diff -r 000000000000 -r e4d67989cc36 ossrv_pub/boost_apis/boost/utility/compare_pointees.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ossrv_pub/boost_apis/boost/utility/compare_pointees.hpp Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,68 @@ +// Copyright (C) 2003, Fernando Luis Cacciola Carballal. +// +// Use, modification, and distribution is subject to the Boost Software +// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// +// See http://www.boost.org/lib/optional for documentation. +// +// You are welcome to contact the author at: +// fernando_cacciola@hotmail.com +// +#ifndef BOOST_UTILITY_COMPARE_POINTEES_25AGO2003_HPP +#define BOOST_UTILITY_COMPARE_POINTEES_25AGO2003_HPP + +#include + +namespace boost { + +// template bool equal_pointees(OP const& x, OP const& y); +// template struct equal_pointees_t; +// +// Being OP a model of OptionalPointee (either a pointer or an optional): +// +// If both x and y have valid pointees, returns the result of (*x == *y) +// If only one has a valid pointee, returns false. +// If none have valid pointees, returns true. +// No-throw +template +inline +bool equal_pointees ( OptionalPointee const& x, OptionalPointee const& y ) +{ + return (!x) != (!y) ? false : ( !x ? true : (*x) == (*y) ) ; +} + +template +struct equal_pointees_t : std::binary_function +{ + bool operator() ( OptionalPointee const& x, OptionalPointee const& y ) const + { return equal_pointees(x,y) ; } +} ; + +// template bool less_pointees(OP const& x, OP const& y); +// template struct less_pointees_t; +// +// Being OP a model of OptionalPointee (either a pointer or an optional): +// +// If y has not a valid pointee, returns false. +// ElseIf x has not a valid pointee, returns true. +// ElseIf both x and y have valid pointees, returns the result of (*x < *y) +// No-throw +template +inline +bool less_pointees ( OptionalPointee const& x, OptionalPointee const& y ) +{ + return !y ? false : ( !x ? true : (*x) < (*y) ) ; +} + +template +struct less_pointees_t : std::binary_function +{ + bool operator() ( OptionalPointee const& x, OptionalPointee const& y ) const + { return less_pointees(x,y) ; } +} ; + +} // namespace boost + +#endif +