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features_cpp23.yaml
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1648 lines (1500 loc) · 35.5 KB
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---
features:
- desc: "Literal suffix for (signed) `size_t` (`uz/t`)"
paper: P0330
support:
- GCC 11
- Clang 13
- MSVC 19.43
- Xcode 13.4.1
ftm:
- name: __cpp_size_t_suffix
value: 202011L
content: p0330_literal_suffix_size_t.md
- desc: "_Down with ()!_ (relax `()` rules for lambdas)"
paper: P1102
support:
- GCC 11
- Clang 13
- MSVC 19.44
- Xcode 13.4.1
- desc: "`if consteval`"
paper: P1938
support:
- GCC 12
- Clang 14
- MSVC 19.44
- Xcode 14
ftm:
- name: __cpp_if_consteval
value: 202106L
- desc: "Removing garbage collection support"
paper: P2186
support:
- GCC 12
- Clang (hint)
- MSVC 19.30
- Xcode (hint)
hints:
- target: Clang
msg: "Clang did not have garbage collection support, therefore it was not necessary to remove it."
- target: Xcode
msg: "Not applicable to Xcode / Apple Clang."
- desc: "Narrowing contextual conversions to `bool` (in `static_assert` and `constexpr if`)"
paper: P1401
support:
- GCC 9
- Clang 13 (partial)
- Clang 14
- MSVC 19.21 (hint)
- MSVC 19.44
- Xcode 14
hints:
- target: Clang 13
msg: "noexcept specifiers changes missing"
- target: MSVC 19.21
msg: "Compiles, but emits a warning: warning C4305: 'if': truncation from 'int' to 'bool'"
- desc: "Trimming whitespaces before line splicing"
paper: P2223
support:
- GCC
- Clang
- Xcode
- MSVC 19.50
- desc: "Make declaration order layout mandated"
paper: P1847
support:
- GCC
- Clang
- MSVC 19.30
- Xcode
- desc: "Remove mixed wide string literal concatenation"
paper: P2201
support:
- GCC
- Clang
- MSVC 19.44
- Xcode
- desc: "Explicit object member functions (deducing `this`)"
paper: P0847
support:
- GCC 14
- Clang 18
- Clang 19
- MSVC 19.32
- MSVC 19.43
- Xcode 16.3
ftm:
- name: __cpp_explicit_this_parameter
value: 202110L
- desc: "Proposed resolution for [CWG2692](https://wg21.link/CWG2692) static and explicit object member functions with the same parameter-type-lists"
paper: P2797
support:
- GCC 14
- Clang 19
- MSVC 19.50
- Xcode 16.3
- desc: "Decay-copy in the language (`auto(x)` and `auto{x}`)"
paper: P0849
support:
- GCC 12
- Clang 15
- MSVC 19.50
- Xcode 14.3
ftm:
- name: __cpp_auto_cast
value: 202110L
- desc: "Add support for preprocessing directives `#elifdef` and `#elifndef`"
paper: P2334
support:
- GCC 12
- Clang 13
- MSVC 19.40
- Xcode 13.4.1
- desc: "Non-literal variables (and labels and gotos) in `constexpr` functions"
paper: P2242
support:
- GCC 12
- Clang 15
- MSVC 19.43
- Xcode 14.3
ftm:
- name: __cpp_constexpr
value: 202110L
- desc: "Consistent character literal encoding"
paper: P2316
support:
- GCC
- Clang
- MSVC 19.30
- Xcode
- desc: "Character sets and encodings"
paper: P2314
support:
- GCC 10
- Clang
- Xcode
- desc: "Extend init-statement (of `for` loop) to allow alias-declaration"
paper: P2360
support:
- GCC 12
- Clang 14
- MSVC 19.50 (hint)
- Xcode 14
hints:
- target: MSVC 19.50
msg: "Compiles, but no IntelliSense support yet."
