// CompareEqual.hh // Copyright (c) 2004 Henrik Kinnunen (fluxgen at fluxbox dot org) // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. #ifndef FBTK_COMPAREEQUAL_HH #define FBTK_COMPAREEQUAL_HH #include <functional> namespace FbTk { /// @brief compares one class function with a value type template <typename ClassType, typename ValueType> class CompareEqual_base: public std::unary_function<ClassType, bool> { public: typedef ValueType (ClassType::* Action)() const; typedef ValueType Value; CompareEqual_base(Action a, ValueType v):m_action(a), m_value(v) { } bool operator ()(const ClassType *instance) const { return (instance->*m_action)() == m_value; } private: Action m_action; Value m_value; }; // creates an CompareEqual_base object template <typename A, typename B> inline CompareEqual_base<A, B> CompareEqual(typename CompareEqual_base<A, B>::Action action, B b) { return CompareEqual_base<A, B>(action, b); } } // end namespace FbTk #endif // FBTK_COMPAREEQUAL_HH