| /******************************************************************************* |
| * Copyright (c) 2005, 2011 IBM Corporation 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: |
| * John Camelon (IBM Rational Software) - Initial API and implementation |
| * Yuan Zhang / Beth Tibbitts (IBM Research) |
| * Bryan Wilkinson (QNX) |
| * Markus Schorn (Wind River Systems) |
| *******************************************************************************/ |
| package org.eclipse.cdt.internal.core.dom.parser.c; |
| |
| import org.eclipse.cdt.core.dom.ast.ASTVisitor; |
| import org.eclipse.cdt.core.dom.ast.IASTCompletionContext; |
| import org.eclipse.cdt.core.dom.ast.IASTExpression; |
| import org.eclipse.cdt.core.dom.ast.IASTFieldReference; |
| import org.eclipse.cdt.core.dom.ast.IASTName; |
| import org.eclipse.cdt.core.dom.ast.IASTNode; |
| import org.eclipse.cdt.core.dom.ast.IBinding; |
| import org.eclipse.cdt.core.dom.ast.ISemanticProblem; |
| import org.eclipse.cdt.core.dom.ast.IType; |
| import org.eclipse.cdt.core.dom.ast.IVariable; |
| import org.eclipse.cdt.internal.core.dom.parser.ASTNode; |
| import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent; |
| import org.eclipse.cdt.internal.core.dom.parser.ProblemType; |
| |
| /** |
| * Field reference in C. |
| */ |
| public class CASTFieldReference extends ASTNode |
| implements IASTFieldReference, IASTAmbiguityParent, IASTCompletionContext { |
| private IASTExpression owner; |
| private IASTName name; |
| private boolean ptr; |
| |
| public CASTFieldReference() { |
| } |
| |
| public CASTFieldReference(IASTName name, IASTExpression owner) { |
| this(name, owner, false); |
| } |
| |
| public CASTFieldReference(IASTName name, IASTExpression owner, boolean ptr) { |
| setFieldOwner(owner); |
| setFieldName(name); |
| this.ptr = ptr; |
| } |
| |
| @Override |
| public CASTFieldReference copy() { |
| return copy(CopyStyle.withoutLocations); |
| } |
| |
| @Override |
| public CASTFieldReference copy(CopyStyle style) { |
| CASTFieldReference copy = new CASTFieldReference(); |
| copy.setFieldOwner(owner == null ? null : owner.copy(style)); |
| copy.setFieldName(name == null ? null : name.copy(style)); |
| copy.ptr = ptr; |
| copy.setOffsetAndLength(this); |
| if (style == CopyStyle.withLocations) { |
| copy.setCopyLocation(this); |
| } |
| return copy; |
| } |
| |
| @Override |
| public IASTExpression getFieldOwner() { |
| return owner; |
| } |
| |
| @Override |
| public void setFieldOwner(IASTExpression expression) { |
| assertNotFrozen(); |
| this.owner = expression; |
| if (expression != null) { |
| expression.setParent(this); |
| expression.setPropertyInParent(FIELD_OWNER); |
| } |
| } |
| |
| @Override |
| public IASTName getFieldName() { |
| return name; |
| } |
| |
| @Override |
| public void setFieldName(IASTName name) { |
| assertNotFrozen(); |
| this.name = name; |
| if (name != null) { |
| name.setParent(this); |
| name.setPropertyInParent(FIELD_NAME); |
| } |
| } |
| |
| @Override |
| public boolean isPointerDereference() { |
| return ptr; |
| } |
| |
| @Override |
| public void setIsPointerDereference(boolean value) { |
| assertNotFrozen(); |
| ptr = value; |
| } |
| |
| @Override |
| public boolean accept(ASTVisitor action) { |
| if (action.shouldVisitExpressions) { |
| switch (action.visit(this)) { |
| case ASTVisitor.PROCESS_ABORT: return false; |
| case ASTVisitor.PROCESS_SKIP: return true; |
| default: break; |
| } |
| } |
| |
| if (owner != null && !owner.accept(action)) return false; |
| if (name != null && !name.accept(action)) return false; |
| |
| if (action.shouldVisitExpressions) { |
| switch (action.leave(this)) { |
| case ASTVisitor.PROCESS_ABORT: return false; |
| case ASTVisitor.PROCESS_SKIP: return true; |
| default: break; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public int getRoleForName(IASTName n) { |
| if (n == this.name) |
| return r_reference; |
| return r_unclear; |
| } |
| |
| @Override |
| public void replace(IASTNode child, IASTNode other) { |
| if (child == owner) { |
| other.setPropertyInParent(child.getPropertyInParent()); |
| other.setParent(child.getParent()); |
| owner = (IASTExpression) other; |
| } |
| } |
| |
| @Override |
| public IType getExpressionType() { |
| IBinding binding = getFieldName().resolveBinding(); |
| if (binding instanceof IVariable) { |
| return ((IVariable)binding).getType(); |
| } |
| return new ProblemType(ISemanticProblem.TYPE_UNKNOWN_FOR_EXPRESSION); |
| } |
| |
| @Override |
| public boolean isLValue() { |
| if (isPointerDereference()) |
| return true; |
| |
| return getFieldOwner().isLValue(); |
| } |
| |
| @Override |
| public final ValueCategory getValueCategory() { |
| return isLValue() ? ValueCategory.LVALUE : ValueCategory.PRVALUE; |
| } |
| |
| @Override |
| public IBinding[] findBindings(IASTName n, boolean isPrefix) { |
| return CVisitor.findBindingsForContentAssist(n, isPrefix); |
| } |
| } |