/// <summary>
/// Fork a stamp into 4 distinct stamps (as out parameters)
/// </summary>
/// <param name="source">The source stamp.</param>
/// <param name="s1">1st stamp with a unique identity and a copy of the causal history.</param>
/// <param name="s2">2nd stamp with a unique identity and a copy of the causal history.</param>
/// <param name="s3">3rd stamp with a unique identity and a copy of the causal history.</param>
/// <param name="s4">4th stamp with a unique identity and a copy of the causal history.</param>
/// <remarks>
/// A convenience method when out parameters are preferred over a return 4-tuple.
/// </remarks>
public static void Fork(this Stamp source, out Stamp s1, out Stamp s2, out Stamp s3, out Stamp s4)
{
var forked = source.Fork4();
s1 = forked.Item1;
s2 = forked.Item2;
s3 = forked.Item3;
s4 = forked.Item4;
}
/// <inheritdoc/>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
string text = value as string;
if (text != null)
{
return(Stamp.Parse(text));
}
return(base.ConvertFrom(context, culture, value));
}
/// <summary>
/// Fork a stamp into 3 distinct stamps (returns a 3-tuple)
/// </summary>
/// <param name="source">The source stamp.</param>
/// <returns>A 3-tuple, each with a unique identity and a copy of the causal history.</returns>
/// <remarks>
/// A convenience method for forking 1 stamp into 3 unique stamps.
/// </remarks>
public static (Stamp, Stamp, Stamp) Fork3(this Stamp source)
{
(Stamp, Stamp)fork = source.Fork();
Stamp a = fork.Item1;
Stamp c = fork.Item2;
(Stamp, Stamp)fork1 = a.Fork();
a = fork1.Item1;
Stamp b = fork1.Item2;
return(a, b, c);
}
/// <summary>
/// Indicates whether the source stamp is equivalent (causally equal) with the other stamp.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="other">The other, for comparison.</param>
/// <returns><c>true</c> if a.leq(b) Λ b.leq(a); otherwise <c>false</c>.</returns>
public static bool Equivalent(this Stamp source, Stamp other)
{
return(source.Leq(other) && other.Leq(source));
}
/// <summary>
/// Indicates whether the source stamp is concurrent with the other stamp.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="other">The other, for comparison.</param>
/// <returns><c>true</c> if ¬(a.leq(b)) and ¬(b.leq(a)); otherwise, <c>false</c>.</returns>
public static bool Concurrent(this Stamp source, Stamp other)
{
return(!source.Leq(other) && !other.Leq(source));
}
public static (Stamp, Stamp) Sync(this Stamp source, Stamp other)
{
return(source.Join(other).Fork());
}
public static Stamp Receive(this Stamp source, Stamp other)
{
return(source.Join(other).Event());
}