std::experimental::ranges::identity
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                    < cpp | experimental | ranges
                    
                                                            
                    |   Defined in header  <experimental/ranges/functional>
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|   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.
Nested types
| Nested type | Definition | 
 is_transparent
 | 
unspecified | 
Member functions
|     operator()  | 
  returns the argument unchanged  (public member function)  | 
std::experimental::ranges::identity::operator()
|   template< class T > constexpr T&& operator()( T&& t ) const noexcept;  | 
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Returns std::forward<T>(t).
Parameters
| t | - | argument to return | 
Return value
std::forward<T>(t).
Example
| This section is incomplete Reason: no example  |