std::experimental::function
From cppreference.com
< cpp | experimental
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)
Experimental
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)
Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
Ranges (ranges TS)
Reflection (reflection TS)
Mathematical special functions (special functions TR)
Polymorphic allocator library
Memory resource classes
Global memory resources
Type-erased allocator support for existing classes
function
Defined in header
<experimental/functional>
template< class >
class function; /* undefined */
(library fundamentals TS)
class function; /* undefined */
template< class R, class... Args >
class function<R(Args...)>
(library fundamentals TS)
class function<R(Args...)>
std::experimental::function is a modified version of std::function with support for type-erased allocators.
Contents
[edit] Member types
Type
Definition
allocator_type
std::pmr::polymorphic_allocator <>
(library fundamentals TS v3)[edit] Member functions
(removed in library fundamentals TS v3)
(public member function) [edit]
(library fundamentals TS v3)
(public member function) [edit]
[edit] Non-member functions
(removed in library fundamentals TS v3)
(function template) [edit]
[edit] Helper classes
(removed in library fundamentals TS v3)
(class template specialization) [edit]
Members identical to std::function
Member types
Type
Definition
result_type
R
Member types removed in Library Fundamental TS v3
argument_type
T if sizeof...(Args) == 1 and T is the first and only type in Args...
first_argument_type
T1 if sizeof...(Args) == 2 and T1 is the first of the two types in Args...
second_argument_type
T2 if sizeof...(Args) == 2 and T2 is the second of the two types in Args...
Member types argument_type, first_argument_type, and second_argument_type are removed, because the correponding member types of std::function are removed in C++20.
Member functions
Target access
obtains the typeid of the stored target
(public member function of
(public member function of
std::function<R(Args...)>) [edit]