ChapterÂ 1.Â Status

ChapterÂ 1.Â Status
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Implementation Status

C++ 1998/2003

Implementation Status

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ChapterÂ 1.Â Status

Implementation Status

C++ 1998/2003

Implementation Status

This status table is based on the table of contents of ISO/IEC 14882:2003.

This page describes the C++ support in mainline GCC SVN, not in any @@ -890,25 +890,36 @@ and test for __STDCPP_MATH_SPEC_FUNCS__ >= 201003L. Specific Behavior and C++ 2011 Implementation Specific Behavior. This section only documents behaviour which is new in the 2017 standard. +

+ 20.5.1.2 [headers] + Whether names from Annex K are declared by C++ headers depends on + whether the underlying C library supports Annex K and declares the + names. For the GNU C library, there is no Annex K support and so + none of its names are declared by C++ headers.

23.6.5 [optional.bad_optional_access] what() returns "bad optional access".

23.7.3 [variant.variant] - Whether variant supports over-aligned types - should be documented here. + variant supports over-aligned types.

23.7.10 [variant.bad.access] what() returns "Unexpected index".

23.12.5.2 [memory.resource.pool.options] - The limits for maximum number of blocks and largest allocation size - supported by pool_options should be documented - here. + Let S equal numeric_limits<size_t>::digits. + The limit for maximum number of blocks in a chunk is given by + 2^N-1, + where N is min(19, 3 + S/2). + The largest allocation size that will be allocated from a pool is + 2²² + when S > 20, + otherwise 3072 when S > 16, + otherwise 768.

23.12.6.1 [memory.resource.monotonic.buffer.ctor] - The default next_buffer_size and growth factor should - be documented here. + The default next_buffer_size is 128 * sizeof(void*). + The default growth factor is 1.5.

23.15.4.3 [meta.unary.prop] The predicate condition for @@ -950,11 +961,363 @@ and test for __STDCPP_MATH_SPEC_FUNCS__ >= 201003L. on some targets.

30.10.5 [fs.filesystem.syn] - The clock used for file times is - std::chrono::system_clock. + The clock used for file times is an unspecified type + with a signed 64-bit representation, capable of representing + timestamps with nanosecond resolution. The clock's epoch is + unspecified, but is not the same as the system clock's epoch.

30.10.7.1 [fs.path.generic] dot-dot in the root-directory refers to the root-directory itself. + On Windows, a drive specifier such as "C:" or + "z:" is treated as a root-name. On Cygwin, a path + that begins with two successive directory separators is a + root-name. Otherwise (for POSIX-like systems other than Cygwin), + the implementation-defined root-name is an unspecified string + which does not appear in any pathnames. +

+ 30.10.10.1 [fs.enum.path.format] + The character sequence is always interpreted in the native pathname + format. +

+ 30.10.15.4 [fs.op.file_size] + If !is_regular_file(p), an error is reported. +

C++ 202a

+In this implementation the -std=gnu++2a or +-std=c++2a flag must be used to enable language +and library +features. See dialect +options. The pre-defined symbol +__cplusplus is used to check for the +presence of the required flag. +

+This section describes the C++20 and library TS support in mainline GCC SVN, +not in any particular release. +

+The following table lists new library features that have been accepted into +the C++2a working draft. The "Proposal" column provides a link to the +ISO C++ committee proposal that describes the feature, while the "Status" +column indicates the first version of GCC that contains an implementation of +this feature (if it has been implemented). +The "SD-6 Feature Test" column shows the corresponding macro or header from +SD-6: +Feature-testing recommendations for C++. +