- desc: "Multidimensional subscript operator (`operator[x, y]`)"
paper: P2128
support:
- GCC 12
- Clang 15
- MSVC 19.42
- Xcode 14.3
ftm:
- name: __cpp_multidimensional_subscript
value: 202110L
- desc: "Attributes on lambdas"
paper: P2173
support:
- GCC 9
- Clang 13
- MSVC 19.44
- Xcode 13.4.1
- desc: "`#warning`"
paper: P2437
support:
- GCC 13
- Clang
- MSVC 19.50
- Xcode 15
- desc: "Remove non-encodable wide character literals and multicharacter wide character literals"
paper: P2362
support:
- GCC 13
- Clang 14
- Xcode 15
- desc: "Labels at the end of compound statements"
paper: P2324
support:
- GCC 13
- Clang 16
- Xcode 16
- desc: "Delimited escape sequences"
paper: P2290
support:
- GCC 13
- Clang 15
- MSVC 19.50
- Xcode 15
- desc: "Named universal character escapes"
paper: P2071
support:
- GCC 13
- Clang 15
- Xcode 15
ftm:
- name: __cpp_named_character_escapes
value: 202207L
- desc: "Relaxing some `constexpr` restrictions"
paper: P2448
support:
- GCC 13
- Clang 19
- Xcode 16.3
ftm:
- name: __cpp_constexpr
value: 202207L
- desc: "Simpler implicit move"
paper: P2266
support:
- GCC 13
- Clang 13
- Xcode 26
- MSVC 19.50
ftm:
- name: __cpp_implicit_move
value: 202207L
- desc: "`static operator()` (static call operator)"
paper: P1169
support:
- GCC 13
- Clang 16
- MSVC 19.44
- Xcode 16
ftm:
- name: __cpp_static_call_operator
value: 202207L
- desc: "Requirements for optional extended floating-point types"
paper: P1467
support:
- GCC 13
- MSVC (hint)
hints:
- target: MSVC
msg: "Not applicable to MSVC."
- desc: "Class template argument deduction from inherited constructors"
paper: P2582
support:
- GCC 14
- desc: "Attribute `[[assume]]`"
paper: P1774
support:
- GCC 13
- Clang 19
- Xcode 16.3
- desc: "Support for UTF-8 as a portable source file encoding"
paper: P2295
support:
- GCC 13
- Clang 15
- MSVC 19.0
- Xcode 15
- desc: "`static operator[]`"
paper: P2589
support:
- GCC 13
- Clang 16
- MSVC 19.44
- Xcode 16
ftm:
- name: __cpp_multidimensional_subscript
value: 202211L
content: p2589_static_subscript_operator.md
- desc: "Permitting static `constexpr` variables in `constexpr` functions"
paper: P2647
support:
- GCC 13
- Clang 16
- Xcode 16
ftm:
- name: __cpp_constexpr
value: 202211L
- desc: "Extending the lifetime of temporaries in range-based `for` loop initializer"
paper:
- P2644
- P2718
support:
- GCC 15
- Clang 19
- Xcode 16.3
ftm:
- name: __cpp_range_based_for
value: 202211L
keywords: ["safety"]
- desc: "Declarations and where to find them"
paper: P1787
support:
- MSVC
- desc: "Change scope of lambda trailing-return-type"
paper:
- P2036
- P2579
support:
- GCC 16
- Clang 17
- Xcode 16.3
- MSVC 19.50
- desc: "Meaningful exports"
paper: P2615
support:
- GCC 15
- Clang 17
- MSVC 19.28
- desc: "`consteval` needs to propagate up"
paper: P2564
support:
- GCC 14
- Clang 17
- Xcode 16
ftm:
- name: __cpp_consteval
value: 202211L
- desc: "C++ identifier syntax using Unicode Standard Annex 31"
paper: P1949
support:
- GCC 12
- Clang 14
- Xcode 14
- MSVC 19.50
- desc: "Allow duplicate attributes"
paper: P2156
support:
- GCC 11
- Clang 13
- Xcode 13.4.1
- MSVC 19.50
- desc: "Adjusting the value of feature-test macro `__cpp_concepts`"
paper: P2493
support:
- GCC 12
- Clang 19
- MSVC 19.50
- Xcode 16.4
- desc: "Relax requirements on `wchar_t` to match existing practices"
paper: P2460
support:
- GCC
- Clang
- MSVC 19.44
- Xcode 15
- desc: "Using unknown pointers and references in constant expressions"
paper: P2280
support:
- GCC 14
- Clang 20
- MSVC 19.50
keywords: ["constexpr"]
- desc: "The equality operator you are looking for"
paper: P2468
support:
- GCC 13
- Clang 16
- Xcode 16
- MSVC 19.36
- desc: "`char8_t` compatibility and portability fix"
paper: P2513
support:
- GCC 13
- Clang 16
- MSVC 19.34
- Xcode 16
ftm:
- name: __cpp_char8_t
value: 202207L
- desc: "`<stacktrace>`"
paper: P0881
lib: true
support:
