src/FbTk/STLUtil.hh (raw)
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// STLUtil.cc for FbTk // Copyright (c) 2006 Fluxbox Team (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_STLUTIL_HH #define FBTK_STLUTIL_HH /// contains useful utilities for STL namespace FbTk { namespace STLUtil { template<bool C, typename Ta, typename Tb> struct IfThenElse; template<typename Ta, typename Tb> struct IfThenElse<true, Ta, Tb> { Ta& operator ()(Ta& ta, Tb& tb) const { return ta; } typedef Ta ResultType; }; template<typename Ta, typename Tb> struct IfThenElse<false, Ta, Tb> { Tb& operator ()(Ta& ta, Tb& tb) const { return tb; } typedef Tb ResultType; }; /// calls delete on each item in the container and then clears the container template <typename A> void destroyAndClear(A &a) { typedef typename A::iterator iterator; iterator it = a.begin(); iterator it_end = a.end(); for (; it != it_end; ++it) delete (*it); a.clear(); } /// calls delete on each item value in the map and then clears the map template <typename A> void destroyAndClearSecond(A &a) { typedef typename A::iterator iterator; iterator it = a.begin(); iterator it_end = a.end(); for (; it != it_end; ++it) delete it->second; a.clear(); } template <typename C, typename F> F forAll(C& c, F f) { typedef typename C::iterator iterator; iterator i = c.begin(); iterator e = c.end(); for (; i != e; i++) { f(*i); } return f; } template <typename C, typename I, typename F> F forAllIf(C& c, I i, F f) { typedef typename C::iterator iterator; iterator it = c.begin(); iterator end = c.end(); for (; it != end; ++it) { if (i(*it)) f(*it); } return f; } } // end namespace STLUtil } // end namespace FbTk #endif // STLUTIL_Hh |