Experimental library header <experimental/ranges/functional>

 

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Feature test macros (C++20)

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Concepts library (C++20)

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Diagnostics library

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Strings library

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Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

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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>

 

This header is part of the ranges library.

Function objects

Defined in namespace std::experimental::ranges
invoke	invokes a Callable object with the given arguments (function template)
equal_to	function object implementing x == y (class template)
not_equal_to	function object implementing x != y (class template)
greater	function object implementing x > y (class template)
less	function object implementing x < y (class template)
greater_equal	function object implementing x >= y (class template)
less_equal	function object implementing x <= y (class template)
identity	function object that returns its argument unchanged (class)

Synopsis

namespace std { namespace experimental { namespace ranges { inline namespace v1 {
 
template <class F, class... Args>
std::result_of_t<F&&(Args&&...)> invoke(F&& f, Args&&... args);
 
template <class T = void>
  requires /* see definition */
struct equal_to;
 
template <class T = void>
  requires /* see definition */
struct not_equal_to;
 
template <class T = void>
  requires /* see definition */
struct greater;
 
template <class T = void>
  requires /* see definition */
struct less;
 
template <class T = void>
  requires /* see definition */
struct greater_equal;
 
template <class T = void>
  requires /* see definition */
struct less_equal;
 
template <> struct equal_to<void>;
template <> struct not_equal_to<void>;
template <> struct greater<void>;
template <> struct less<void>;
template <> struct greater_equal<void>;
template <> struct less_equal<void>;
 
struct identity;
 
}}}}