TableÂ 1.7.Â C++ 2020 Implementation Status

Library Feature	Proposal	Status	SD-6 Feature Test
Endian just Endian	+ + P0463R1 + +	8.1	Â
Extending `make_shared` to Support Arrays	+ + P0674R1 + +		Â
Floating Point Atomic	+ + P0020R6 + +		Â
C++ Synchronized Buffered Ostream	+ + P0053R7 + +		Â
Add constexpr modifiers to functions in `<algorithm>` and `<utility>` Headers	+ + P0202R3 + +		Â
Constexpr for `std::complex`	+ + P0415R1 + +	9.1	Â
Make `std::memory_order` a scoped enumeration	+ + P0439R0 + +		Â
String Prefix and Suffix Checking	+ + P0457R2 + +	9.1	Â
Transformation Trait `remove_cvref`	+ + P0550R2 + +	9.1	Â
`nodiscard` in the Library	+ + P0600R1 + +		Â
de-pessimize legacy algorithms with `std::move`	+ + P0616R0 + +		Â
Utility to convert a pointer to a raw pointer	+ + P0653R2 + +	8.1	Â
Atomic `shared_ptr`	+ + P0718R2 + +		Â
Deprecate POD	+ + P0767R1 + +		Â
Library Support for the Spaceship (Comparison) Operator	+ + P0768R1 + +		Â
Treating Unnecessary `decay`	+ + P0777R1 + +		Â
`<span>`	+ + P0122R7 + +		Â
Extending chrono to Calendars and Time Zones	+ + P0355R7 + +		Â
Thou Shalt Not Specialize std Function Templates!	+ + P0551R3 + +		Â
Manipulators for C++ Synchronized Buffered Ostream	+ + P0753R2 + +		Â
`<version>`	+ + P0754R2 + +	9.1	Â
Comparing Unordered Containers	+ + P0809R0 + +		Â
Constexpr iterator requirements	+ + P0858R0 + +		Â
Symmetry for spaceship	+ + P0905R1 + +		Â
`string::reserve` Should Not Shrink	+ + P0966R1 + +		Â
Atomic Ref	+ + P0019R8 + +		Â
Checking for Existence of an Element in Associative Containers	+ + P0458R2 + +	9.1	Â
LWG 2511: guaranteed copy elision for piecewise construction	+ + P0475R1 + +	7.1	Â
Bit-casting object representations	+ + P0476R2 + +		Â
The Curious Case of Padding Bits, Featuring Atomic Compare-and-Exchange	+ + P0528R3 + +		Â
Support for contract based programming in C++	+ + P0542R5 + +		Â
Integral power-of-2 operations	+ + P0556R3 + +	9.1	Â
Reviewing Deprecated Facilities of C++17 for C++20	+ + P0619R4 + +		Â
Improving the Return Value of Erase-Like Algorithms	+ + P0646R1 + +	9.1	`__cpp_lib_list_remove_return_type >= 201806L`
Efficient sized delete for variable sized classes	+ + P0722R3 + +	9.1	`__cpp_lib_destroying_delete >= 201806L`
Implicit conversion traits and utility functions	+ + P0758R1 + +	9.1	Â
`fpos` Requirements	+ + P0759R1 + +	Note 1	Â
Add `shift` to `<algorithm>`	+ + P0769R2 + +		Â
Standard Library Specification in a Concepts and Contracts World	+ + P0788R3 + +		Â
Constexpr for `swap` and swap related functions	+ + P0879R0 + +		Â
