Chapter 1. Status

Chapter 1. Status
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C++ 1998/2003

Implementation Status

Chapter 1. Status

Implementation Status

C++ 1998/2003

Implementation Status

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

This section describes the C++ support in the GCC 12 release series, @@ -1257,8 +1257,8 @@ presence of the required flag. This section describes the C++20 and library TS support in the GCC 12 release series, not in any particular release.

-The following table lists new library features that have been accepted into -the C++20 working draft. The "Proposal" column provides a link to the +The following table lists new library features that are included in +the C++20 standard. 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). @@ -1359,10 +1359,10 @@ or any notes about the implementation. 10.1 __cpp_lib_atomic_float >= 201711L C++ Synchronized Buffered Ostream P0053R7 - 11 __cpp_lib_syncbuf >= 201711L Manipulators for C++ Synchronized Buffered Ostream + 11.1 __cpp_lib_syncbuf >= 201711L Manipulators for C++ Synchronized Buffered Ostream P0753R2 - 11 __cpp_lib_syncbuf >= 201803L Make std::memory_order a scoped enumeration + 11.1 __cpp_lib_syncbuf >= 201803L Make std::memory_order a scoped enumeration P0439R0 9.1 The Curious Case of Padding Bits, Featuring Atomic Compare-and-Exchange @@ -1443,7 +1443,7 @@ or any notes about the implementation. string::reserve Should Not Shrink P0966R1 - 11 char8_t: A type for UTF-8 characters and strings + 11.1 char8_t: A type for UTF-8 characters and strings P0482R6 9.1 __cpp_lib_char8_t >= 201811L char8_t backward compatibility remediation @@ -1570,7 +1570,7 @@ or any notes about the implementation. Bit-casting object representations P0476R2 - 11 __cpp_lib_bit_cast >= 201806L Integral power-of-2 operations + 11.1 __cpp_lib_bit_cast >= 201806L Integral power-of-2 operations P0556R3 9.1 __cpp_lib_int_pow2 >= 201806L (since 9.4, see Note 1) On the names of low-level bit manipulation functions @@ -1699,16 +1699,99 @@ or any notes about the implementation. 10.1 __cpp_lib_math_constants >= 201907L std::source_location P1208R6 - 11 + 11.1 __cpp_lib_source_location >= 201907L Efficient access to std::basic_stringbuf's Buffer P0408R7 - 11

+ 11.1

Note 1: This feature is supported in older releases but the __cpp_lib macro is not defined to the right value (or not defined at all) until the version shown in parentheses. -

C++ TR1

+

C++ 2023

+In this implementation the -std=gnu++23 or +-std=c++23 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++23 and library TS support in mainline GCC, +not in any particular release. +

+The following table lists new library features that have been accepted into +the C++23 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). +A dash (—) in the status column indicates that the changes in the proposal +either do not affect the code in libstdc++, or the changes are not required for conformance. +The "SD-6 Feature Test / Notes" column shows the corresponding macro or header from +SD-6: +Feature-testing recommendations for C++ (where applicable) +or any notes about the implementation. +

Table 1.10. C++ 2023 Library Features

Library Feature	Proposal	Status	SD-6 Feature Test / Notes
+ Ranges and Views +
Range constructor for std::string_view	+ + P1989R2 + +	11.1
`join_view` should join all views of ranges	+ + P2328R1 + +	11.2
Clarifying range adaptor objects	+ + P2281R1 + +	11.1
Views should not be required to be default constructible	+ + P2325R3 + +	11.3	`__cpp_lib_ranges >= 202106L`
Conditionally borrowed ranges	+ + P2017R1 + +	11.1
Require `span` & `basic_string_view` to be Trivially Copyable	+ + P2251R1 + +	Yes
+ Compile-time programming +
A proposal for a type trait to detect scoped enumerations	+ + P1048R1 + +	11.1	`__cpp_lib_is_scoped_enum >= 202011L`
std::to_underlying for enumerations	+ + P1682R3 + +	11.1	`__cpp_lib_to_underlying >= 202102L`
+ Strings and text +
string contains function	+ + P1679R3 + +	11.1	`__cpp_lib_string_contains >= 202011L`
+ Miscellaneous +
Inheriting from `std::variant`	+ + P2162R2 + +	11.3	`__cpp_lib_variant >= 202102L`
Printing `volatile` Pointers	+ + P1147R1 + +	11.3
Clarifying the status of the "C headers"	+ + P2340R1 + +	Yes
Relax Requirements for time_point::clock	+ + P2212R2 + +	Yes

