purge.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, 2009
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
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namespace Gecode { namespace Int {
template<class OptTask, class PL>
ExecStatus
purge(Space& home, Propagator& p, TaskArray<OptTask>& t) {
int n=t.size();
for (int i=n; i--; )
if (t[i].excluded()) {
t[i].cancel(home,p,PL::pc); t[i]=t[--n];
}
t.size(n);
return (t.size() < 2) ? home.ES_SUBSUMED(p) : ES_OK;
}
template<class OptTask, class PL, class Cap>
ExecStatus
purge(Space& home, Propagator& p, TaskArray<OptTask>& t, Cap c) {
int n=t.size();
for (int i=n; i--; )
if (t[i].excluded()) {
t[i].cancel(home,p,PL::pc); t[i]=t[--n];
}
t.size(n);
if (t.size() == 1) {
if (t[0].mandatory())
GECODE_ME_CHECK(c.gq(home, t[0].c()));
else if (c.min() < t[0].c())
return ES_OK;
}
return (t.size() < 2) ? home.ES_SUBSUMED(p) : ES_OK;
}
}}
// STATISTICS: int-prop
Gecode::FloatVal::min
friend FloatVal min(const FloatVal &x, const FloatVal &y)
Definition val.hpp:398
Gecode::Int::TaskArray
Task array.
Definition task.hh:165
Gecode::Int::TaskArray::cancel
void cancel(Space &home, Propagator &p, PropCond pc=Int::PC_INT_BND)
Cancel subscription of propagator p for all tasks.
Definition array.hpp:94
Gecode::Int::TaskArray::size
int size(void) const
Return size of array (number of elements).
Definition array.hpp:63
Gecode::Propagator
Base-class for propagators.
Definition core.hpp:1064
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition core.hpp:3563
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
Gecode::Int
Finite domain integers.
Gecode::Int::purge
ExecStatus purge(Space &home, Propagator &p, TaskArray< OptTask > &t)
Purge optional tasks that are excluded and possibly rewrite propagator.
Definition purge.hpp:38
Gecode
Gecode toplevel namespace
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476