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