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, "Draft Technical Report on C++ Library Extensions". @@ -1719,7 +1802,7 @@ In this implementation the header names are prefixed by

This page describes the TR1 support in the GCC 12 release series, not in any particular release. -

Table 1.10. C++ TR1 Implementation Status

Section Description Status Comments

2 General Utilities

2.1 Reference wrappers

2.1.1 Additions to header <functional> synopsis Y

2.1.2 Class template reference_wrapper

2.1.2.1 reference_wrapper construct/copy/destroy Y

2.1.2.2 reference_wrapper assignment Y

2.1.2.3 reference_wrapper access Y

2.1.2.4 reference_wrapper invocation Y

2.1.2.5 reference_wrapper helper functions Y

2.2 Smart pointers

2.2.1 Additions to header <memory> synopsis Y

2.2.2 Class bad_weak_ptr Y

2.2.3

Class template shared_ptr

+

Table 1.11. C++ TR1 Implementation Status

Section Description Status Comments

2 General Utilities

2.1 Reference wrappers

2.1.1 Additions to header <functional> synopsis Y

2.1.2 Class template reference_wrapper

2.1.2.1 reference_wrapper construct/copy/destroy Y

2.1.2.2 reference_wrapper assignment Y

2.1.2.3 reference_wrapper access Y

2.1.2.4 reference_wrapper invocation Y

2.1.2.5 reference_wrapper helper functions Y

2.2 Smart pointers

2.2.1 Additions to header <memory> synopsis Y

2.2.2 Class bad_weak_ptr Y

2.2.3

Class template shared_ptr

Uses code from boost::shared_ptr. @@ -1740,7 +1823,7 @@ decimal floating-point arithmetic".

This page describes the TR 24733 support in the GCC 12 release series, not in any particular release. -

Table 1.11. C++ TR 24733 Implementation Status

Section Description Status Comments

+

Table 1.12. C++ TR 24733 Implementation Status

Section Description Status Comments

0

Introduction @@ -1780,7 +1863,7 @@ 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. -

