disposable - Factor Documentation (original) (raw)
disposable
Factor handbook » The language » Deterministic resource disposal » Writing new destructors
| Next: | new-disposable ( class -- disposable ) |
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Vocabulary
destructors
Class description
Parent class for disposable resources. This class has two slots:
| disposed | A boolean value, set to true by dispose. Assert that it is false with check-disposed. |
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| continuation | The current continuation at construction time, for debugging. Set by new-disposable if debug-leaks? is on. |
New instances must be constructed with new-disposable and subclasses must implement dispose*.
Definition
TUPLE: disposable < identity-tuple
{ disposed boolean initial: f } continuation ;
Methods
USING: destructors destructors.private generic kernel ;
M: disposable dispose
[
[ unregister-disposable ]
[ M\ disposable dispose (call-next-method) ] bi
] unless-disposed ;