/// <summary>
/// Extends the specified source Predicate with another Predicate and the specified PredicateOperator.
/// </summary>
/// <typeparam name="T">The type</typeparam>
/// <param name="first">The source Predicate.</param>
/// <param name="second">The second Predicate.</param>
/// <param name="operator">The Operator (can be "And" or "Or").</param>
/// <returns>Expression{Func{T, bool}}</returns>
public static Expression <Func <T, bool> > Extend <T>([NotNull] this ExpressionStarter <T> first, [NotNull] Expression <Func <T, bool> > second, PredicateOperator @operator = PredicateOperator.Or)
{
return(@operator == PredicateOperator.Or ? first.Or(second) : first.And(second));
}
/// <summary> LinqKit: Expands expression </summary>
public static Expression Expand <TDelegate>(this ExpressionStarter <TDelegate> expr)
{
return((expr != null && (expr.IsStarted || expr.UseDefaultExpression)) ? new ExpressionExpander().Visit(expr) : null);
}