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/*******************************************************************************
* Copyright (c) 2010 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
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp.semantics;
import static org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil.CVTYPE;
import static org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil.REF;
import static org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil.TDEF;
import org.eclipse.cdt.core.dom.ast.DOMException;
import org.eclipse.cdt.core.dom.ast.IASTExpression.ValueCategory;
import org.eclipse.cdt.core.dom.ast.IFunctionType;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunction;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunctionType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPReferenceType;
/**
* Methods for computing the type of an expression
*/
public class ExpressionTypes {
public static IType glvalueType(IType type) {
// Reference types are removed.
return SemanticUtil.getNestedType(type, TDEF | REF);
}
public static IType prvalueType(IType type) {
return Conversions.lvalue_to_rvalue(type);
}
public static ValueCategory valueCategoryFromFunctionCall(ICPPFunction function) {
try {
final ICPPFunctionType ft = function.getType();
return valueCategoryFromReturnType(ft.getReturnType());
} catch (DOMException e) {
return ValueCategory.PRVALUE;
}
}
public static ValueCategory valueCategoryFromReturnType(IType r) {
r= SemanticUtil.getNestedType(r, TDEF);
if (r instanceof ICPPReferenceType) {
ICPPReferenceType refType= (ICPPReferenceType) r;
if (!refType.isRValueReference()) {
return ValueCategory.LVALUE;
}
if (SemanticUtil.getNestedType(refType.getType(), TDEF | REF | CVTYPE) instanceof IFunctionType) {
return ValueCategory.LVALUE;
}
return ValueCategory.XVALUE;
}
return ValueCategory.PRVALUE;
}
public static IType typeFromFunctionCall(ICPPFunction function) {
try {
final ICPPFunctionType ft = function.getType();
return typeFromReturnType(ft.getReturnType());
} catch (DOMException e) {
return e.getProblem();
}
}
public static IType typeFromReturnType(IType r) {
r= SemanticUtil.getNestedType(r, TDEF);
if (r instanceof ICPPReferenceType) {
return glvalueType(r);
}
return prvalueType(r);
}
}
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