Experimental C++ Standard Library headers

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General 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)

Concurrency support library (C++11)

Technical specifications

Symbols index

External libraries

 

Standard library headers

Language support
<cstddef> <cstdlib> <version> (C++20) <limits> <climits>	<cfloat> <cstdint> (C++11) <stdfloat> (C++23) <new> <typeinfo>	<source_location> (C++20) <exception> <initializer_list> (C++11) <compare> (C++20)	<coroutine> (C++20) <csignal> <csetjmp> <cstdarg>
Concepts
<concepts> (C++20)
Diagnostics
<stdexcept> <stacktrace> (C++23)	<cassert>	<cerrno>	<system_error> (C++11)
Memory management
<memory>	<memory_resource> (C++17)	<scoped_allocator> (C++11)
Metaprogramming
<type_traits> (C++11)	<ratio> (C++11)
General utilities
<utility> <tuple> (C++11) <optional> (C++17) <variant> (C++17)	<any> (C++17) <expected> (C++23) <bitset>	<functional> <typeindex> (C++11) <execution> (C++17)	<charconv> (C++17) <format> (C++20) <bit> (C++20)
Strings
<string_view> (C++17) <string>	<cctype> <cwctype>	<cstring> <cwchar>	<cuchar> (C++11)
Containers
<array> (C++11) <deque> <forward_list> (C++11) <list>	<vector> <map> <set> <unordered_map> (C++11)	<unordered_set> (C++11) <queue> <stack> <flat_map> (C++23)	<flat_set> (C++23) <span> (C++20) <mdspan> (C++23)
Iterators
<iterator>
Ranges
<ranges> (C++20)	<generator> (C++23)
Algorithms
<algorithm>	<numeric>
Numerics
<cfenv> (C++11) <complex>	<random> (C++11) <valarray>	<cmath>	<numbers> (C++20)
Time
<chrono> (C++11)	<ctime>
Localization
<locale>	<clocale>	<codecvt> (C++11/17*)
Input/output
<iosfwd> <iostream> <ios> <streambuf>	<istream> <ostream> <iomanip> <print> (C++23)	<sstream> <spanstream> (C++23) <fstream> <syncstream> (C++20)	<filesystem> (C++17) <cstdio> <cinttypes> (C++11) <strstream> (C++98*)
Regular expressions
<regex> (C++11)
Concurrency support
<stop_token> (C++20) <thread> (C++11) <atomic> (C++11)	<stdatomic.h> (C++23) <mutex> (C++11) <shared_mutex> (C++14)	<condition_variable> (C++11)   <semaphore> (C++20) <latch> (C++20)	<barrier> (C++20) <future> (C++11)
C compatibility
<cstdbool> (C++11/17/20*)   <ccomplex> (C++11/17/20*)	<ctgmath> (C++11/17/20*)	<cstdalign> (C++11/17/20*)	<ciso646> (until C++20)

 

Experimental library headers

Filesystem TS
<experimental/filesystem>
Parallelism TS (v1, v2)
<experimental/algorithm> <experimental/execution_policy> <experimental/exception_list>	<experimental/numeric> <experimental/simd> <experimental/task_block>
Library Fundamentals TS (v1, v2, v3)
<experimental/algorithm> <experimental/any> <experimental/array> <experimental/chrono> <experimental/deque> <experimental/forward_list> <experimental/functional> <experimental/future> <experimental/iterator> <experimental/list> <experimental/map> <experimental/memory> <experimental/memory_resource> <experimental/numeric> <experimental/optional> <experimental/propagate_const>	<experimental/random> <experimental/ratio> <experimental/regex> <experimental/scope> <experimental/set> <experimental/source_location> <experimental/string> <experimental/string_view> <experimental/system_error> <experimental/tuple> <experimental/type_traits> <experimental/unordered_map> <experimental/unordered_set> <experimental/utility> <experimental/vector>
Concurrency TS
<experimental/atomic> <experimental/barrier>	<experimental/future> <experimental/latch>
Ranges TS
<experimental/ranges/algorithm> <experimental/ranges/concepts> <experimental/ranges/functional>      <experimental/ranges/iterator>	<experimental/ranges/random> <experimental/ranges/tuple> <experimental/ranges/type_traits> <experimental/ranges/utility>
Coroutines TS
<experimental/coroutine>
Networking TS
<experimental/buffer> <experimental/executor> <experimental/internet> <experimental/io_context>	<experimental/net> <experimental/netfwd> <experimental/socket> <experimental/timer>
Reflection TS
<experimental/reflect>

 

The interface of Experimental C++ standard libraries (i.e. libraries introduced by C++ TR's/TS's) is defined by the following collection of headers.

