CommonTypeofNode.java

package edu.udel.cis.vsl.abc.ast.node.common.type;

import java.io.PrintStream;

import edu.udel.cis.vsl.abc.ast.IF.ASTException;
import edu.udel.cis.vsl.abc.ast.node.IF.ASTNode;
import edu.udel.cis.vsl.abc.ast.node.IF.expression.ExpressionNode;
import edu.udel.cis.vsl.abc.ast.node.IF.type.TypeNode;
import edu.udel.cis.vsl.abc.ast.node.IF.type.TypeofNode;
import edu.udel.cis.vsl.abc.token.IF.Source;

public class CommonTypeofNode extends CommonTypeNode implements TypeofNode {

	public CommonTypeofNode(Source source, ExpressionNode expression) {
		super(source, TypeNodeKind.TYPEOF, expression);
	}

	public CommonTypeofNode(Source source, TypeNode type) {
		super(source, TypeNodeKind.TYPEOF, type);
	}

	@Override
	public TypeofNode copy() {
		if (this.hasExpressionOperand())
			return new CommonTypeofNode(this.getSource(),
					duplicate(getExpressionOperand()));
		return new CommonTypeofNode(this.getSource(),
				duplicate(getTypeOperand()));
	}

	@Override
	protected void printBody(PrintStream out) {
		out.print("TypeofNode");
	}

	@Override
	public boolean hasExpressionOperand() {
		return (this.child(0) instanceof ExpressionNode);
	}

	@Override
	public ExpressionNode getExpressionOperand() {
		assert (this.child(0) instanceof ExpressionNode);
		return (ExpressionNode) this.child(0);
	}

	@Override
	public TypeNode getTypeOperand() {
		assert (this.child(0) instanceof TypeNode);
		return (TypeNode) this.child(0);
	}

	@Override
	public ASTNode setChild(int index, ASTNode child) {
		if (index != 0)
			throw new ASTException(
					"CommonTypeofNode has one child, but saw index " + index);
		if (index == 0 && !(child == null || child instanceof ExpressionNode))
			throw new ASTException("Child of CommonTypeofNode at index " + index
					+ " must be a ExpressionNode, but saw " + child
					+ " with type " + child.nodeKind());
		return super.setChild(index, child);
	}
}