Change structure of EWF, to follow better categorization

library/utility/general/error/src/error_group.e

@@ -0,0 +1,75 @@
+note
+	description : "Objects that represent a group of errors"
+	legal: "See notice at end of class."
+	status: "See notice at end of class."
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	ERROR_GROUP
+
+inherit
+	ERROR
+
+create
+	make
+
+feature {NONE} -- Initialization
+
+	make (a_errors: LIST [ERROR])
+			-- Initialize `Current'.
+		do
+			name := a_errors.count.out + " errors"
+			create {ARRAYED_LIST [ERROR]} sub_errors.make (a_errors.count)
+			sub_errors.fill (a_errors)
+		end
+
+feature -- Access
+
+	code: INTEGER = -1
+
+	name: STRING
+
+	message: detachable STRING_32
+		do
+			create Result.make_from_string (name)
+			from
+				sub_errors.start
+			until
+				sub_errors.after
+			loop
+				if
+					attached sub_errors.item as e and then
+					attached e.message as m
+				then
+
+					Result.append_character ('%N')
+					Result.append_string (m)
+				end
+				sub_errors.forth
+			end
+		end
+
+	sub_errors: LIST [ERROR]
+			-- Error contained by Current
+
+feature -- Visitor
+
+	process (a_visitor: ERROR_VISITOR)
+			-- Process Current using `a_visitor'.
+		do
+			a_visitor.process_group (Current)
+		end
+
+
+note
+	copyright: "Copyright (c) 1984-2011, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+	source: "[
+			Eiffel Software
+			5949 Hollister Ave., Goleta, CA 93117 USA
+			Telephone 805-685-1006, Fax 805-685-6869
+			Website http://www.eiffel.com
+			Customer support http://support.eiffel.com
+		]"
+end