values-positive.hpp
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2008 00008 * 00009 * Last modified: 00010 * $Date: 2009-09-08 21:10:29 +0200 (Tue, 08 Sep 2009) $ by $Author: schulte $ 00011 * $Revision: 9692 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 namespace Gecode { namespace Iter { namespace Values { 00039 00046 template<class I, bool strict=false> 00047 class Positive { 00048 private: 00050 IsValueIter<I> _checkI; 00051 protected: 00053 I i; 00054 public: 00056 00057 00058 Positive(void); 00060 Positive(I& i); 00062 void init(I& i); 00064 00066 00067 00068 bool operator ()(void) const; 00070 void operator ++(void); 00072 00074 00075 00076 int val(void) const; 00078 }; 00079 00080 00081 template<class I, bool strict> 00082 forceinline 00083 Positive<I,strict>::Positive(void) {} 00084 00085 template<class I, bool strict> 00086 forceinline void 00087 Positive<I,strict>::init(I& i0) { 00088 i=i0; 00089 if (strict) { 00090 while (i() && (i.val() <= 0)) ++i; 00091 } else { 00092 while (i() && (i.val() < 0)) ++i; 00093 } 00094 } 00095 00096 template<class I, bool strict> 00097 forceinline 00098 Positive<I,strict>::Positive(I& i0) : i(i0) { 00099 if (strict) { 00100 while (i() && (i.val() <= 0)) ++i; 00101 } else { 00102 while (i() && (i.val() < 0)) ++i; 00103 } 00104 } 00105 00106 template<class I, bool strict> 00107 forceinline void 00108 Positive<I,strict>::operator ++(void) { 00109 ++i; 00110 } 00111 template<class I, bool strict> 00112 forceinline bool 00113 Positive<I,strict>::operator ()(void) const { 00114 return i(); 00115 } 00116 00117 template<class I, bool strict> 00118 forceinline int 00119 Positive<I,strict>::val(void) const { 00120 return i.val(); 00121 } 00122 00123 }}} 00124 00125 // STATISTICS: iter-any 00126