public IConstraintManager GetSubSet(ISet <Constraint> subset)
{
// Don't make a new ConstraintManager if the constraints are the same.
if (InternalConstraints.SetEquals(subset))
{
return(this);
}
if (subset.Count >= InternalConstraints.Count)
{
throw new ArgumentException("Subset has count >= to count of this constraint manager's constraints");
}
// Is this the most efficient way to do this?
ConstraintManager other = (ConstraintManager)this.MemberwiseClone();
Debug.Assert(subset.IsSubsetOf(InternalConstraints), "argument ``subset`` is not a valid subset");
var asIm = ImmutableHashSet <Constraint> .Empty.Union(subset);
other.InternalConstraints = asIm.ToBuilder();
// Fully recompute the hashcode on the new constraint manager
other.FullyRecomputeHashCode();
return(other);
}
public IConstraintManager Clone()
{
ConstraintManager other = (ConstraintManager)this.MemberwiseClone();
var asImmutable = this.InternalConstraints.ToImmutable();
other.InternalConstraints = asImmutable.ToBuilder();
return(other);
}