Boost C++ Libraries

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This is an older version of Boost and was released in 2023. The current version is 1.89.0.

Class template identity

Class template identity

boost::compute::identity

Synopsis

// In header: <boost/compute/functional/identity.hpp>

template<typename T> 
class identity {
public:
  // types
  typedef T result_type;  // Identity function result type. 

  // construct/copy/destruct
  identity();
};

Description

Identity function which simply returns its input.

For example, to directly copy values using the transform() algorithm:

transform(input.begin(), input.end(), output.begin(), identity<int>(), queue);

See Also:

as<T>, convert<T>

`identity` public construct/copy/destruct

```
identity();
```
Creates a new identity function.