Talk:Polymorphism: Difference between revisions
Content added Content deleted
m (Added missing signature (I happend to both not to be logged in, and forgetting the signature)) |
(No conceptual error) |
||
| Line 67: | Line 67: | ||
Of course in that case it would make sense to add a few more functions to Shape (e.g. a move function, or a function returning a bounding box). --[[User:Ce|Ce]] 08:26, 25 February 2007 (EST) |
Of course in that case it would make sense to add a few more functions to Shape (e.g. a move function, or a function returning a bounding box). --[[User:Ce|Ce]] 08:26, 25 February 2007 (EST) |
||
: The relation ''is-a'' is a notion of Liskov substitutability principle [LSP]. It is not necessarily related to inheritance and dynamic polymorphism. Sometimes the relation between types keeping all properties of the type (defined in some definite technical sense) is called '''LSP-subtyping''', and '''subclassing''', the latter, more loose relation. So-called LSP circle-ellipse controversy shows that the LSP notion of subtyping is practically (and theoretically too) unusable. Programming languages tend to more pragmatical "subclassing." --[[User:Dmitry-kazakov|Dmitry-kazakov]] 11:39, 3 November 2008 (UTC) |
|||