/// <summary>
/// Invokes the method bound to target, with double dispatch
/// </summary>
public static TResult SurrogateInvoke <T, TResult>(this object target, Func <T, TResult> method, T arg, Func <TResult> orElse, TResult defaultResult)
{
target = target ?? throw new ArgumentNullException(nameof(target));
method = method ?? throw new ArgumentNullException(nameof(method));
if (!ReferenceEquals(target, method.Target) && !target.GetType().IsValueType)
{
throw new InvalidOperationException($"{nameof(method)} must be bound to {nameof(target)}");
}
return(DoubleDispatchObject.CreateSurrogate(method, default(T), orElse, defaultResult).Invoke(arg));
}
/// <summary>
/// Invokes the method bound to target, with double dispatch
/// </summary>
public static void SurrogateInvoke <T>(this object target, Action <T> method, T arg, Action orElse)
{
target = target ?? throw new ArgumentNullException(nameof(target));
method = method ?? throw new ArgumentNullException(nameof(method));
if (!ReferenceEquals(target, method.Target) && !target.GetType().IsValueType)
{
throw new InvalidOperationException($"{nameof(method)} must be bound to {nameof(target)}");
}
DoubleDispatchObject.CreateSurrogate(method, default(T), orElse).Invoke(arg);
}
public static DoubleDispatchObject EnsureThreadSafe(this object target, ref DoubleDispatchObject dispatchObject) => EnsureThreadSafe(target, ref dispatchObject, obj => new DoubleDispatchObject(obj));
