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quickcheck/src/main/java/quickcheck/visitors/MaybeFinder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| /******************************************************************************* | ||
| * | ||
| * Copyright (c) 2023 Nick Battle. | ||
| * | ||
| * Author: Nick Battle | ||
| * | ||
| * This file is part of VDMJ. | ||
| * | ||
| * VDMJ is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * VDMJ is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with VDMJ. If not, see <http://www.gnu.org/licenses/>. | ||
| * SPDX-License-Identifier: GPL-3.0-or-later | ||
| * | ||
| ******************************************************************************/ | ||
| package quickcheck.visitors; | ||
|
|
||
| import java.util.List; | ||
| import java.util.Vector; | ||
|
|
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| import com.fujitsu.vdmj.in.expressions.INExistsExpression; | ||
| import com.fujitsu.vdmj.in.expressions.INExpression; | ||
| import com.fujitsu.vdmj.in.expressions.INForAllExpression; | ||
| import com.fujitsu.vdmj.in.expressions.visitors.INLeafExpressionVisitor; | ||
|
|
||
| /** | ||
| * Search an expression tree after a QuickCheck execution to decide the outcome. | ||
| * This is affected by the forall/exists subexpressions, whether they have | ||
| * type bindings set and whether the binds have all type values. | ||
| */ | ||
| public class MaybeFinder extends INLeafExpressionVisitor<Object, List<Object>, Object> | ||
| { | ||
| private int maybeCount = 0; | ||
|
|
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| public MaybeFinder() | ||
| { | ||
| super(false); | ||
| } | ||
|
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| public boolean hasMaybe() | ||
| { | ||
| return maybeCount > 0; | ||
| } | ||
|
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| @Override | ||
| protected List<Object> newCollection() | ||
| { | ||
| return new Vector<Object>(); | ||
| } | ||
|
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| @Override | ||
| public List<Object> caseExpression(INExpression node, Object arg) | ||
| { | ||
| return newCollection(); | ||
| } | ||
|
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| @Override | ||
| public List<Object> caseForAllExpression(INForAllExpression node, Object arg) | ||
| { | ||
| if (node.maybe) | ||
| { | ||
| maybeCount++; | ||
| node.maybe = false; | ||
| } | ||
|
|
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| return super.caseForAllExpression(node, arg); | ||
| } | ||
|
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| @Override | ||
| public List<Object> caseExistsExpression(INExistsExpression node, Object arg) | ||
| { | ||
| if (node.maybe) | ||
| { | ||
| maybeCount++; | ||
| node.maybe = false; | ||
| } | ||
|
|
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| return super.caseExistsExpression(node, arg); | ||
| } | ||
| } |
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