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26 lines
724 B
Lua
26 lines
724 B
Lua
3 years ago
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--[=[
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@c WeakCache x Cache
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@mt mem
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@d Extends the functionality of a regular cache by making use of weak references
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to the objects that are cached. If all references to an object are weak, as they
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are here, then the object will be deleted on the next garbage collection cycle.
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]=]
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local Cache = require('iterables/Cache')
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local Iterable = require('iterables/Iterable')
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local WeakCache = require('class')('WeakCache', Cache)
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local meta = {__mode = 'v'}
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function WeakCache:__init(array, constructor, parent)
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Cache.__init(self, array, constructor, parent)
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setmetatable(self._objects, meta)
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end
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function WeakCache:__len() -- NOTE: _count is not accurate for weak caches
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return Iterable.__len(self)
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end
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return WeakCache
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