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Experimental library header
<experimental/optional>
From cppreference.com
<
cpp
|
header
|
experimental
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)
Diagnostics library
Memory management library
Metaprogramming library
(C++11)
General utilities library
Containers library
Iterators library
Ranges library
(C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library
(C++17)
Concurrency support library
(C++11)
Execution control library
(C++26)
Technical specifications
Symbols index
External libraries
[edit]
Standard library headers
Language support
<cfloat>
<climits>
<compare>
(C++20)
<contracts>
(C++26)
<coroutine>
(C++20)
<csetjmp>
<csignal>
<cstdarg>
<cstddef>
<cstdint>
(C++11)
<cstdlib>
<exception>
<initializer_list>
(C++11)
<limits>
<new>
<source_location>
(C++20)
<stdfloat>
(C++23)
<typeinfo>
<version>
(C++20)
Concepts
<concepts>
(C++20)
Diagnostics
<cassert>
<cerrno>
<debugging>
(C++26)
<stacktrace>
(C++23)
<stdexcept>
<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
<any>
(C++17)
<bitset>
<bit>
(C++20)
<charconv>
(C++17)
<expected>
(C++23)
<format>
(C++20)
<functional>
<optional>
(C++17)
<stdbit.h>
(C++26)
<tuple>
(C++11)
<typeindex>
(C++11)