val-sel.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2012
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.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
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namespace Gecode { namespace Int { namespace Branch {
template<class View>
forceinline
ValSelMin<View>::ValSelMin
(Space& home, const ValBranch<ValSelMin<View>::Var>& vb)
: ValSel<View,int>(home,vb) {}
template<class View>
forceinline
ValSelMin<View>::ValSelMin(Space& home, ValSelMin& vs)
: ValSel<View,int>(home,vs) {}
template<class View>
forceinline int
ValSelMin<View>::val(const Space&, View x, int) {
return x.min();
}
template<class View>
forceinline
ValSelMax<View>::ValSelMax
(Space& home, const ValBranch<ValSelMax<View>::Var>& vb)
: ValSel<View,int>(home,vb) {}
template<class View>
forceinline
ValSelMax<View>::ValSelMax(Space& home, ValSelMax& vs)
: ValSel<View,int>(home,vs) {}
template<class View>
forceinline int
ValSelMax<View>::val(const Space&, View x, int) {
return x.max();
}
template<class View>
forceinline
ValSelMed<View>::ValSelMed
(Space& home, const ValBranch<ValSelMed<View>::Var>& vb)
: ValSel<View,int>(home,vb) {}
template<class View>
forceinline
ValSelMed<View>::ValSelMed(Space& home, ValSelMed& vs)
: ValSel<View,int>(home,vs) {}
template<class View>
forceinline int
ValSelMed<View>::val(const Space&, View x, int) {
return x.med();
}
template<class View>
forceinline
ValSelAvg<View>::ValSelAvg
(Space& home, const ValBranch<ValSelAvg<View>::Var>& vb)
: ValSel<View,int>(home,vb) {}
template<class View>
forceinline
ValSelAvg<View>::ValSelAvg(Space& home, ValSelAvg& vs)
: ValSel<View,int>(home,vs) {}
template<class View>
forceinline int
ValSelAvg<View>::val(const Space&, View x, int) {
return (x.width() == 2U) ? x.min() : ((x.min()+x.max()) / 2);
}
template<class View>
forceinline
ValSelRnd<View>::ValSelRnd
(Space& home, const ValBranch<ValSelRnd<View>::Var>& vb)
: ValSel<View,int>(home,vb), r(vb.rnd()) {}
template<class View>
forceinline
ValSelRnd<View>::ValSelRnd(Space& home, ValSelRnd& vs)
: ValSel<View,int>(home,vs), r(vs.r) {
}
template<class View>
forceinline int
ValSelRnd<View>::val(const Space&, View x, int) {
unsigned int p = r(x.size());
for (ViewRanges<View> i(x); i(); ++i) {
if (i.width() > p)
return i.min() + static_cast<int>(p);
p -= i.width();
}
GECODE_NEVER;
return 0;
}
template<class View>
forceinline bool
ValSelRnd<View>::notice(void) const {
return true;
}
template<class View>
forceinline void
ValSelRnd<View>::dispose(Space&) {
r.~Rnd();
}
forceinline
ValSelRangeMin::ValSelRangeMin
(Space& home, const ValBranch<IntVar>& vb)
: ValSel<IntView,int>(home,vb) {}
forceinline
ValSelRangeMin::ValSelRangeMin(Space& home, ValSelRangeMin& vs)
: ValSel<IntView,int>(home,vs) {}
forceinline int
ValSelRangeMin::val(const Space&, IntView x, int) {
if (x.range()) {
return (x.width() == 2) ? x.min() : (x.min() + (x.max()-x.min())/2);
} else {
ViewRanges<View> r(x);
return r.max();
}
}
forceinline
ValSelRangeMax::ValSelRangeMax(Space& home, const ValBranch<IntVar>& vb)
: ValSel<IntView,int>(home,vb) {}
forceinline
ValSelRangeMax::ValSelRangeMax(Space& home, ValSelRangeMax& vs)
: ValSel<IntView,int>(home,vs) {}
forceinline int
ValSelRangeMax::val(const Space&, IntView x, int) {
if (x.range()) {
return (x.width() == 2) ? x.max() : (x.max() - (x.max()-x.min())/2);
} else {
int min;
ViewRanges<IntView> r(x);
do {
min = r.min(); ++r;
} while (r());
return min;
}
}
}}}
// STATISTICS: int-branch
Gecode::Int::Branch::ValSelAvg::ValSelAvg
ValSelAvg(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelAvg::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:92
Gecode::Int::Branch::ValSelMax::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:62
Gecode::Int::Branch::ValSelMax::ValSelMax
ValSelMax(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelMed::ValSelMed
ValSelMed(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelMed::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:77
Gecode::Int::Branch::ValSelMin::ValSelMin
ValSelMin(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelMin::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:47
Gecode::Int::Branch::ValSelRangeMax::val
int val(const Space &home, IntView x, int i)
Return value of integer view x at position i.
