forked from boostorg/utility
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
|
// boost utility.hpp header file -------------------------------------------//
|
||
|
|
|
||
|
|
// (C) Copyright boost.org 1999. Permission to copy, use, modify, sell
|
||
|
|
// and distribute this software is granted provided this copyright
|
||
|
|
// notice appears in all copies. This software is provided "as is" without
|
||
|
|
// express or implied warranty, and with no claim as to its suitability for
|
||
|
|
// any purpose.
|
||
|
|
|
||
|
|
// See http://www.boost.org for most recent version including documentation.
|
||
|
|
|
||
|
|
// Classes appear in alphabetical order
|
||
|
|
|
||
|
|
// Revision History
|
||
|
|
// 26 Jan 00 protected noncopyable destructor added (Miki Jovanovic)
|
||
|
|
// 10 Dec 99 next() and prior() templates added (Dave Abrahams)
|
||
|
|
// 30 Aug 99 moved cast templates to cast.hpp (Beman Dawes)
|
||
|
|
// 3 Aug 99 cast templates added
|
||
|
|
// 20 Jul 99 name changed to utility.hpp
|
||
|
|
// 9 Jun 99 protected noncopyable default ctor
|
||
|
|
// 2 Jun 99 Initial Version. Class noncopyable only contents (Dave Abrahams)
|
||
|
|
|
||
|
|
#ifndef BOOST_UTILITY_HPP
|
||
|
|
#define BOOST_UTILITY_HPP
|
||
|
|
|
||
|
|
#include <boost/config.hpp>
|
||
|
|
#include <cstddef> // for size_t
|
||
|
|
|
||
|
|
namespace boost
|
||
|
|
{
|
||
|
|
|
||
|
|
// next() and prior() template functions -----------------------------------//
|
||
|
|
|
||
|
|
// Helper functions for classes like bidirectional iterators not supporting
|
||
|
|
// operator+ and operator-.
|
||
|
|
//
|
||
|
|
// Usage:
|
||
|
|
// const std::list<T>::iterator p = get_some_iterator();
|
||
|
|
// const std::list<T>::iterator prev = boost::prior(p);
|
||
|
|
|
||
|
|
// Contributed by Dave Abrahams
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
T next(T x) { return ++x; }
|
||
|
|
|
||
|
|
template <class T>
|
||
|
|
T prior(T x) { return --x; }
|
||
|
|
|
||
|
|
|
||
|
|
// class noncopyable -------------------------------------------------------//
|
||
|
|
|
||
|
|
// Private copy constructor and copy assignment ensure classes derived from
|
||
|
|
// class noncopyable cannot be copied.
|
||
|
|
|
||
|
|
// Contributed by Dave Abrahams
|
||
|
|
|
||
|
|
class noncopyable
|
||
|
|
{
|
||
|
|
protected:
|
||
|
|
noncopyable(){}
|
||
|
|
~noncopyable(){}
|
||
|
|
private: // emphasize the following members are private
|
||
|
|
noncopyable( const noncopyable& );
|
||
|
|
const noncopyable& operator=( const noncopyable& );
|
||
|
|
}; // noncopyable
|
||
|
|
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif // BOOST_UTILITY_HPP
|
||
|
|
|