/// <summary>
/// If source type is insided target type, only grab the type parameters up to the target type. Otherwise, grab consolidated.
/// </summary>
private static TypeNodeList FindNonStandardTypeParametersToBeDuplicated(FindClosurePartsToDuplicate fmd, TypeNode sourceType, TypeNode targetType)
{
Debug.Assert(TypeNode.IsCompleteTemplate(sourceType));
Debug.Assert(TypeNode.IsCompleteTemplate(targetType));
TypeNodeList result = null;
if (sourceType.DeclaringType != null)
{
if (fmd.MembersToDuplicate.Contains(sourceType.DeclaringType))
{
Debug.Assert(false);
return null;
}
if (sourceType.DeclaringType == targetType) return null;
if (IsInsideOf(sourceType, targetType))
{
// difficult case. Grab consolidated type parameters, except the ones up from the target type
var sourceConsolidated = sourceType.ConsolidatedTemplateParameters;
if (sourceConsolidated == null || sourceConsolidated.Count == 0) return null;
var targetConsolidated = targetType.ConsolidatedTemplateParameters;
if (targetConsolidated == null || targetConsolidated.Count == 0) return sourceConsolidated;
if (sourceConsolidated.Count == targetConsolidated.Count) return null; // no extra type parameters
result = new TypeNodeList(sourceConsolidated.Count - targetConsolidated.Count);
for (int i = 0; i < sourceConsolidated.Count; i++)
{
if (i < targetConsolidated.Count) continue;
result.Add(sourceConsolidated[i]);
return result;
}
}
else
{
// For Roslyn-based closures we need to combine all the types from source and target types together.
if (sourceType.IsRoslynBasedStaticClosure())
{
var sourceConsolidated = sourceType.ConsolidatedTemplateParameters;
if (sourceConsolidated == null || sourceConsolidated.Count == 0) return null;
var targetConsolidated = targetType.ConsolidatedTemplateParameters;
if (targetConsolidated == null || targetConsolidated.Count == 0) return sourceConsolidated;
if (sourceConsolidated.Count == targetConsolidated.Count)
return null; // no extra type parameters
result = new TypeNodeList(sourceConsolidated.Count + targetConsolidated.Count);
for (int i = 0; i < targetConsolidated.Count; i++)
{
result.Add(targetConsolidated[i]);
}
for (int i = 0; i < sourceConsolidated.Count; i++)
{
result.Add(sourceConsolidated[i]);
}
return result;
}
result = sourceType.ConsolidatedTemplateParameters;
}
}
return result;
}