Experimental C++ Standard Library headers
From cppreference.com
 
 
 
 
 
 C++ 
 Feature test macros (C++20)
 Concepts library (C++20)
 Metaprogramming library (C++11)
 Ranges library (C++20)
 Filesystem library (C++17)
 Concurrency support library (C++11)
 Execution control library (C++26)
Standard library headers 
 
 
 
 
 
 
 
 
 
 <compare> (C++20)
 <contracts> (C++26)
 <coroutine> (C++20)
 <cstdint> (C++11)
 <source_location> (C++20)
 <stdfloat> (C++23)
 <version> (C++20)
 <concepts> (C++20)
 <debugging> (C++26)
 <stacktrace> (C++23)
 <system_error> (C++11)
 <memory_resource> (C++17)
 <scoped_allocator> (C++11)
 <type_traits> (C++11)
 <ratio> (C++11)
 <any> (C++17)
 <bit> (C++20)
 <charconv> (C++17)
 <expected> (C++23)
 <format> (C++20)
 <optional> (C++17)
 <stdbit.h> (C++26)
 <tuple> (C++11)
 <typeindex> (C++11)
 <variant> (C++17)
 <array> (C++11)
 <flat_map> (C++23)
 <flat_set> (C++23)
 <forward_list> (C++11)
 <hive> (C++26)
 <mdspan> (C++23)
 <span> (C++20)
 <unordered_map> (C++11)
 <unordered_set> (C++11)
 <generator> (C++23)
 <ranges> (C++20)
 <cuchar> (C++11)
 <string_view> (C++17)
 <codecvt> (C++11/17/26*)
 <regex> (C++11)
 <cfenv> (C++11)
 <linalg> (C++26)
 <numbers> (C++20)
 <random> (C++11)
 <simd> (C++26)
 <stdckdint.h> (C++26)
 <chrono> (C++11)
 <ccomplex> (C++11/17/20*)
 <ciso646> (until C++20)
 <cstdalign> (C++11/17/20*)
 <cstdbool> (C++11/17/20*)
 <ctgmath> (C++11/17/20*)
 <cinttypes> (C++11)
 <filesystem> (C++17)
 <print> (C++23)
 <spanstream> (C++23)
 <strstream> (C++98/26*)
 <syncstream> (C++20)
 <atomic> (C++11)
 <barrier> (C++20)
 <condition_variable> (C++11)
 <future> (C++11)
 <hazard_pointer> (C++26)
 <latch> (C++20)
 <mutex> (C++11)
 <rcu> (C++26)
 <semaphore> (C++20)
 <shared_mutex> (C++14)
 <stdatomic.h> (C++23)
 <stop_token> (C++20)
 <thread> (C++11)
 <execution> (C++17)
Experimental library headers
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Execution P2300 
 Filesystem TS
 Parallelism TS (v1, v2)
experimental/algorithmexperimental/execution_policyexperimental/exception_list Library Fundamentals TS (v1, v2, v3)
experimental/algorithmexperimental/arrayexperimental/chronoexperimental/dequeexperimental/forward_listexperimental/futureexperimental/iteratorexperimental/listexperimental/mapexperimental/memoryexperimental/numericexperimental/propagate_constexperimental/randomexperimental/ratioexperimental/regexexperimental/scopeexperimental/setexperimental/source_locationexperimental/stringexperimental/system_errorexperimental/tupleexperimental/type_traitsexperimental/unordered_mapexperimental/unordered_setexperimental/utilityexperimental/vector Concurrency TS
experimental/atomicexperimental/barrierexperimental/futureexperimental/latch Ranges TS
 Coroutines TS
experimental/coroutine Networking TS
experimental/bufferexperimental/executorexperimental/internetexperimental/io_context Reflection TS
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.
Contents
Execution P2300
Filesystem TS
Parallelism TS
Library Fundamentals TS
<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_resource>  (library fundamentals TS)
 Polymorphic allocators and memory resources
<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/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/vector>  (library fundamentals TS)
 Convenience aliases for containers using polymorphic allocators
Concurrency TS
Library Fundamentals TS v2
Ranges TS
Networking TS
<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/timer>  (networking TS)
 Timers
Parallelism TS v2
Reflection TS
Library Fundamentals TS v3
<experimental/scope>  (library fundamentals TS v3)
 scope_exit, scope_fail, scope_success and unique_resource