The `identity` metafunction	+ + P0887R1 + +		Â
`explicit(bool)`	+ + P0892R2 + +	Note 1	Â
Standard Library Concepts	+ + P0898R3 + +		Â
Eradicating unnecessarily explicit default constructors from the standard library	+ + P0935R0 + +	9.1	Â
Integrating feature-test macros into the C++ WD	+ + P0941R2 + +	5.1	Â
`constexpr` comparison operators for `std::array`	+ + P1023R0 + +		Â
Update The Reference To The Unicode Standard	+ + P1025R1 + +		Â
Consistency improvements for `<=>` and other comparison operators	+ + P1120R0 + +		Â
`unwrap_ref_decay` and `unwrap_reference`	+ + P0318R1 + +	9.1	Â
Simplified partial function application	+ + P0356R5 + +		Â
`reference_wrapper` for incomplete types	+ + P0357R3 + +	9.1	Â
`char8_t`: A type for UTF-8 characters and strings	+ + P0482R6 + +		Â
Fixing `operator>>(basic_istream&, CharT*)` (LWG 2499)	+ + P0487R1 + +		Â
Utility functions to implement uses-allocator construction	+ + P0591R4 + +		Â
P0595R2 `std::is_constant_evaluated()`	+ + P0595R2 + +	9.1	Â
`variant` and `optional` should propagate copy/move triviality	+ + P0602R4 + +	8.3	Â
A sane `variant` converting constructor	+ + P0608R3 + +		Â
`visit<R>`: Explicit Return Type for `visit`	+ + P0655R1 + +		Â
`std::function` move constructor should be `noexcept`	+ + P0771R1 + +	7.2	Â
The One Ranges Proposal	+ + P0896R4 + +		Â
P0899R1 - LWG 3016 is not a defect	+ + P0899R1 + +	7.1	Â
Heterogeneous lookup for unordered containers	+ + P0919R3 + +		Â
`<chrono>` `zero()`, `min()`, and `max()` should be `noexcept`	+ + P0972R0 + +	9.1	Â
Constexpr in `std::pointer_traits`	+ + P1006R1 + +		Â
`std::assume_aligned`	+ + P1007R3 + +		Â
Smart pointer creation with default initialization	+ + P1020R1 + +		Â
Misc constexpr bits	+ + P1032R1 + +		Â
Should Span be Regular?	+ + P1085R2 + +		Â
Editorial Guidance for merging P0019r8 and P0528r3	+ + P1123R0 + +		Â
Cleaning up Clause 20	+ + P1148R0 + +		Â
Make stateful allocator propagation more consistent for `operator+(basic_string)`	+ + P1165R1 + +		Â
Adopt Consistent Container Erasure from Library Fundamentals 2 for C++20	+ + P1209R0 + +	9.1	`__cpp_lib_erase_if >= 201811L`
Completing the Rebase of Library Fundamentals, Version 3, Working Draft	+ + P1210R0 + +		Â
Alternative Wording for P0907R4 Signed Integers are Two's Complement	+ + P1236R1 + +		Â
Remove CommonReference requirement from StrictWeakOrdering (a.k.a Fixing Relations)	+ + P1248R1 + +		Â
Improving Completeness Requirements for Type Traits	+ + P1285R0 + +		Â
Missing feature test macros	+ + P1353R0 + +	Partial	Â

