public override bool Subsets(Match match)
{
if (match is MatchBaseType)
{
return(base.Subsets(match));
}
// BaseType can subset Class match based on learnt strings, while respecting narrowing.
if (match is MatchClass)
{
MatchClass clazz = match as MatchClass;
// If Class match is narrowed by BaseType, perform BaseType vs. BaseType narrowing the Class subset test.
if (clazz.NarrowedBy != null && !base.Subsets(clazz.NarrowedBy))
{
return(false);
}
// BaseType match subsets Class match, if all its strings are defined in BaseTypesOfClass for Class match.
if (clazz.Contains(this))
{
return(true);
}
}
return(false);
}
protected MatchClass(MatchClass copy) : base(copy)
{
NarrowedBy = copy.NarrowedBy;
}