private static ReadOnlyCollection <Type> GetConcreteTypesCore(Type genericType, LinkList <Binding> bindings)
{
Debug.Assert(genericType != null);
Debug.Assert(bindings != null);
bool cached = concreteTypeCache_.ContainsKey(genericType);
bool unbound = genericType.GetGenericArguments( )
.All((a) => !Binding.ContainsArgument(bindings, a));
// If the type has already been evaluated and there are no interfering bindings, return cached value.
if (cached && unbound)
{
return(concreteTypeCache_[genericType]);
}
// Otherwise, get a concrete type for each set of bindings.
LinkList <Type> openArguments;
BindingCollection concreteTypeBindngs = GenericTypeResolver.GetConcreteTypeBindings(genericType, bindings, out openArguments);
var concreteTypes = concreteTypeBindngs
.Transform((argumentBindings) => MakeConcreteType(genericType, openArguments, argumentBindings))
.ToReadOnlyCollection( );
// If there are no interfering bindings, cache the concrete types.
if (!cached && unbound)
{
concreteTypeCache_.TryAdd(genericType, concreteTypes);
concreteTypes = concreteTypeCache_[genericType];
}
return(concreteTypes);
}