C++ standard libraries extensions, version 3

 

C++

Language

Standard Library Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical Specifications

 

Technical specifications

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Concepts (concepts TS)

Ranges (ranges TS)

Mathematical special functions (special functions TR)

 

Library fundamentals v3

experimental::scope_exit

experimental::scope_fail

experimental::scope_success

experimental::unique_resource

 

Version 3 of the C++ Extensions for Library Fundamentals, defines the following new components for the C++ standard library, in addition to those defined in version 1 and version 2.

std::experimental::make_array and components merged into C++17/20 are excluded from LFTS v3.

Scope guard

Defined in header <experimental/scope>
scope_exit	wraps a function object and invokes it on exiting the scope (class template)
scope_fail	wraps a function object and invokes it on exiting the scope through an exception (class template)
scope_success	wraps a function object and invokes it on exiting the scope normally (class template)
unique_resource	universal RAII resource handle wrapper (class template)

Feature test macros

Defined in header <experimental/scope>
__cpp_lib_experimental_scope	a value of at least 201902 indicates that the scope guard are supported (macro constant)