+Note 1: The changes in the proposal either do not affect the code in libstdc++, +or the changes are not required for conformance. +

Implementation Specific Behavior

For behaviour which is also specified by previous standards, + see C++ 1998/2003 Implementation + Specific Behavior, C++ + 2011 Implementation Specific Behavior and C++ 2017 Implementation Specific + Behavior. + This section only documents behaviour which is new in the 202a draft.

C++ TR1

This table is based on the table of contents of ISO/IEC DTR 19768 Doc No: N1836=05-0096 Date: 2005-06-24 @@ -966,7 +1329,7 @@ In this implementation the header names are prefixed by

This page describes the TR1 support in mainline GCC SVN, not in any particular release. -

TableÂ 1.7.Â C++ TR1 Implementation Status

Section Description Status Comments

2 General Utilities

2.1 Reference wrappers Â Â

2.1.1 Additions to header <functional> synopsis Y Â

2.1.2 Class template reference_wrapper Â Â

2.1.2.1 reference_wrapper construct/copy/destroy Y Â

2.1.2.2 reference_wrapper assignment Y Â

2.1.2.3 reference_wrapper access Y Â

2.1.2.4 reference_wrapper invocation Y Â

2.1.2.5 reference_wrapper helper functions Y Â

2.2 Smart pointers Â Â

2.2.1 Additions to header <memory> synopsis Y Â

2.2.2 Class bad_weak_ptr Y Â

2.2.3

Class template shared_ptr

TableÂ 1.8.Â C++ TR1 Implementation Status

Section Description Status Comments

2 General Utilities

2.1 Reference wrappers Â Â

2.1.1 Additions to header <functional> synopsis Y Â

2.1.2 Class template reference_wrapper Â Â

2.1.2.1 reference_wrapper construct/copy/destroy Y Â

2.1.2.2 reference_wrapper assignment Y Â

2.1.2.3 reference_wrapper access Y Â

2.1.2.4 reference_wrapper invocation Y Â

2.1.2.5 reference_wrapper helper functions Y Â

2.2 Smart pointers Â Â

2.2.1 Additions to header <memory> synopsis Y Â

2.2.2 Class bad_weak_ptr Y Â

2.2.3

Class template shared_ptr

Uses code from boost::shared_ptr. @@ -987,7 +1350,7 @@ decimal floating-point arithmetic

This page describes the TR 24733 support in mainline GCC SVN, not in any particular release. -

TableÂ 1.8.Â C++ TR 24733 Implementation Status

Section Description Status Comments

TableÂ 1.9.Â C++ TR 24733 Implementation Status

Section Description Status Comments

Introduction @@ -1027,7 +1390,7 @@ non-strict modes (i.e. -std=gnu++NN modes) the hypergeometric functions and confluent hypergeometric functions from TR1 are also provided, defined in namespace __gnu_cxx. -

TableÂ 1.9.Â C++ Special Functions Implementation Status

Section Description Status Comments

Macro names

Partial

No diagnostic for inconsistent definitions of +

TableÂ 1.10.Â C++ Special Functions Implementation Status

Section	Description	Status	Comments
7	Macro names	Partial	No diagnostic for inconsistent definitions of `__STDCPP_WANT_MATH_SPEC_FUNCS__`
8	Mathematical special functions	Y	Â
8.1	Additions to header `<cmath>` synopsis	Y	Â
8.1.1	associated Laguerre polynomials	Y	Â
8.1.2	associated Legendre functions	Y	Â
8.1.3	beta function	Y	Â
8.1.4	(complete) elliptic integral of the first kind	Y	Â
8.1.5	(complete) elliptic integral of the second kind	Y	Â
8.1.6	(complete) elliptic integral of the third kind	Y	Â
8.1.7	regular modified cylindrical Bessel functions	Y	Â
8.1.8	cylindrical Bessel functions (of the first kind)	Y	Â
8.1.9	irregular modified cylindrical Bessel functions	Y	Â
8.1.10	cylindrical Neumann functions	Y	Â
8.1.11	(incomplete) elliptic integral of the first kind	Y	Â
8.1.12	(incomplete) elliptic integral of the second kind	Y	Â
8.1.13	(incomplete) elliptic integral of the third kind	Y	Â
8.1.14	exponential integral	Y	Â
8.1.15	Hermite polynomials	Y	Â
8.1.16	Laguerre polynomials	Y	Â
8.1.17	Legendre polynomials	Y	Â
8.1.18	Riemann zeta function	Y	Â
8.1.19	spherical Bessel functions (of the first kind)	Y	Â
8.1.20	spherical associated Legendre functions	Y	Â
8.1.21	spherical Neumann functions	Y	Â
8.2	Additions to header `<math.h>`	Y	Â
8.3	The header `<ctgmath>`	Partial	Conflicts with C++ 2011 requirements.
8.4	The header `<tgmath.h>`	N	Conflicts with C++ 2011 requirements.