Filesystem TS
<experimental/filesystem> (filesystem TS)	Filesystem library
Parallelism TS
<experimental/algorithm> (parallelism TS)	Non-numeric parallel algorithms
<experimental/execution_policy> (parallelism TS)	Execution policies
<experimental/exception_list> (parallelism TS)	Parallel exceptions
<experimental/numeric> (parallelism TS)	Numeric parallel algorithms
Library Fundamentals TS
<experimental/algorithm> (library fundamentals TS)	sample and search
<experimental/any> (library fundamentals TS)	any
<experimental/chrono> (library fundamentals TS)	Variable templates for type traits
<experimental/deque> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/forward_list> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/future> (library fundamentals TS)	promise and packaged_task using polymorphic allocators
<experimental/list> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/functional> (library fundamentals TS)	function using polymorphic allocators and searchers
<experimental/map> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/memory> (library fundamentals TS)	shared_ptr and weak_ptr with array support
<experimental/memory_resource> (library fundamentals TS)	Polymorphic allocators and memory resources
<experimental/optional> (library fundamentals TS)	optional
<experimental/ratio> (library fundamentals TS)	Variable templates for type traits
<experimental/regex> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/set> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/string> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/string_view> (library fundamentals TS)	basic_string_view
<experimental/system_error> (library fundamentals TS)	Variable templates for type traits
<experimental/tuple> (library fundamentals TS)	Variable templates for type traits and apply
<experimental/type_traits> (library fundamentals TS)	Variable templates for type traits and invocation_type
<experimental/unordered_map> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/unordered_set> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
<experimental/utility> (library fundamentals TS)	erased_type
<experimental/vector> (library fundamentals TS)	Convenience aliases for containers using polymorphic allocators
Concurrency TS
<experimental/atomic> (concurrency TS)	atomic_shared_ptr and atomic_weak_ptr
<experimental/barrier> (concurrency TS)	barrier and flex_barrier
<experimental/future> (concurrency TS)	Extensions for std::future
<experimental/latch> (concurrency TS)	latch
Library Fundamentals TS v2
<experimental/algorithm> (library fundamentals TS v2)	sample and shuffle
<experimental/array> (library fundamentals TS v2)	make_array and to_array
<experimental/deque> (library fundamentals TS v2)	erase and erase_if
<experimental/forward_list> (library fundamentals TS v2)	erase and erase_if
<experimental/functional> (library fundamentals TS v2)	not_fn
<experimental/iterator> (library fundamentals TS v2)	ostream_joiner
<experimental/list> (library fundamentals TS v2)	erase and erase_if
<experimental/map> (library fundamentals TS v2)	erase_if and erase_if
<experimental/memory> (library fundamentals TS v2)	observer_ptr
<experimental/numeric> (library fundamentals TS v2)	gcd and lcm
<experimental/propagate_const> (library fundamentals TS v2)	propagate_const
<experimental/random> (library fundamentals TS v2)	randint and reseed
<experimental/set> (library fundamentals TS v2)	erase_if and erase_if
<experimental/source_location> (library fundamentals TS v2)	source_location
<experimental/string> (library fundamentals TS v2)	erase and erase_if
<experimental/type_traits> (library fundamentals TS v2)	Metafunctions and detection idiom
<experimental/unordered_map> (library fundamentals TS v2)	erase_if and erase_if
<experimental/unordered_set> (library fundamentals TS v2)	erase_if and erase_if
<experimental/vector> (library fundamentals TS v2)	erase and erase_if
Ranges TS
<experimental/ranges/algorithm> (ranges TS)	Algorithms library
<experimental/ranges/concepts> (ranges TS)	Concepts library
<experimental/ranges/functional> (ranges TS)	Function objects
<experimental/ranges/iterator> (ranges TS)	Iterators library
<experimental/ranges/random> (ranges TS)	UniformRandomNumberGenerator concept
<experimental/ranges/range> (ranges TS)	Ranges library
<experimental/ranges/tuple> (ranges TS)	Tagged tuples
<experimental/ranges/type_traits> (ranges TS)	Metaprogramming and type traits
<experimental/ranges/utility> (ranges TS)	Utility components
Networking TS
<experimental/buffer> (networking TS)	Buffers
<experimental/executor> (networking TS)	Asynchronous model
<experimental/internet> (networking TS)	Internet protocol
<experimental/io_context> (networking TS)	Basic I/O services
<experimental/net> (networking TS)	Convenience header that includes every other Networking TS header
<experimental/netfwd> (networking TS)	Contains forward declarations of major Networking TS components
<experimental/socket> (networking TS)	Sockets
<experimental/timer> (networking TS)	Timers
Parallelism TS v2
<experimental/algorithm> (parallelism TS v2)	Non-numeric parallel algorithms
<experimental/execution_policy> (parallelism TS v2)	unseq and vec policies
<experimental/simd> (parallelism TS v2)	Data-parallel types
<experimental/task_block> (parallelism TS v2)	Task block
Reflection TS
<experimental/reflect> (reflection TS)	Static reflection support library
Library Fundamentals TS v3
<experimental/scope> (library fundamentals TS v3)	scope_exit, scope_fail, scope_success and unique_resource