/// <summary>
/// Validate an 'instance of' expression.
/// </summary>
/// <param name="ioexp">
/// is the expression. </param>
/// <returns> null. </returns>
public virtual object visit(InstOfExpr ioexp)
{
printBinExpr("INSTANCEOF", ioexp);
return(null);
}
/// <param name="ioexp">
/// is the instance of expression. </param>
/// <returns> a ioexp. </returns>
public virtual object visit(InstOfExpr ex)
{
ex.left().accept(this);
ex.right().accept(this);
return(null);
}