- GCC 12 (partial)
- GCC 14
- MSVC 19.34
hints:
- target: GCC 12
msg: "Enabled by building GCC with `--enable-libstdcxx-backtrace=yes`, requires linking against `-lstdc++_libbacktrace`"
ftm:
- name: __cpp_lib_stacktrace
value: 202011L
- desc: "Add a `pmr` alias for `std::stacktrace`"
paper: P2301
lib: true
support:
- GCC 12 (partial)
- GCC 14
- MSVC 19.34
hints:
- target: GCC 12
msg: "Enabled by building GCC with `--enable-libstdcxx-backtrace=yes`, requires linking against `-lstdc++_libbacktrace`"
ftm:
- name: __cpp_lib_stacktrace
value: 202011L
- desc: "`<stdatomic.h>`"
paper: P0943
lib: true
support:
- GCC 12
- Clang 15
- MSVC 19.31
- Xcode 14.3
ftm:
- name: __cpp_lib_stdatomic_h
value: 202011L
- desc: "`std::is_scoped_enum`"
paper: P1048
lib: true
support:
- GCC 11
- Clang 12
- MSVC 19.30
- Xcode 13
ftm:
- name: __cpp_lib_is_scoped_enum
value: 202011L
- desc: "`std::basic_string::contains()` and `std::basic_string_view::contains()`"
paper: P1679
lib: true
support:
- GCC 11
- Clang 12
- MSVC 19.30
- Xcode 13
ftm:
- name: __cpp_lib_string_contains
value: 202011L
- desc: "`std::to_underlying()`"
paper: P1682
lib: true
support:
- GCC 11
- Clang 13
- MSVC 19.30
- Xcode 13.4.1
ftm:
- name: __cpp_lib_to_underlying
value: 202102L
- desc: "Relaxing requirements for `chrono::time_point::clock`"
paper: P2212
lib: true
support:
- MSVC
- GCC 11
- Clang 17
- Xcode 16.1
- desc: "Providing size feedback in the Allocator interface"
paper: P0401
lib: true
support:
- Clang 15
- MSVC 19.30
- Xcode 14.3
ftm:
- name: __cpp_lib_allocate_at_least
value: 202302L
- desc: "`<spanstream>`: stringstream with `std::span`-based buffer"
paper: P0448
lib: true
support:
- GCC 12
- MSVC 19.31
ftm:
- name: __cpp_lib_spanstream
value: 202106L
- desc: "`std::out_ptr()` and `std::inout_ptr()`"
paper: P1132
lib: true
support:
- GCC 14
- Clang 19
- MSVC 19.30
- Xcode 16.4
ftm:
- name: __cpp_lib_out_ptr
value: 202106L
- desc: "`constexpr` `std::type_info::operator==()`"
paper: P1328
lib: true
support:
- GCC 12
- Clang 17
- MSVC 19.33
- MSVC 19.34
- Xcode 15
ftm:
- name: __cpp_lib_constexpr_typeinfo
value: 202106L
- desc: "Iterator pair constructors for `std::stack` and `std::queue`"
paper: P1425
lib: true
support:
- GCC 12
- Clang 14
- MSVC 19.31
- Xcode 14.3
ftm:
- name: __cpp_lib_adaptor_iterator_pair_constructor
value: 202106L
- desc: "Non-deduction context for allocators in container deduction guides"
paper: P1518
lib: true
support:
- GCC 12
- Clang 13
- MSVC 19.31
- Xcode 13.4.1
- desc: "`ranges::starts_with()` and `ranges::ends_with()`"
paper: P1659
lib: true
support:
- GCC 16
- Clang 17 (partial)
- Clang 19
- MSVC 19.31
- Xcode 16
hints:
- target: Clang 17
msg: "Implements `std::ranges::starts_with()` only."
ftm:
- name: __cpp_lib_ranges_starts_ends_with
value: 202106L
- desc: "Prohibiting `std::basic_string` and `std::basic_string_view` construction from `nullptr`"
paper: P2166
lib: true
support:
- GCC 12
- Clang 13
- MSVC 19.30
- Xcode 13.4.1
- desc: "`std::invoke_r()`"
paper: P2136
lib: true
support:
- GCC 12
- Clang 17
- MSVC 19.31
- Xcode 15
ftm:
- name: __cpp_lib_invoke_r
value: 202106L
- desc: "Range constructor for `std::basic_string_view`"
paper: P1989
lib: true
support:
- GCC 11
- Clang 14
- MSVC 19.30
- Xcode 14.3
- desc: "Default template arguments for `std::pair`'s forwarding constructor"
paper: P1951
lib: true
support:
- GCC 14
- Clang 14
- MSVC 19.30
- Xcode 14.3
- desc: "Remove garbage collection and reachability-based leak detection (library support)"
paper: P2186
lib: true
support:
- GCC 12
- Clang 14
- MSVC 19.30
- Xcode 14.3
- desc: "zip: `views::zip()`, `views::zip_transform()`, `views::adjacent()` and `views::adjacent_transform()`"
paper: P2321
lib: true
support:
- GCC 13
- Clang 15 (partial)
- MSVC 19.37
- Xcode 14.3
hints:
- target: Clang 15
msg: "Only implements tuple specializations and `views::zip()`."
