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/*******************************************************************************
* Copyright (c) 2012, 2014 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Markus Schorn - initial API and implementation
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp.semantics;
import static org.eclipse.cdt.core.dom.ast.IASTExpression.ValueCategory.PRVALUE;
import org.eclipse.cdt.core.dom.ast.IASTExpression.ValueCategory;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.IValue;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateParameterMap;
import org.eclipse.cdt.internal.core.dom.parser.ITypeMarshalBuffer;
import org.eclipse.cdt.internal.core.dom.parser.cpp.ICPPEvaluation;
import org.eclipse.cdt.internal.core.dom.parser.cpp.InstantiationContext;
import org.eclipse.core.runtime.CoreException;
/**
* Performs evaluation of a compound statement expression. Most but not all methods
* delegate to the evaluation of the last expression in the compound one.
*/
public class EvalCompoundStatementExpression extends CPPDependentEvaluation {
// fDelegate is the expression inside the expression-statement which is the
// last statement inside the statement-expression.
// TODO: Store the executions of the statements that come before the last one,
// and simulate their execution in computeForFunctionCall().
private final ICPPEvaluation fDelegate;
public EvalCompoundStatementExpression(ICPPEvaluation delegate, IASTNode pointOfDefinition) {
this(delegate, findEnclosingTemplate(pointOfDefinition));
}
public EvalCompoundStatementExpression(ICPPEvaluation delegate, IBinding templateDefinition) {
super(templateDefinition);
fDelegate= delegate;
}
public ICPPEvaluation getLastEvaluation() {
return fDelegate;
}
@Override
public boolean isInitializerList() {
return false;
}
@Override
public boolean isFunctionSet() {
return false;
}
@Override
public boolean isTypeDependent() {
return fDelegate.isTypeDependent();
}
@Override
public boolean isValueDependent() {
return fDelegate.isValueDependent();
}
@Override
public boolean isConstantExpression() {
return fDelegate.isConstantExpression();
}
@Override
public boolean isEquivalentTo(ICPPEvaluation other) {
if (!(other instanceof EvalCompoundStatementExpression)) {
return false;
}
EvalCompoundStatementExpression o = (EvalCompoundStatementExpression) other;
return fDelegate.isEquivalentTo(o.fDelegate);
}
@Override
public IType getType() {
return fDelegate.getType();
}
@Override
public IValue getValue() {
return fDelegate.getValue();
}
@Override
public ValueCategory getValueCategory() {
return PRVALUE;
}
@Override
public void marshal(ITypeMarshalBuffer buffer, boolean includeValue) throws CoreException {
buffer.putShort(ITypeMarshalBuffer.EVAL_COMPOUND);
buffer.marshalEvaluation(fDelegate, includeValue);
marshalTemplateDefinition(buffer);
}
public static ICPPEvaluation unmarshal(short firstBytes, ITypeMarshalBuffer buffer) throws CoreException {
ICPPEvaluation arg= buffer.unmarshalEvaluation();
IBinding templateDefinition= buffer.unmarshalBinding();
return new EvalCompoundStatementExpression(arg, templateDefinition);
}
@Override
public ICPPEvaluation instantiate(InstantiationContext context, int maxDepth) {
ICPPEvaluation delegate = fDelegate.instantiate(context, maxDepth);
if (delegate == fDelegate)
return this;
return new EvalCompoundStatementExpression(delegate, getTemplateDefinition());
}
@Override
public ICPPEvaluation computeForFunctionCall(ActivationRecord record, ConstexprEvaluationContext context) {
ICPPEvaluation delegate = fDelegate.computeForFunctionCall(record, context.recordStep());
if (delegate == fDelegate) {
return this;
} else {
EvalCompoundStatementExpression evalCompound = new EvalCompoundStatementExpression(delegate, getTemplateDefinition());
return evalCompound;
}
}
@Override
public int determinePackSize(ICPPTemplateParameterMap tpMap) {
return fDelegate.determinePackSize(tpMap);
}
@Override
public boolean referencesTemplateParameter() {
return fDelegate.referencesTemplateParameter();
}
}
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