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38 |
38 |
39 documentation |
39 documentation |
40 " |
40 " |
41 This class is abstract and implements the visitor pattern. |
41 This class is abstract and implements the visitor pattern. |
42 It defines #visitXXX:with: messages for various kinds of objects. |
42 It defines #visitXXX:with: messages for various kinds of objects. |
43 Any of these messsages is eventually mapped to #visitObject:with:. |
43 Any of these messages is eventually mapped to #visitObject:with:. |
44 |
44 |
45 When a class redefines #acceptVisitor:with:, an method has to be defined here, too. |
45 When a class redefines #acceptVisitor:with:, an method has to be defined here, too. |
46 |
46 |
47 Subclasses have to define at least #visitObject:with: |
47 Subclasses have to define at least #visitObject:with: |
48 |
48 |