/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryNullExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public override string Visit(QueryNullExpression expression)
{
return this.literalConverter.SerializePrimitive(null);
}
/// <summary>
/// Replaces the given expression.
/// </summary>
/// <param name="expression">Expression to replace.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(QueryNullExpression expression)
{
return(expression);
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryNullExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public virtual string Visit(QueryNullExpression expression)
{
throw new TaupoNotSupportedException("Not supported");
}
/// <summary>
/// Generates System.CodeDom.CodeExpression from the given expression.
/// </summary>
/// <param name="expression">Expression from which System.CodeDom.CodeExpression is generated.</param>
/// <returns>Generated System.CodeDom.CodeExpression.</returns>
public virtual CodeExpression Visit(QueryNullExpression expression)
{
return(Code.Null());
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryNullExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public override string Visit(QueryNullExpression expression)
{
return(this.literalConverter.SerializePrimitive(null));
}
/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public QueryValue Visit(QueryNullExpression expression)
{
return(expression.ExpressionType.NullValue);
}