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/*
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Hewlett-Packard Company makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#ifndef PROJECTN_H
#define PROJECTN_H
#include <function.h>
template <class T, class U>
struct select1st : public unary_function<T, U> {
const U& operator()(const T& x) const { return x.first; }
};
template <class T, class U>
struct ident : public unary_function<T, U> {
const U& operator()(const T& x) const { return x; }
};
#endif
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