/*******************************************************************************
 * Copyright (c) 2011 Bruno Medeiros and other Contributors.
 * 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:
 *     Bruno Medeiros - initial API and implementation
 *******************************************************************************/
package dtool.ast.references;

import static melnorme.utilbox.core.CoreUtil.assertCast;
import melnorme.lang.tooling.ast.CommonASTNode;
import melnorme.lang.tooling.ast.IASTVisitor;
import melnorme.lang.tooling.ast.ILanguageElement;
import melnorme.lang.tooling.ast.util.ASTCodePrinter;
import melnorme.lang.tooling.ast_actual.ASTNodeTypes;
import melnorme.lang.tooling.engine.PickedElement;
import melnorme.lang.tooling.engine.resolver.ReferenceSemantics;
import melnorme.lang.tooling.symbols.INamedElement;
import dtool.ast.expressions.IInitializer;
import dtool.engine.analysis.IVarDefinitionLike;

/**
 * This reference node can only be parsed in special circumstances
 */
public final class AutoReference extends Reference {
	
	public AutoReference() {
	}
	
	@Override
	public ASTNodeTypes getNodeType() {
		return ASTNodeTypes.REF_AUTO;
	}
	
	@Override
	protected ILanguageElement getParent_Concrete() {
		assertCast(getLexicalParent(), IVarDefinitionLike.class);
		return super.getParent_Concrete();
	}
	
	public IVarDefinitionLike getParent_() {
		return assertCast(getLexicalParent(), IVarDefinitionLike.class);
	}
	
	@Override
	public void visitChildren(IASTVisitor visitor) {
	}
	
	@Override
	protected CommonASTNode doCloneTree() {
		return new AutoReference();
	}
	
	@Override
	public void toStringAsCode(ASTCodePrinter cp) {
		cp.append("auto");
	}
	
	/* -----------------  ----------------- */
	
	@Override
	protected ReferenceSemantics doCreateSemantics(PickedElement<?> pickedElement) {
		return new ReferenceSemantics(this, pickedElement) {
		
			@Override
			public INamedElement doResolveTargetElement() {
				IInitializer initializer = getParent_().getDeclaredInitializer();
				if(initializer != null) {
					return initializer.getTypeOfInitializer(context);
				}
				return null;
			}
			
		};
	}
	
}