static Tags()
{
Context = new CKTraitContext("ActivityMonitor");
Empty = Context.EmptyTrait;
UserConclusion = Context.FindOrCreate("c:User");
GetTextConclusion = Context.FindOrCreate("c:GetText");
MonitorTopicChanged = Context.FindOrCreate("MonitorTopicChanged");
CreateDependentActivity = Context.FindOrCreate("dep:CreateActivity");
StartDependentActivity = Context.FindOrCreate("dep:StartActivity");
}
/// <summary>
/// Obtains a <see cref="CKTrait"/> that contains the atomic traits from both this trait and <paramref name="other"/>.
/// </summary>
/// <param name="other">Trait that must be kept.</param>
/// <returns>The resulting trait.</returns>
public CKTrait Intersect(CKTrait other)
{
if (ReferenceEquals(other, this))
{
return(this);
}
if (other == null)
{
throw new ArgumentNullException("other");
}
if (other.Context != _context)
{
throw new InvalidOperationException(Impl.CoreResources.TraitsMustBelongToTheSameContext);
}
ListTrait m = new ListTrait();
Process(this, other, null, null, m.TrueAdd);
return(_context.FindOrCreate(m));
}
IEnumerable <CKTrait> ComputeFallbacks()
{
int _currentLength = _tags.Count - 1;
Debug.Assert(_currentLength >= 1, "Empty and atomic tags are handled explicitly (EnumWithEmpty).");
if (_currentLength > 1)
{
int nbTag = _tags.Count;
bool[] kept = new bool[nbTag];
CKTrait[] v = new CKTrait[_currentLength];
do
{
int i = nbTag;
while (--i >= _currentLength)
{
kept[i] = false;
}
int kMax = i;
while (i >= 0)
{
kept[i--] = true;
}
do
{
i = 0;
for (int j = 0; j < nbTag; ++j)
{
if (kept[j])
{
v[i++] = _tags[j];
}
}
Debug.Assert(i == _currentLength, "We kept the right number of tags.");
yield return(_context.FindOrCreate(v, i));
}while(Forward(kept, ref kMax));
}while(--_currentLength > 1);
}
// Special processing for currentLength = 1 (optimization)
foreach (CKTrait m in _tags)
{
yield return(m);
}
yield return(_context.EmptyTrait);
}
/// <summary>
/// Simple shortcut to <see cref="CKTraitContext.FindOrCreate(string)"/>.
/// </summary>
/// <param name="tags">Atomic tag or multiple tags separated by pipes (|).</param>
/// <returns>Registered tags.</returns>
static public CKTrait Register(string tags)
{
return(Context.FindOrCreate(tags));
}
