On Nov 12, 2011, at 5:10 AM, Russell Leggett wrote: >> > > Regardless of the implementation of primitive values, couldn't we say that > the semantics of a weak map ignore primitive keys and look only at the value. > Primitive keys are exceptionally common for maps, and this would open up a > lot of potential uses, especially regarding caching. >
What you are asking for is a "weak array" (or an array of "weak references"). While some people think that such things have utility others are concerned that they expose GC based non-determination which they don't want to allow into the language. Allen
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