Definition val-sel.hpp:153
Gecode::Int::Branch::ValSelRangeMax::ValSelRangeMax
ValSelRangeMax(Space &home, const ValBranch< IntVar > &vb)
Constructor for initialization.
Definition val-sel.hpp:147
Gecode::Int::Branch::ValSelRangeMin::val
int val(const Space &home, IntView x, int i)
Return value of integer view x at position i.
Definition val-sel.hpp:137
Gecode::Int::Branch::ValSelRangeMin::ValSelRangeMin
ValSelRangeMin(Space &home, const ValBranch< IntVar > &vb)
Constructor for initialization.
Definition val-sel.hpp:131
Gecode::Int::Branch::ValSelRnd::val
int val(const Space &home, View x, int i)
Return value of view x at position i.
Definition val-sel.hpp:108
Gecode::Int::Branch::ValSelRnd::notice
bool notice(void) const
Whether dispose must always be called (that is, notice is needed).
Definition val-sel.hpp:120
Gecode::Int::Branch::ValSelRnd::r
Rnd r
The used random number generator.
Definition branch.hh:357
Gecode::Int::Branch::ValSelRnd::ValSelRnd
ValSelRnd(Space &home, const ValBranch< Var > &vb)
Constructor for initialization.
Gecode::Int::Branch::ValSelRnd::dispose
void dispose(Space &home)
Delete value selection.
Definition val-sel.hpp:125
Gecode::Int::IntView
Integer view for integer variables.
Definition view.hpp:129
Gecode::Int::IntView::min
int min(void) const
Return minimum of domain.
Definition int.hpp:58
Gecode::Int::IntView::width
unsigned int width(void) const
Return width of domain (distance between maximum and minimum).
Definition int.hpp:85
Gecode::Int::IntView::range
bool range(void) const
Test whether domain is a range.
Definition int.hpp:103
Gecode::Int::IntView::max
int max(void) const
Return maximum of domain.
Definition int.hpp:62
Gecode::Int::ViewRanges
Range iterator for integer views.
Definition view.hpp:54
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::ValBranch
Value branching information.
Definition val.hpp:41
Gecode::View
Gecode::ValSel
Base class for value selection.
Definition val-sel.hpp:44
Gecode::ValSel< View, int >::View
View View
Definition val-sel.hpp:47
Gecode::ValSel< View, int >::ValSel
ValSel(Space &home, const ValBranch< Var > &vb)
Definition val-sel.hpp:98
Gecode::ValSel< View, int >::Var
View::VarType Var
Definition val-sel.hpp:49
Gecode::Int::Branch
Integer branchers.
Gecode::Int
Finite domain integers.
Gecode
Gecode toplevel namespace
Gecode::min
void min(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition arithmetic.cpp:67
forceinline
#define forceinline
Definition config.hpp:187
GECODE_NEVER
#define GECODE_NEVER
Assert that this command is never executed.
Definition macros.hpp:56