lib/rley/gfg/item_vertex.rb in rley-0.3.04 vs lib/rley/gfg/item_vertex.rb in rley-0.3.05

@@ -8,65 +8,64 @@
     # Represents a specialized vertex in a grammar flow graph
     # that is associated to a given dotted item.
     # Responsibilities (in addition to inherited ones):
     # - Know its related non-terminal symbol
     class ItemVertex < Vertex
-        # Link to the dotted item object
-        attr_reader :dotted_item
+      # Link to the dotted item object
+      attr_reader :dotted_item
 
-        # Optional link to a "shortcut" edge.
-        # Applicable only if the dotted expects a non-terminal symbol.
-        attr_reader :shortcut
+      # Optional link to a "shortcut" edge.
+      # Applicable only if the dotted expects a non-terminal symbol.
+      attr_reader :shortcut
 
       def initialize(aDottedItem)
         super()
         @dotted_item = aDottedItem
       end
-      
+
       # Set the "shortcut" edge.
       def shortcut=(aShortcut)
         unless aShortcut.kind_of?(ShortcutEdge)
-          fail StandardError, 'Invalid shortcut argument'
+          raise StandardError, 'Invalid shortcut argument'
         end
 =begin
         unless next_symbol && next_symbol.kind_of?(Syntax::NonTerminal)
-          fail StandardError, 'Invalid shortcut usage'
+          raise StandardError, 'Invalid shortcut usage'
         end
-        
+
         shortcut_d_item = aShortcut.successor.dotted_item
         unless (dotted_item.production == shortcut_d_item.production) &&
           (dotted_item.position == shortcut_d_item.prev_position)
-          fail StandardError, 'Shortcut refers to wrong vertex'
+          raise StandardError, 'Shortcut refers to wrong vertex'
         end
-=end        
+=end
         @shortcut = aShortcut
       end
 
       def label()
-        return "#{dotted_item}"
+        return dotted_item.to_s
       end
 
       # Returns true if the dotted item has a dot at the end of the production.
       def complete?()
         return dotted_item.reduce_item?
       end
 
       # Return the symbol before the dot else nil.
       def prev_symbol()
         return dotted_item.prev_symbol
-      end      
-      
+      end
+
       # Return the symbol after the dot else nil.
       def next_symbol()
         return dotted_item.next_symbol
       end
-      
+
       # Return the non-terminal symbol at the left-hand side of the production
       def lhs()
         return dotted_item.lhs
       end
-
     end # class
   end # module
 end # module
 
-# End of file
\ No newline at end of file
+# End of file