ISO/IEC TS 19568:2024 PDF

Programming Languages — C++ Extensions for Library Fundamentals

Название (английский):

ISO/IEC TS 19568:2024

Programming Languages — C++ Extensions for Library Fundamentals

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 54
Дата публикации:: 26 августа 2024 г.
Издание:: ISO/IEC TS 19568 edition 3 version 1
ICS:: 35.060

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Описание (английский):

This document describes extensions to the C++ Standard Library (2). These extensions are classes and functions that are likely to be used widely within a program and/or on the interface boundaries between libraries written by different organizations. It is intended that some of the library components be considered for standardization in a future version of C++. At present, they are not part of any C++ standard. The goal of this document is to build more widespread existing practice for an expanded C++ standard library. It gives advice on extensions to those vendors who wish to provide them.

Технические детали

Технический комитет: ISO/IEC JTC 1/SC 22 - Programming languages, their environments and system software interfaces
SKU: ISO/IEC TS 19568:2024

Abstract

Overview - ISO/IEC TS 19568:2024 (C++ Extensions for Library Fundamentals)

ISO/IEC TS 19568:2024 is a Technical Specification that documents experimental extensions to the C++ Standard Library (as defined in ISO/IEC 14882:2020). Published as the third edition (2024), the TS collects widely‑useful library components - classes and functions intended for use inside programs and at interface boundaries between libraries. These components live outside namespace std (typically in std::experimental::fundamentals_v3) and are candidates for future standardization in C++.

Key SEO keywords: ISO/IEC TS 19568:2024, C++ Extensions for Library Fundamentals, C++ Standard Library, std::experimental.

Key topics and technical requirements

Experimental headers and namespaces
- New/experimental headers reside under `` and many extensions are provided in std::experimental::fundamentals_v3.
- The document recommends feature‑test macros to indicate availability of implemented features.
Library areas covered (as listed in the TS)
- General utilities: e.g., propagate_const (constness propagation), scope guard support.
- Memory utilities: observer_ptr, memory resource/adaptor facilities.
- Function objects and type erasure: experimental function and related changes (now using polymorphic_allocator<> for type‑erasing classes).
- Iterators and algorithms: e.g., ostream_joiner, sampling and shuffle algorithms.
- Metaprogramming / type traits: extended ``, detection idiom.
- Numerics and random utilities: experimental random header and helpers (e.g., randint).
Standards practice
- The TS intentionally excludes features already adopted into the main standard (examples removed from this edition include optional, string_view, shared‑ownership pointers, memory_resource, search algorithm, and others).

Practical applications

Provides a standardized reference for vendors and library implementers who want to ship experimental but widely‑useful C++ library extensions.
Acts as a testbed for components likely to be proposed for future ISO C++ standardization.
Useful to application developers and library authors who need consistent, portable utilities for:
- Resource management (scope guards, unique_resource)
- Non‑owning pointer semantics (observer_ptr)
- Type traits and compile‑time detection idioms
- Extended algorithm and iterator helpers

Who should use this TS

C++ library implementers, compiler vendors, and toolchain authors.
Teams designing cross‑library APIs where stable, well‑documented utilities reduce integration friction.
Developers evaluating experimental standard library features before formal standard adoption.

Related standards

ISO/IEC 14882:2020 (Programming Languages - C++) - the base language standard referenced by this TS.

For implementers: follow the TS guidance on namespaces, headers, and feature‑test macros to maximize portability and readiness for possible future standardization.

Overview - ISO/IEC TS 19568:2024 (C++ Extensions for Library Fundamentals)

Key SEO keywords: ISO/IEC TS 19568:2024, C++ Extensions for Library Fundamentals, C++ Standard Library, std::experimental.

Key topics and technical requirements

Experimental headers and namespaces
- New/experimental headers reside under `` and many extensions are provided in std::experimental::fundamentals_v3.
- The document recommends feature‑test macros to indicate availability of implemented features.
Library areas covered (as listed in the TS)
- General utilities: e.g., propagate_const (constness propagation), scope guard support.
- Memory utilities: observer_ptr, memory resource/adaptor facilities.
- Function objects and type erasure: experimental function and related changes (now using polymorphic_allocator<> for type‑erasing classes).
- Iterators and algorithms: e.g., ostream_joiner, sampling and shuffle algorithms.
- Metaprogramming / type traits: extended ``, detection idiom.
- Numerics and random utilities: experimental random header and helpers (e.g., randint).
Standards practice
- The TS intentionally excludes features already adopted into the main standard (examples removed from this edition include optional, string_view, shared‑ownership pointers, memory_resource, search algorithm, and others).

Practical applications

Provides a standardized reference for vendors and library implementers who want to ship experimental but widely‑useful C++ library extensions.
Acts as a testbed for components likely to be proposed for future ISO C++ standardization.
Useful to application developers and library authors who need consistent, portable utilities for:
- Resource management (scope guards, unique_resource)
- Non‑owning pointer semantics (observer_ptr)
- Type traits and compile‑time detection idioms
- Extended algorithm and iterator helpers

Who should use this TS

C++ library implementers, compiler vendors, and toolchain authors.
Teams designing cross‑library APIs where stable, well‑documented utilities reduce integration friction.
Developers evaluating experimental standard library features before formal standard adoption.

Related standards

ISO/IEC 14882:2020 (Programming Languages - C++) - the base language standard referenced by this TS.

For implementers: follow the TS guidance on namespaces, headers, and feature‑test macros to maximize portability and readiness for possible future standardization.

ISO/IEC TS 19568:2024 PDF

Технические детали

Abstract

Overview - ISO/IEC TS 19568:2024 (C++ Extensions for Library Fundamentals)

Key topics and technical requirements

Practical applications

Who should use this TS

Related standards

Похожие стандарты

Abstract

Overview - ISO/IEC TS 19568:2024 (C++ Extensions for Library Fundamentals)

Key topics and technical requirements

Practical applications

Who should use this TS

Related standards

Похожие стандарты

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