148 lines
4.7 KiB
C++
Executable File
148 lines
4.7 KiB
C++
Executable File
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main author:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2012
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace Gecode {
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/**
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* \defgroup TaskBranchValSel Generic value selection for brancher based on view and value selection
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*
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* \ingroup TaskBranchViewVal
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*/
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//@{
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/// Base class for value selection
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template<class View_, class Val_>
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class ValSel {
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public:
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/// View type
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typedef View_ View;
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/// Corresponding variable type
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typedef typename View::VarType Var;
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/// Value type
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typedef Val_ Val;
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public:
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/// Constructor for initialization
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ValSel(Space& home, const ValBranch<Var>& vb);
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/// Constructor for cloning
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ValSel(Space& home, ValSel<View,Val>& vs);
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/// Whether dispose must always be called (that is, notice is needed)
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bool notice(void) const;
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/// Delete value selection
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void dispose(Space& home);
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};
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/// User-defined value selection
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template<class View>
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class ValSelFunction :
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public ValSel<View,
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typename BranchTraits<typename View::VarType>::ValType> {
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public:
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/// The corresponding variable type
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using typename ValSel<View,
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typename BranchTraits<typename View::VarType>::ValType>::Var;
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/// The corresponding value type
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typedef typename ValSel<View,
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typename BranchTraits<typename View::VarType>
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::ValType>::Val Val;
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/// The corresponding value function
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typedef typename BranchTraits<Var>::Val ValFunction;
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protected:
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/// The user-defined value function
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SharedData<ValFunction> v;
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public:
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/// Constructor for initialization
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ValSelFunction(Space& home, const ValBranch<Var>& vb);
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/// Constructor for cloning
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ValSelFunction(Space& home, ValSelFunction<View>& vs);
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/// Return user-defined value of view \a x at position \a i
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Val val(const Space& home, View x, int i);
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/// Whether dispose must always be called (that is, notice is needed)
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bool notice(void) const;
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/// Delete value selection
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void dispose(Space& home);
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};
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//@}
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// Baseclass value selection
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template<class View, class Val>
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forceinline
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ValSel<View,Val>::ValSel(Space&, const ValBranch<Var>&) {}
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template<class View, class Val>
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forceinline
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ValSel<View,Val>::ValSel(Space&, ValSel<View,Val>&) {}
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template<class View, class Val>
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forceinline bool
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ValSel<View,Val>::notice(void) const {
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return false;
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}
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template<class View, class Val>
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forceinline void
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ValSel<View,Val>::dispose(Space&) {}
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// User-defined value selection
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template<class View>
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forceinline
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ValSelFunction<View>::ValSelFunction
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(Space& home, const ValBranch<Var>& vb)
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: ValSel<View,Val>(home,vb), v(vb.val()) {
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if (!v())
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throw InvalidFunction("ValSelFunction::ValSelFunction");
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}
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template<class View>
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forceinline
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ValSelFunction<View>::ValSelFunction(Space& home, ValSelFunction<View>& vs)
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: ValSel<View,Val>(home,vs), v(vs.v) {
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}
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template<class View>
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forceinline typename ValSelFunction<View>::Val
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ValSelFunction<View>::val(const Space& home, View x, int i) {
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typename View::VarType y(x.varimp());
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GECODE_VALID_FUNCTION(v());
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return v()(home,y,i);
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}
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template<class View>
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forceinline bool
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ValSelFunction<View>::notice(void) const {
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return true;
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}
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template<class View>
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forceinline void
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ValSelFunction<View>::dispose(Space&) {
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v.~SharedData<ValFunction>();
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}
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}
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// STATISTICS: kernel-branch
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