Implementation Specific Behavior

For behaviour which is specified by the 2011 standard, see C++ 2011 Implementation Specific Behavior. This section documents behaviour which diff --git a/libstdc++-v3/doc/xml/manual/intro.xml b/libstdc++-v3/doc/xml/manual/intro.xml index 7159b592c9f..28210cb0862 100644 --- a/libstdc++-v3/doc/xml/manual/intro.xml +++ b/libstdc++-v3/doc/xml/manual/intro.xml @@ -43,6 +43,10 @@ + + + + diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml index f3793083375..0af8a02b00f 100644 --- a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml +++ b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml @@ -980,6 +980,14 @@ and test for __STDCPP_MATH_SPEC_FUNCS__ >= 201003L. documents behaviour which is new in the 2017 standard. + + 20.5.1.2 [headers] + Whether names from Annex K are declared by C++ headers depends on + whether the underlying C library supports Annex K and declares the + names. For the GNU C library, there is no Annex K support and so + none of its names are declared by C++ headers. + + 23.6.5 [optional.bad_optional_access] what() returns "bad optional access". @@ -987,8 +995,7 @@ and test for __STDCPP_MATH_SPEC_FUNCS__ >= 201003L. 23.7.3 [variant.variant] - Whether variant supports over-aligned types - should be documented here. + variant supports over-aligned types. @@ -998,15 +1005,21 @@ and test for __STDCPP_MATH_SPEC_FUNCS__ >= 201003L. 23.12.5.2 [memory.resource.pool.options] - The limits for maximum number of blocks and largest allocation size - supported by pool_options should be documented - here. + Let S equal numeric_limits<size_t>::digits. + The limit for maximum number of blocks in a chunk is given by + 2N-1, + where N is min(19, 3 + S/2). + The largest allocation size that will be allocated from a pool is + 222 + when S > 20, + otherwise 3072 when S > 16, + otherwise 768. 23.12.6.1 [memory.resource.monotonic.buffer.ctor] - The default next_buffer_size and growth factor should - be documented here. + The default next_buffer_size is 128 * sizeof(void*). + The default growth factor is 1.5. @@ -1067,13 +1080,32 @@ and test for __STDCPP_MATH_SPEC_FUNCS__ >= 201003L. 30.10.5 [fs.filesystem.syn] - The clock used for file times is - std::chrono::system_clock. + The clock used for file times is an unspecified type + with a signed 64-bit representation, capable of representing + timestamps with nanosecond resolution. The clock's epoch is + unspecified, but is not the same as the system clock's epoch. 30.10.7.1 [fs.path.generic] dot-dot in the root-directory refers to the root-directory itself. + On Windows, a drive specifier such as "C:" or + "z:" is treated as a root-name. On Cygwin, a path + that begins with two successive directory separators is a + root-name. Otherwise (for POSIX-like systems other than Cygwin), + the implementation-defined root-name is an unspecified string + which does not appear in any pathnames. + + + + 30.10.10.1 [fs.enum.path.format] + The character sequence is always interpreted in the native pathname + format. + + + + 30.10.15.4 [fs.op.file_size] + If !is_regular_file(p), an error is reported. diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2020.xml b/libstdc++-v3/doc/xml/manual/status_cxx2020.xml new file mode 100644 index 00000000000..67353850ce5 --- /dev/null +++ b/libstdc++-v3/doc/xml/manual/status_cxx2020.xml @@ -0,0 +1,980 @@ +

