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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds, Aina Niemetz
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
* in the top-level source directory and their institutional affiliations.
* All rights reserved. See the file COPYING in the top-level source
* directory for licensing information.
* ****************************************************************************
*
* Implementation of a cache of skolems for theory of sets.
*/
#include "theory/sets/skolem_cache.h"
#include "expr/skolem_manager.h"
#include "theory/rewriter.h"
using namespace cvc5::kind;
namespace cvc5 {
namespace theory {
namespace sets {
SkolemCache::SkolemCache() {}
Node SkolemCache::mkTypedSkolemCached(
TypeNode tn, Node a, Node b, SkolemId id, const char* c)
{
a = a.isNull() ? a : Rewriter::rewrite(a);
b = b.isNull() ? b : Rewriter::rewrite(b);
std::map<SkolemId, Node>::iterator it = d_skolemCache[a][b].find(id);
if (it == d_skolemCache[a][b].end())
{
SkolemManager* sm = NodeManager::currentNM()->getSkolemManager();
Node sk;
if (id == SkolemId::SK_PURIFY)
{
Assert(a.getType() == tn);
sk = sm->mkPurifySkolem(a, c);
}
else
{
sk = sm->mkDummySkolem(c, tn, "sets skolem");
}
d_skolemCache[a][b][id] = sk;
d_allSkolems.insert(sk);
return sk;
}
return it->second;
}
Node SkolemCache::mkTypedSkolemCached(TypeNode tn,
Node a,
SkolemId id,
const char* c)
{
return mkTypedSkolemCached(tn, a, Node::null(), id, c);
}
Node SkolemCache::mkTypedSkolem(TypeNode tn, const char* c)
{
SkolemManager* sm = NodeManager::currentNM()->getSkolemManager();
Node n = sm->mkDummySkolem(c, tn, "sets skolem");
d_allSkolems.insert(n);
return n;
}
bool SkolemCache::isSkolem(Node n) const
{
return d_allSkolems.find(n) != d_allSkolems.end();
}
} // namespace sets
} // namespace theory
} // namespace cvc5
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