private type_node InstantiateParameter(SemanticTree.ITypeNode genericType, type_node[] instances)
{
if (genericType.is_generic_parameter)
{
return(instances[(genericType as type_node).generic_param_index]);
}
else
{
var genericNode = (genericType as generic_instance_type_node);
if (genericNode != null)
{
var parameters = genericNode.instance_params.Select(x => InstantiateParameter(x, instances)).ToList();
genericNode.instance_params = parameters;
}
return(genericNode as type_node);
}
}
private IEnumerable <int> GenericParameterIndices(SemanticTree.ITypeNode node)
{
if (node.is_generic_parameter)
{
yield return((node as type_node).generic_param_index);
}
if (node is generic_instance_type_node genericNode)
{
foreach (var index in genericNode.instance_params.Aggregate(
Enumerable.Empty <int>(),
(indices, nextNode) => indices.Concat(GenericParameterIndices(nextNode)))
.Distinct())
{
yield return(index);
}
}
yield break;
}