std::experimental::ranges::identity
From cppreference.com
< cpp | experimental | ranges
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)
General utilities library
Utility components
Function objects
Metaprogramming and type traits
Tagged pairs and tuples
Defined in header
<experimental/ranges/functional>
struct identity;
(ranges TS)
ranges::identity is a function object type whose operator() returns its argument unchanged. It is used as the default projection for all Ranges TS algorithms.
Contents
[edit] Nested types
Nested type
Definition
is_transparent
unspecified
[edit] Member functions
operator()
(public member function)
std::experimental::ranges::identity::operator()
template< class T >
constexpr T&& operator()( T&& t ) const noexcept;
constexpr T&& operator()( T&& t ) const noexcept;
Returns std::forward <T>(t).
Parameters
t
-
argument to return
Return value
std::forward <T>(t).
[edit] Example
This section is incomplete
Reason: no example
Reason: no example