Get [Source] from Has<T> and Not<T> as well

src/gaemstone.SourceGen/Structure/ParameterInfo.cs

@@ -43,17 +43,14 @@ public class ParameterInfo : BaseInfo
 	public ParameterInfo(ISymbol symbol)
 		: base(symbol)
 	{
-		Source = Get("Source")?.AttributeClass!.TypeArguments[0]
-			// If the type of the parameter has the [Singleton] attribute, use it as the default Source.
-			?? (Symbol.Type.HasAttribute("gaemstone.ECS.SingletonAttribute") ? Symbol.Type : null);
-
 		var typeFullName = Symbol.Type.GetFullName(FullNameStyle.Metadata);
 		if (UniqueParameters.TryGetValue(typeFullName, out var replacement))
 		{
-			IsOr = false;
-			Kind = ParameterKind.Unique;
-			TermTypes = Array.Empty<ITypeSymbol>();
+			Source = null;
 			UniqueReplacement = replacement;
+			TermTypes = Array.Empty<ITypeSymbol>();
+			Kind = ParameterKind.Unique;
+			IsOr = false;
 		}
 		else
 		{
@@ -75,7 +72,7 @@ public class ParameterInfo : BaseInfo
 					FieldType = null;
 					IsOr = true;
 				}
-				else if ((isHas || isNot) && (args is [ INamedTypeSymbol relation, INamedTypeSymbol target ]))
+				else if ((isHas || isNot) && (args is [ ITypeSymbol relation, ITypeSymbol target ]))
 				{
 					TermTypes = ImmutableList.Create(new Pair(relation, target));
 					FieldType = null;
@@ -83,7 +80,7 @@ public class ParameterInfo : BaseInfo
 				else
 				{
 					TermTypes = args.ToImmutableList();
-					FieldType = IsNullable ? args[0] : type;
+					FieldType = (IsNullable || isHas || isNot) ? args[0] : type;
 				}
 			}
 			else
@@ -92,6 +89,10 @@ public class ParameterInfo : BaseInfo
 				FieldType = Symbol.Type;
 			}
 
+			Source = Get("Source")?.AttributeClass!.TypeArguments[0]
+				// If the type of the parameter has the [Singleton] attribute, use it as the default Source.
+				?? ((FieldType?.HasAttribute("gaemstone.ECS.SingletonAttribute") == true) ? FieldType : null);
+
 			Kind = isHas          ? ParameterKind.Has
 				:  isNot          ? ParameterKind.Not
 				:  IsNullable     ? ParameterKind.Nullable