public AttributeReturnType(ClassFinder context, string name)
		{
			if (context == null)
				throw new ArgumentNullException("context");
			if (name == null)
				throw new ArgumentNullException("name");
			this.name = name;
			scrt1 = new SearchClassReturnType(context.ProjectContent, context.CallingClass,
			                                  context.CaretLine, context.CaretColumn, name, 0);
			scrt2 = new SearchClassReturnType(context.ProjectContent, context.CallingClass,
			                                  context.CaretLine, context.CaretColumn, name + "Attribute", 0);
		}
		public static IReturnType CreateReturnType(AST.TypeReference reference, IClass callingClass,
		                                           IMethodOrProperty callingMember, int caretLine, int caretColumn,
		                                           IProjectContent projectContent)
		{
			System.Diagnostics.Debug.Assert(projectContent != null);
			if (reference == null) {
				return GetDefaultReturnType(projectContent);
			}
			if (reference is AST.ArrayTypeReference) {
				AST.ArrayTypeReference arr = (AST.ArrayTypeReference)reference;
				return new ArrayReturnType(projectContent,
				                           CreateReturnType(arr.ElementType, callingClass, callingMember,
				                                            caretLine, caretColumn, projectContent),
				                           (arr.Rank != null) ? (int)arr.Rank.Value : 1);
			} else if (reference is AST.SimpleTypeReference) {
				string name = ((AST.SimpleTypeReference)reference).Name;
				IReturnType rt;
				int typeParameterCount = (reference is AST.GenericTypeReference) ? ((AST.GenericTypeReference)reference).GenericArguments.Count : 0;
				if (name == "duck")
					rt = new BooResolver.DuckClass(new DefaultCompilationUnit(projectContent)).DefaultReturnType;
				else if (BooAmbience.ReverseTypeConversionTable.ContainsKey(name))
					rt = new GetClassReturnType(projectContent, BooAmbience.ReverseTypeConversionTable[name], typeParameterCount);
				else if (callingClass == null)
					rt = new GetClassReturnType(projectContent, name, typeParameterCount);
				else
					rt = new SearchClassReturnType(projectContent, callingClass, caretLine, caretColumn,
					                               name, typeParameterCount);
				if (typeParameterCount > 0) {
					AST.TypeReferenceCollection arguments = ((AST.GenericTypeReference)reference).GenericArguments;
					// GenericTypeReference derives from SimpleTypeReference
					IReturnType[] typeArguments = new IReturnType[arguments.Count];
					for (int i = 0; i < typeArguments.Length; i++) {
						typeArguments[i] = CreateReturnType(arguments[i], callingClass, callingMember, caretLine, caretColumn,
						                                    projectContent);
					}
					rt = new ConstructedReturnType(rt, typeArguments);
				}
				return rt;
			} else if (reference is AST.CallableTypeReference) {
				AST.CallableTypeReference ctr = (AST.CallableTypeReference)reference;
				AnonymousMethodReturnType amrt = new AnonymousMethodReturnType(new DefaultCompilationUnit(projectContent));
				if (ctr.ReturnType != null) {
					amrt.MethodReturnType = CreateReturnType(ctr.ReturnType, callingClass, callingMember, caretLine, caretColumn, projectContent);
				}
				amrt.MethodParameters = new List<IParameter>();
				AddParameters(ctr.Parameters, amrt.MethodParameters, callingMember, callingClass ?? new DefaultClass(new DefaultCompilationUnit(projectContent), "__Dummy"));
				return amrt;
			} else {
				throw new NotSupportedException("unknown reference type: " + reference.ToString());
			}
		}