root / trunk / compiler / ooasCompiler / src / org / momut / ooas / visitors / analysis / OoaCheckASTVisitor.java @ 7
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/**
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*
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* OOAS Compiler
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*
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* Copyright 2015, AIT Austrian Institute of Technology.
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* This code is based on the C# Version of the OOAS Compiler, which is
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* copyright 2015 by the Institute of Software Technology, Graz University
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* of Technology with portions copyright by the AIT Austrian Institute of
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* Technology. All rights reserved.
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*
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* SEE THE "LICENSE" FILE FOR THE TERMS UNDER WHICH THIS FILE IS PROVIDED.
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*
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* If you modify the file please update the list of contributors below to in-
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* clude your name. Please also stick to the coding convention of using TABs
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* to do the basic (block-level) indentation and spaces for anything after
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* that. (Enable the display of special chars and it should be pretty obvious
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* what this means.) Also, remove all trailing whitespace.
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*
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* Contributors:
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* Willibald Krenn (AIT)
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* Stephan Zimmerer (AIT)
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* Markus Demetz (AIT)
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* Christoph Czurda (AIT)
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*
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*/
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package org.momut.ooas.visitors.analysis; |
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import java.util.HashMap; |
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import org.momut.ooas.ast.IAst; |
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import org.momut.ooas.ast.IScope; |
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import org.momut.ooas.ast.statements.Block; |
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import org.momut.ooas.ast.statements.NondetBlock; |
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import org.momut.ooas.ast.statements.PrioBlock; |
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import org.momut.ooas.ast.statements.SeqBlock; |
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import org.momut.ooas.ast.statements.Statement; |
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import org.momut.ooas.ast.types.OpaqueType; |
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import org.momut.ooas.ast.types.UlyssesType; |
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import org.momut.ooas.parser.ParserState; |
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import org.momut.ooas.utils.exceptions.InternalCompilerException; |
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import org.momut.ooas.visitors.OoaCompleteAstTraversalVisitor; |
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public final class OoaCheckASTVisitor extends OoaCompleteAstTraversalVisitor { |
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private final String m_tag; |
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private final HashMap<String,UlyssesType> m_seenTypes = new HashMap<>(); |
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@Override
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protected void VisitAstElement(IAst element, IAst parent) { |
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if (element instanceof UlyssesType) { |
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final UlyssesType t = (element instanceof OpaqueType) ? ((OpaqueType) element).resolvedType() : (UlyssesType) element; |
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if (t != null) { // opaque might not have resolve yet.. |
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final String typeStr = t.toString(); |
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if (m_seenTypes.containsKey(typeStr)) {
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if (!t.isAnonymousType() &&
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m_seenTypes.get(typeStr) != t) // ref eq
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{ |
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throw new InternalCompilerException(String.format("Internal Error (%s): AST structure error." |
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+ " Type instantiated multiple times: %s", m_tag, typeStr));
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} |
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} else
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m_seenTypes.put(typeStr, t); |
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} |
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} |
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super.VisitAstElement(element, parent);
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} |
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@Override
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public void visit(NondetBlock nondetBlock) { |
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super.visit(nondetBlock);
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checkScope(nondetBlock); |
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} |
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@Override
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public void visit(PrioBlock prioBlock) { |
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super.visit(prioBlock);
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checkScope(prioBlock); |
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} |
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@Override
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public void visit(SeqBlock seqBlock) { |
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super.visit(seqBlock);
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checkScope(seqBlock); |
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} |
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private final void checkScope(Block aBlock) { |
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for (final Statement element: aBlock.statements()) |
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if (element instanceof IScope) { |
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final IScope child = (IScope) element;
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if (child.GetParentScope() != aBlock)
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throw new InternalCompilerException("Internal Error (%s): AST structure error. ", m_tag); |
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} |
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} |
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public OoaCheckASTVisitor(ParserState aState, String tag) { |
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super(aState);
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m_tag = tag; |
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} |
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} |