https://img.shields.io/badge/91%25-green\n[p092]: https://img.shields.io/badge/92%25-green\n[p093]: https://img.shields.io/badge/93%25-green\n[p094]: https://img.shields.io/badge/94%25-green\n[p095]: https://img.shields.io/badge/95%25-green\n[p096]: https://img.shields.io/badge/96%25-green\n[p097]: https://img.shields.io/badge/97%25-green\n[p098]: https://img.shields.io/badge/98%25-green\n[p099]: https://img.shields.io/badge/99%25-green\n[p100]: https://img.shields.io/badge/100%25-brightgreen\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flackhole%2Fstl-preview","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flackhole%2Fstl-preview","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flackhole%2Fstl-preview/lists"}