1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/epoc32/include/stdapis/boost/utility/compare_pointees.hpp	Tue Mar 16 16:12:26 2010 +0000
     1.3 @@ -0,0 +1,68 @@
     1.4 +// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
     1.5 +//
     1.6 +// Use, modification, and distribution is subject to the Boost Software
     1.7 +// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
     1.8 +// http://www.boost.org/LICENSE_1_0.txt)
     1.9 +//
    1.10 +// See http://www.boost.org/lib/optional for documentation.
    1.11 +//
    1.12 +// You are welcome to contact the author at:
    1.13 +//  fernando_cacciola@hotmail.com
    1.14 +//
    1.15 +#ifndef BOOST_UTILITY_COMPARE_POINTEES_25AGO2003_HPP
    1.16 +#define BOOST_UTILITY_COMPARE_POINTEES_25AGO2003_HPP
    1.17 +
    1.18 +#include<functional>
    1.19 +
    1.20 +namespace boost {
    1.21 +
    1.22 +// template<class OP> bool equal_pointees(OP const& x, OP const& y);
    1.23 +// template<class OP> struct equal_pointees_t;
    1.24 +//
    1.25 +// Being OP a model of OptionalPointee (either a pointer or an optional):
    1.26 +//
    1.27 +// If both x and y have valid pointees, returns the result of (*x == *y)
    1.28 +// If only one has a valid pointee, returns false.
    1.29 +// If none have valid pointees, returns true.
    1.30 +// No-throw
    1.31 +template<class OptionalPointee>
    1.32 +inline
    1.33 +bool equal_pointees ( OptionalPointee const& x, OptionalPointee const& y )
    1.34 +{
    1.35 +  return (!x) != (!y) ? false : ( !x ? true : (*x) == (*y) ) ;
    1.36 +}
    1.37 +
    1.38 +template<class OptionalPointee>
    1.39 +struct equal_pointees_t : std::binary_function<OptionalPointee,OptionalPointee,bool>
    1.40 +{
    1.41 +  bool operator() ( OptionalPointee const& x, OptionalPointee const& y ) const
    1.42 +    { return equal_pointees(x,y) ; }
    1.43 +} ;
    1.44 +
    1.45 +// template<class OP> bool less_pointees(OP const& x, OP const& y);
    1.46 +// template<class OP> struct less_pointees_t;
    1.47 +//
    1.48 +// Being OP a model of OptionalPointee (either a pointer or an optional):
    1.49 +//
    1.50 +// If y has not a valid pointee, returns false.
    1.51 +// ElseIf x has not a valid pointee, returns true.
    1.52 +// ElseIf both x and y have valid pointees, returns the result of (*x < *y)
    1.53 +// No-throw
    1.54 +template<class OptionalPointee>
    1.55 +inline
    1.56 +bool less_pointees ( OptionalPointee const& x, OptionalPointee const& y )
    1.57 +{
    1.58 +  return !y ? false : ( !x ? true : (*x) < (*y) ) ;
    1.59 +}
    1.60 +
    1.61 +template<class OptionalPointee>
    1.62 +struct less_pointees_t : std::binary_function<OptionalPointee,OptionalPointee,bool>
    1.63 +{
    1.64 +  bool operator() ( OptionalPointee const& x, OptionalPointee const& y ) const
    1.65 +    { return less_pointees(x,y) ; }
    1.66 +} ;
    1.67 +
    1.68 +} // namespace boost
    1.69 +
    1.70 +#endif
    1.71 +