vnl_identity.h

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#ifndef vnl_identity_h_
#define vnl_identity_h_
// This is vxl/vnl/vnl_identity.h

//: \file
//  \author Andrew W. Fitzgibbon, Oxford RRG, 07 Dec 98

// Modification
// LSB (Manchester) 23/1/01 Tidied documentation
//-----------------------------------------------------------------------------

#include <vnl/vnl_unary_function.h>

template <class T>
class vnl_identity : public vnl_unary_function<T,T> {
public:
  vnl_unary_function<T,T>* Copy() const {
    vnl_identity<T>* copy = new vnl_identity<T>;
    *copy = *this;
    return copy;
  }

  T f(T const& x) {
    return x;
  }
};

#endif // vnl_identity_h_

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