Abstract type: Difference between revisions
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procedure Process (X : in out Node) is abstract; -- To be implemented</lang> |
procedure Process (X : in out Node) is abstract; -- To be implemented</lang> |
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Here Node is an abstract type that is inherited from Limited_Controlled and implements a node of a [[Doubly-Linked List (element) | doubly linked list]]. It also implements the interface of a queue described above, because any node can be considered a head of the queue of linked elements. For the operation Finalize an implementation is provided to ensure that the element of a list is removed from there upon its finalization. The operation itself is inherited from the parent type Limited_Controlled and then overridden. The operations Dequeue and Enqueue of the Queue interface are also implemented. |
Here Node is an abstract type that is inherited from Limited_Controlled and implements a node of a [[Doubly-Linked List (element) | doubly linked list]]. It also implements the interface of a queue described above, because any node can be considered a head of the queue of linked elements. For the operation Finalize an implementation is provided to ensure that the element of a list is removed from there upon its finalization. The operation itself is inherited from the parent type Limited_Controlled and then overridden. The operations Dequeue and Enqueue of the Queue interface are also implemented. |
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=={{header|C}}== |
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Doing abstract types in C is not particularly trivial as C doesn't really support classes. The following series will show an abstract type, followed by a realizable class that provides the abstract interface, and finally followed by an exampleof usage. |
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=={{header|C#}}== |
=={{header|C#}}== |
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