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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Tim King, Morgan Deters |
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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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* Typing and cardinality rules for the theory of UF. |
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*/ |
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#include "theory/uf/theory_uf_type_rules.h" |
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#include <climits> |
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#include <sstream> |
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#include "util/rational.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace uf { |
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TypeNode UfTypeRule::computeType(NodeManager* nodeManager, TNode n, bool check) |
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{ |
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TNode f = n.getOperator(); |
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TypeNode fType = f.getType(check); |
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if (!fType.isFunction()) |
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{ |
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throw TypeCheckingExceptionPrivate(n, |
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"operator does not have function type"); |
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} |
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if (check) |
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{ |
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if (n.getNumChildren() != fType.getNumChildren() - 1) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "number of arguments does not match the function type"); |
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} |
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TNode::iterator argument_it = n.begin(); |
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TNode::iterator argument_it_end = n.end(); |
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TypeNode::iterator argument_type_it = fType.begin(); |
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for (; argument_it != argument_it_end; ++argument_it, ++argument_type_it) |
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{ |
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TypeNode currentArgument = (*argument_it).getType(); |
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TypeNode currentArgumentType = *argument_type_it; |
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if (!currentArgument.isSubtypeOf(currentArgumentType)) |
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{ |
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std::stringstream ss; |
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ss << "argument type is not a subtype of the function's argument " |
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<< "type:\n" |
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<< "argument: " << *argument_it << "\n" |
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<< "has type: " << (*argument_it).getType() << "\n" |
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<< "not subtype: " << *argument_type_it << "\n" |
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<< "in term : " << n; |
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throw TypeCheckingExceptionPrivate(n, ss.str()); |
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} |
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} |
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} |
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return fType.getRangeType(); |
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} |
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TypeNode CardinalityConstraintTypeRule::computeType(NodeManager* nodeManager, |
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TNode n, |
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bool check) |
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{ |
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if (check) |
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{ |
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// don't care what it is, but it should be well-typed |
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n[0].getType(check); |
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TypeNode valType = n[1].getType(check); |
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if (valType != nodeManager->integerType()) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "cardinality constraint must be integer"); |
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} |
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if (n[1].getKind() != kind::CONST_RATIONAL) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "cardinality constraint must be a constant"); |
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} |
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cvc5::Rational r(INT_MAX); |
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if (n[1].getConst<Rational>() > r) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "Exceeded INT_MAX in cardinality constraint"); |
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} |
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if (n[1].getConst<Rational>().getNumerator().sgn() != 1) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "cardinality constraint must be positive"); |
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} |
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} |
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return nodeManager->booleanType(); |
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} |
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TypeNode CombinedCardinalityConstraintTypeRule::computeType( |
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NodeManager* nodeManager, TNode n, bool check) |
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{ |
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if (check) |
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{ |
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TypeNode valType = n[0].getType(check); |
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if (valType != nodeManager->integerType()) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "combined cardinality constraint must be integer"); |
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} |
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if (n[0].getKind() != kind::CONST_RATIONAL) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "combined cardinality constraint must be a constant"); |
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} |
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cvc5::Rational r(INT_MAX); |
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if (n[0].getConst<Rational>() > r) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "Exceeded INT_MAX in combined cardinality constraint"); |
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} |
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if (n[0].getConst<Rational>().getNumerator().sgn() == -1) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "combined cardinality constraint must be non-negative"); |
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} |
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} |
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return nodeManager->booleanType(); |
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} |
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TypeNode PartialTypeRule::computeType(NodeManager* nodeManager, |
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TNode n, |
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bool check) |
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{ |
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return n.getOperator().getType().getRangeType(); |
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} |
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TypeNode CardinalityValueTypeRule::computeType(NodeManager* nodeManager, |
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TNode n, |
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bool check) |
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{ |
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if (check) |
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{ |
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n[0].getType(check); |
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} |
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return nodeManager->integerType(); |
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} |
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TypeNode HoApplyTypeRule::computeType(NodeManager* nodeManager, |
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TNode n, |
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bool check) |
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{ |
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Assert(n.getKind() == kind::HO_APPLY); |
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TypeNode fType = n[0].getType(check); |
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if (!fType.isFunction()) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "first argument does not have function type"); |
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} |
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Assert(fType.getNumChildren() >= 2); |
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if (check) |
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{ |
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TypeNode aType = n[1].getType(check); |
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if (!aType.isSubtypeOf(fType[0])) |
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{ |
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throw TypeCheckingExceptionPrivate( |
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n, "argument does not match function type"); |
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} |
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} |
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if (fType.getNumChildren() == 2) |
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{ |
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return fType.getRangeType(); |
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} |
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else |
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{ |
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std::vector<TypeNode> children; |
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TypeNode::iterator argument_type_it = fType.begin(); |
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TypeNode::iterator argument_type_it_end = fType.end(); |
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++argument_type_it; |
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for (; argument_type_it != argument_type_it_end; ++argument_type_it) |
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{ |
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children.push_back(*argument_type_it); |
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} |
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return nodeManager->mkFunctionType(children); |
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} |
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} |
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} // namespace uf |
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} // namespace theory |
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} // namespace cvc5 |