+ + +C++ 202a + + ISO C++ + 2020 + + + + +In this implementation the -std=gnu++2a or +-std=c++2a flag must be used to enable language +and library +features. See dialect +options. The pre-defined symbol +__cplusplus is used to check for the +presence of the required flag. + + + +This section describes the C++20 and library TS support in mainline GCC SVN, +not in any particular release. + + + +The following table lists new library features that have been accepted into +the C++2a working draft. The "Proposal" column provides a link to the +ISO C++ committee proposal that describes the feature, while the "Status" +column indicates the first version of GCC that contains an implementation of +this feature (if it has been implemented). +The "SD-6 Feature Test" column shows the corresponding macro or header from +SD-6: +Feature-testing recommendations for C++. + + + +C++ 2020 Implementation Status + + + + + + + + + Library Feature + Proposal + Status + SD-6 Feature Test + + + + + + + Endian just Endian + + + P0463R1 + + + 8.1 + + + + + + Extending make_shared to Support Arrays + + + P0674R1 + + + + + + + + + Floating Point Atomic + + + P0020R6 + + + + + + + + + C++ Synchronized Buffered Ostream + + + P0053R7 + + + + + + + + + Add constexpr modifiers to functions in <algorithm> and <utility> Headers + + + P0202R3 + + + + + + + + Constexpr for std::complex + + + P0415R1 + + + 9.1 + + + + + + Make std::memory_order a scoped enumeration + + + P0439R0 + + + + + + + + String Prefix and Suffix Checking + + + P0457R2 + + + 9.1 + + + + + Transformation Trait remove_cvref + + + P0550R2 + + + 9.1 + + + + + + nodiscard in the Library + + + P0600R1 + + + + + + + + + de-pessimize legacy algorithms with std::move + + + P0616R0 + + + + + + + + Utility to convert a pointer to a raw pointer + + + P0653R2 + + + 8.1 + + + + + + Atomic shared_ptr + + + P0718R2 + + + + + + + + + Deprecate POD + + + P0767R1 + + + + + + + + + Library Support for the Spaceship (Comparison) Operator + + + P0768R1 + + + + + + + + + Treating Unnecessary decay + + + P0777R1 + + + + + + + + + <span> + + + P0122R7 + + + + + + + + + Extending chrono to Calendars and Time Zones + + + P0355R7 + + + + + + + + + Thou Shalt Not Specialize std Function Templates! + + + P0551R3 + + + + + + + + + Manipulators for C++ Synchronized Buffered Ostream + + + P0753R2 + + + + + + + + <version> + + + P0754R2 + + + 9.1 + + + + + + Comparing Unordered Containers + + + P0809R0 + + + + + + + + + Constexpr iterator requirements + + + P0858R0 + + + + + + + + + Symmetry for spaceship + + + P0905R1 + + + + + + + + + string::reserve Should Not Shrink + + + P0966R1 + + + + + + + + + Atomic Ref + + + P0019R8 + + + + + + + + Checking for Existence of an Element in Associative Containers + + + P0458R2 + + + 9.1 + + + + + LWG 2511: guaranteed copy elision for piecewise construction + + + P0475R1 + + + 7.1 + + + + + + Bit-casting object representations + + + P0476R2 + + + + + + + + + The Curious Case of Padding Bits, Featuring Atomic Compare-and-Exchange + + + P0528R3 + + + + + + + + + Support for contract based programming in C++ + + + P0542R5 + + + + + + + + Integral power-of-2 operations + + + P0556R3 + + + 9.1 + + + + + + Reviewing Deprecated Facilities of C++17 for C++20 + + + P0619R4 + + + + + + + + Improving the Return Value of Erase-Like Algorithms + + + P0646R1 + + + 9.1 + __cpp_lib_list_remove_return_type >= 201806L + + + + Efficient sized delete for variable sized classes + + + P0722R3 + + + 9.1 + __cpp_lib_destroying_delete >= 201806L + + + + Implicit conversion traits and utility functions + + + P0758R1 + + + 9.1 + + + + + fpos Requirements + + + P0759R1 + + + Note 1 + + + + + + Add shift to <algorithm> + + + P0769R2 + + + + + + + + + Standard Library Specification in a Concepts and Contracts World + + + P0788R3 + + + + + + + + + Constexpr for swap and