ftm:
- name: __cpp_lib_ranges_zip
value: 202110L
- desc: "Heterogeneous erasure overloads for associative containers"
paper: P2077
lib: true
support:
- MSVC 19.32
ftm:
- name: __cpp_lib_associative_heterogeneous_erasure
value: 202110L
keywords: ["erase"]
- desc: "`std::byteswap()`"
paper: P1272
lib: true
support:
- GCC 12
- Clang 14
- MSVC 19.31
- Xcode 14.3
ftm:
- name: __cpp_lib_byteswap
value: 202110L
- desc: "Printing volatile `T*`"
paper: P1147
lib: true
support:
- GCC 11.3
- Clang 14
- MSVC 19.31
- Xcode 14.3
- desc: "`std::basic_string::resize_and_overwrite()`"
paper: P1072
lib: true
support:
- GCC 12
- Clang 14
- MSVC 19.31
- Xcode 14.3
ftm:
- name: __cpp_lib_string_resize_and_overwrite
value: 202110L
- desc: "Monadic operations for `std::optional` (`and_then()`, `or_else()`, `transform()`)"
paper: P0798
lib: true
support:
- GCC 12
- Clang 14
- MSVC 19.32
- Xcode 14.3
ftm:
- name: __cpp_lib_optional
value: 202110L
- desc: "`std::move_only_function`"
paper: P0288
lib: true
support:
- GCC 12
- Clang 17
- MSVC 19.32
ftm:
- name: __cpp_lib_move_only_function
value: 202110L
- desc: "Add a conditional `noexcept` specification to `std::exchange()`"
paper: P2401
lib: true
support:
- GCC 12
- Clang 14
- MSVC 19.31
- Xcode 14.3
- desc: "Require `std::span` and `std::basic_string_view` to be [TriviallyCopyable](https://en.cppreference.com/w/cpp/named_req/TriviallyCopyable)"
paper: P2251
lib: true
support:
- GCC
- Clang
- MSVC 19.31
- Xcode
- desc: 'Clarifying the status of the "C headers"'
paper: P2340
lib: true
support:
- GCC
- Clang
- MSVC
- Xcode
- desc: "`std::expected` (`<expected>`)"
paper:
- P0323
- P2549
lib: true
support:
- GCC 12
- Clang 16
- MSVC 19.33
- Xcode 15
ftm:
- name: __cpp_lib_expected
value: 202202L
- desc: "`constexpr` for `<cmath>` and `<cstdlib>`"
paper: P0533
lib: true
ftm:
- name: __cpp_lib_constexpr_cmath
value: 202202L
- desc: "`std::unreachable()`"
paper: P0627
lib: true
support:
- GCC 12
- Clang 15
- MSVC 19.32
- Xcode 14.3
ftm:
- name: __cpp_lib_unreachable
value: 202202L
- desc: "Deprecating `std::aligned_storage` and `std::aligned_union`"
paper: P1413
lib: true
support:
- GCC 13
- Clang 16
- MSVC 19.33
- Xcode 16.1
- desc: "`std::reference_constructs_from_temporary` and `std::reference_converts_from_temporary`"
paper: P2255
lib: true
support:
- GCC 13 (partial)
- GCC 14
- Clang 21 (partial)
- MSVC 19.51 (partial)
- Xcode 16.3
hints:
- target: GCC 13
msg: "Missing changes to `std::tuple`."
- target: Clang 21
msg: "Only type traits are implemented."