Table 1.12. C++ Special Functions Implementation Status

Section Description Status Comments

7

Macro names

Partial

No diagnostic for inconsistent definitions of +

Table 1.13. 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
8.1	Additions to header `<cmath>` synopsis	Y
8.1.1	associated Laguerre polynomials	Y
8.1.2	associated Legendre functions	Y
8.1.3	beta function	Y
8.1.4	(complete) elliptic integral of the first kind	Y
8.1.5	(complete) elliptic integral of the second kind	Y
8.1.6	(complete) elliptic integral of the third kind	Y
8.1.7	regular modified cylindrical Bessel functions	Y
8.1.8	cylindrical Bessel functions (of the first kind)	Y
8.1.9	irregular modified cylindrical Bessel functions	Y
8.1.10	cylindrical Neumann functions	Y
8.1.11	(incomplete) elliptic integral of the first kind	Y
8.1.12	(incomplete) elliptic integral of the second kind	Y
8.1.13	(incomplete) elliptic integral of the third kind	Y
8.1.14	exponential integral	Y
8.1.15	Hermite polynomials	Y
8.1.16	Laguerre polynomials	Y
8.1.17	Legendre polynomials	Y
8.1.18	Riemann zeta function	Y
8.1.19	spherical Bessel functions (of the first kind)	Y
8.1.20	spherical associated Legendre functions	Y
8.1.21	spherical Neumann functions	Y
8.2	Additions to header `<math.h>`	Y
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 548b632b6e4..290e5d3a74e 100644 --- a/libstdc++-v3/doc/xml/manual/intro.xml +++ b/libstdc++-v3/doc/xml/manual/intro.xml @@ -47,15 +47,19 @@ - + + + + + - + - + diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2020.xml b/libstdc++-v3/doc/xml/manual/status_cxx2020.xml index 97aac8babdc..a13445f2246 100644 --- a/libstdc++-v3/doc/xml/manual/status_cxx2020.xml +++ b/libstdc++-v3/doc/xml/manual/status_cxx2020.xml @@ -25,8 +25,8 @@ not in any particular release. -The following table lists new library features that have been accepted into -the C++20 working draft. The "Proposal" column provides a link to the +The following table lists new library features that are included in +the C++20 standard. 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). @@ -359,7 +359,7 @@ or any notes about the implementation. P0053R7 - 11 + 11.1 __cpp_lib_syncbuf >= 201711L @@ -369,7 +369,7 @@ or any notes about the implementation. P0753R2 - 11 + 11.1 __cpp_lib_syncbuf >= 201803L @@ -643,7 +643,7 @@ or any notes about the implementation. P0966R1 - 11 + 11.1 @@ -1039,7 +1039,7 @@ or any notes about the implementation. P0476R2 - 11 + 11.1 __cpp_lib_bit_cast >= 201806L @@ -1424,7 +1424,7 @@ or any notes about the implementation. P1208R6 - 11 + 11.1 __cpp_lib_source_location >= 201907L @@ -1436,7 +1436,7 @@ or any notes about the implementation. P0408R7 - 11 + 11.1 diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2023.xml b/libstdc++-v3/doc/xml/manual/status_cxx2023.xml new file mode 100644 index 00000000000..f1244da9dc8 --- /dev/null +++ b/libstdc++-v3/doc/xml/manual/status_cxx2023.xml @@ -0,0 +1,232 @@ +

+ + +C++ 2023 + + ISO C++ + 2023 + + + + +In this implementation the -std=gnu++23 or +-std=c++23 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++23 and library TS support in mainline GCC, +not in any particular release. + + + +The following table lists new library features that have been accepted into +the C++23 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). +A dash (—) in the status column indicates that the changes in the proposal +either do not affect the code in libstdc++, or the changes are not required for conformance. +The "SD-6 Feature Test / Notes" column shows the corresponding macro or header from +SD-6: +Feature-testing recommendations for C++ (where applicable) +or any notes about the implementation. + + + +C++ 2023 Library Features + + + + + + + + + Library Feature + Proposal + Status + SD-6 Feature Test / Notes + + + + + + + + Ranges and Views + + + + + Range constructor for std::string_view + + + P1989R2 + + + 11.1 + + + + + join_view should join all views of ranges + + + P2328R1 + + + 11.2 + + + + + + Clarifying range adaptor objects + + + P2281R1 + + + 11.1 + + + + + Views should not be required to be default constructible + + + P2325R3 + + + 11.3 + __cpp_lib_ranges >= 202106L + + + + Conditionally borrowed ranges + + + P2017R1 + + + 11.1 + + + + + Require span & basic_string_view to be Trivially Copyable + + + P2251R1 + + + Yes + + + + + + Compile-time programming + + + + + A proposal for a type trait to detect scoped enumerations + + + P1048R1 + + + 11.1 + __cpp_lib_is_scoped_enum >= 202011L + + + + std::to_underlying for enumerations + + + P1682R3 + + + 11.1 + __cpp_lib_to_underlying >= 202102L + + + + + Strings and text + + + + + string contains function + + + P1679R3 + + + 11.1 + __cpp_lib_string_contains >= 202011L + + + + + Miscellaneous + + + + + Inheriting from std::variant + + + P2162R2 + + + 11.3 + __cpp_lib_variant >= 202102L + + + + Printing volatile Pointers + + + P1147R1 + + + 11.3 + + + + + Clarifying the status of the "C headers" + + + P2340R1 + + + Yes + + + + + Relax Requirements for time_point::clock + + + P2212R2 + + + Yes + + + + + +

+ +

Part I. Introduction -

Chapter 1. Status

Implementation Status

C++ 1998/2003

Implementation Status

Chapter 1. Status

Implementation Status

C++ 1998/2003

Implementation Status

C++ TR1

C++ 2023

C++ TR1

Implementation Specific Behavior