swap related functions + + + P0879R0 + + + + + + + + + The identity metafunction + + + P0887R1 + + + + + + + + explicit(bool) + + + P0892R2 + + + Note 1 + + + + + + Standard Library Concepts + + + P0898R3 + + + + + + + + Eradicating unnecessarily explicit default constructors from the standard library + + + P0935R0 + + + 9.1 + + + + + Integrating feature-test macros into the C++ WD + + + P0941R2 + + + 5.1 + + + + + + constexpr comparison operators for std::array + + + P1023R0 + + + + + + + + + Update The Reference To The Unicode Standard + + + P1025R1 + + + + + + + + + Consistency improvements for <=> and other comparison operators + + + P1120R0 + + + + + + + + unwrap_ref_decay and unwrap_reference + + + P0318R1 + + + 9.1 + + + + + + Simplified partial function application + + + P0356R5 + + + + + + + + reference_wrapper for incomplete types + + + P0357R3 + + + 9.1 + + + + + + char8_t: A type for UTF-8 characters and strings + + + P0482R6 + + + + + + + + + Fixing operator>>(basic_istream&, CharT*) (LWG 2499) + + + P0487R1 + + + + + + + + + Utility functions to implement uses-allocator construction + + + P0591R4 + + + + + + + + P0595R2 std::is_constant_evaluated() + + + P0595R2 + + + 9.1 + + + + + variant and optional should propagate copy/move triviality + + + P0602R4 + + + 8.3 + + + + + + A sane variant converting constructor + + + P0608R3 + + + + + + + + + visit<R>: Explicit Return Type for visit + + + P0655R1 + + + + + + + + std::function move constructor should be noexcept + + + P0771R1 + + + 7.2 + + + + + + The One Ranges Proposal + + + P0896R4 + + + + + + + + P0899R1 - LWG 3016 is not a defect + + + P0899R1 + + + 7.1 + + + + + + Heterogeneous lookup for unordered containers + + + P0919R3 + + + + + + + + <chrono> zero(), min(), and max() should be noexcept + + + P0972R0 + + + 9.1 + + + + + + Constexpr in std::pointer_traits + + + P1006R1 + + + + + + + + + std::assume_aligned + + + P1007R3 + + + + + + + + + Smart pointer creation with default initialization + + + P1020R1 + + + + + + + + + Misc constexpr bits + + + P1032R1 + + + + + + + + + Should Span be Regular? + + + P1085R2 + + + + + + + + + Editorial Guidance for merging P0019r8 and P0528r3 + + + P1123R0 + + + + + + + + + Cleaning up Clause 20 + + + P1148R0 + + + + + + + + + Make stateful allocator propagation more consistent for operator+(basic_string) + + + P1165R1 + + + + + + + + Adopt Consistent Container Erasure from Library Fundamentals 2 for C++20 + + + P1209R0 + + + 9.1 + __cpp_lib_erase_if >= 201811L + + + + + Completing the Rebase of Library Fundamentals, Version 3, Working Draft + + + P1210R0 + + + + + + + + + Alternative Wording for P0907R4 Signed Integers are Two's Complement + + + P1236R1 + + + + + + + + + Remove CommonReference requirement from StrictWeakOrdering (a.k.a Fixing Relations) + + + P1248R1 + + + + + + + + + Improving Completeness Requirements for Type Traits + + + P1285R0 + + + + + + + + + Missing feature test macros + + + P1353R0 + + + Partial + + + + +

+ + +Note 1: The changes in the proposal either do not affect the code in libstdc++, +or the changes are not required for conformance. + + + +

Implementation Specific Behavior + + For behaviour which is also specified by previous standards, + see C++ 1998/2003 Implementation + Specific Behavior, C++ + 2011 Implementation Specific Behavior and C++ 2017 Implementation Specific + Behavior. + This section only documents behaviour which is new in the 202a draft. + + + +

+ +

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The GNU C++ Library ManualÂ	Home	Â ChapterÂ 1.Â Status

PartÂ I.Â Introduction -

ChapterÂ 1.Â Status

Implementation Status

C++ 1998/2003

Implementation Status

ChapterÂ 1.Â Status

Implementation Status

C++ 1998/2003

Implementation Status

C++ 202a

Implementation Specific Behavior

C++ TR1

Implementation Specific Behavior