- target: MSVC 19.50
msg: "Currently only supported by the STL in conjunction with Clang."
ftm:
- name: __cpp_lib_reference_from_temporary
value: 202202L
- desc: "`constexpr` `std::unique_ptr`"
paper: P2273
lib: true
support:
- GCC 12
- Clang 16
- MSVC 19.33
- Xcode 15
ftm:
- name: __cpp_lib_constexpr_memory
value: 202202L
- desc: "Conversions from ranges to containers (`ranges::to()`)"
paper: P1206
lib: true
support:
- GCC 14 (partial)
- GCC 15
- Clang 17
- MSVC 19.34
- Xcode 15
ftm:
- name: __cpp_lib_containers_ranges
value: 202202L
- name: __cpp_lib_ranges_to_container
value: 202202L
- desc: "Pipe support for user-defined range adaptors (`ranges::range_adaptor_closure` and `std::bind_back()`)"
paper: P2387
lib: true
support:
- GCC 13 (partial)
- GCC 14
- Clang 19
- MSVC 19.34
- Xcode 16.3
ftm:
- name: __cpp_lib_bind_back
value: 202202L
- name: __cpp_lib_ranges
value: 202202L
- desc: "`ranges::iota()`, `ranges::shift_left()` and `ranges::shift_right()`"
paper: P2440
lib: true
support:
- GCC 13 (partial)
- MSVC 19.34
- Clang 21 (partial)
hints:
- target: GCC 13
msg: "Only `ranges::iota()` is implemented."
- target: Clang 21
msg: "Only `ranges::iota()` is implemented. ([GitHub PR](https://github.com/llvm/llvm-project/pull/68494))"
ftm:
- name: __cpp_lib_ranges_iota
value: 202202L
- name: __cpp_lib_shift
value: 202202L
- desc: "`views::join_with()`"
paper: P2441
lib: true
support:
- GCC 13
- Clang 21
- MSVC 19.34
ftm:
- name: __cpp_lib_ranges_join_with
value: 202202L
- desc: "`views::chunk()` and `views::slide()`"
paper: P2442
lib: true
support:
- GCC 13
- MSVC 19.33
ftm:
- name: __cpp_lib_ranges_chunk
value: 202202L
- name: __cpp_lib_ranges_slide
value: 202202L
- desc: "`views::chunk_by()`"
paper: P2443
lib: true
support:
- GCC 13
- Clang 18
- MSVC 19.33
- Xcode 16
ftm:
- name: __cpp_lib_ranges_chunk_by
value: 202202L
- desc: "`std::mdspan`: a non-owning multidimensional array reference (`<mdspan>`)"
paper:
- P0009
- P2599
- P2604
- P2613
- P2763
lib: true
support:
- GCC 16
- Clang 18
- MSVC 19.39
- Xcode 15
ftm:
- name: __cpp_lib_mdspan
value: 202207L
- desc: "Referencing the Unicode Standard"
paper: P2736
lib: true
support:
- GCC
- Clang
- Xcode
- MSVC 19.37
- desc: "De-deprecating volatile compound operations."
paper: P2327
lib: true
support:
- Xcode 15
- MSVC 19.34
- desc: "`std::flat_map` (`<flat_map>`)"
paper: P0429
lib: true
support:
- GCC 15
- Clang 20
- Xcode 26
ftm:
- name: __cpp_lib_flat_map
value: 202207L
- desc: "`std::flat_set` (`<flat_set>`)"
paper: P1222
lib: true
support:
- GCC 15
- Clang 21
ftm:
- name: __cpp_lib_flat_set
value: 202207L
- desc: "`ranges::find_last()`, `ranges::find_last_if()` and `ranges::find_last_if_not()`"
paper: P1223
lib: true
support:
- GCC 13
- Clang 19
- MSVC 19.36
- Xcode 16.3
ftm:
- name: __cpp_lib_ranges_find_last
value: 202207L
- desc: "Freestanding library: Easy `<utility>`, `<ranges>` and `<iterator>`"
paper: P1642
lib: true
support:
- GCC 13
- MSVC 19.38
- desc: "`ranges::stride_view` and `views::stride()`"
paper: P1899
lib: true
support:
- GCC 13
- MSVC 19.34
ftm:
- name: __cpp_lib_ranges_stride
value: 202207L
- desc: "Compatibility between `std::tuple` and tuple-like objects"
paper: P2165
lib: true
support:
- GCC 14 (partial)
- GCC 16
- Clang 2.9 (partial)
- MSVC 19.36 (partial)
- MSVC 19.37
- Xcode (partial)
hints:
- target: GCC 14
msg: "Some views incorrectly still return `std::pair` instead of `std::tuple`"
- target: Clang 2.9
msg: "Changes of `tuple`, `adjacent_view`, and `cartesian_product_view` are not yet implemented."
- target: MSVC 19.36
msg: "Implemented for `std::pair`."
- target: Xcode
msg: "Only the part for `zip_view` is implemented."
ftm:
- name: __cpp_lib_tuple_like
value: 202207L
- desc: "Rectifying constant iterators, sentinels and ranges (`views::as_const()`)"
paper: P2278
lib: true
support:
- GCC 13