diff --git a/include/boost/utility/compare_pointees.hpp b/include/boost/utility/compare_pointees.hpp new file mode 100644 index 0000000..ffafbe0 --- /dev/null +++ b/include/boost/utility/compare_pointees.hpp @@ -0,0 +1,71 @@ +// (C) 2002, Fernando Luis Cacciola Carballal. +// +// This material is provided "as is", with absolutely no warranty expressed +// or implied. Any use is at your own risk. +// +// Permission to use or copy this software for any purpose is hereby granted +// without fee, provided the above notices are retained on all copies. +// Permission to modify the code and to distribute modified code is granted, +// provided the above notices are retained, and a notice that the code was +// modified is included with the above copyright notice. +// +// 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 + diff --git a/include/boost/utility/none.hpp b/include/boost/utility/none.hpp new file mode 100644 index 0000000..f1a2844 --- /dev/null +++ b/include/boost/utility/none.hpp @@ -0,0 +1,34 @@ +// (C) 2002, Fernando Luis Cacciola Carballal. +// +// This material is provided "as is", with absolutely no warranty expressed +// or implied. Any use is at your own risk. +// +// Permission to use or copy this software for any purpose is hereby granted +// without fee, provided the above notices are retained on all copies. +// Permission to modify the code and to distribute modified code is granted, +// provided the above notices are retained, and a notice that the code was +// modified is included with the above copyright notice. +// +// You are welcome to contact the author at: +// fernando_cacciola@hotmail.com +// +#ifndef BOOST_UTILITY_NONE_17SEP2003_HPP +#define BOOST_UTILITY_NONE_17SEP2003_HPP + +#include "boost/detail/none_t.hpp" + +// NOTE: Borland users have to include this header outside any precompiled headers +// (bcc<=5.64 cannot include instance data in a precompiled header) + +namespace boost { + +namespace { + +detail::none_t const none = 0 ; + +} + +} // namespace boost + +#endif +