CGAL 6.1.2 - STL Extensions for CGAL: CGAL::Identity< Value > Struct Template Reference

CGAL 6.1.2 - STL Extensions for CGAL

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CGAL::Identity< Value > Struct Template Reference
Reference Manual » Projection Function Objects

`#include <CGAL/function_objects.h>`

## Definition

template<typename Value>
struct CGAL::Identity< Value >

The class `Identity` represents the identity function on `Value`.

Is model of
  `ProjectionObject`

## Public Types
typedef Value | argument_type
typedef Value | result_type

## Creation
| Identity ()
| default constructor.

## Operations
result_type & | operator() (argument_type &x) const
| returns `x`.
const result_type & | operator() (const argument_type &x) const
| returns `x`.