Re: Question about the condition in `luaH_getint` function

[Mouse <mouse@...>]

>> It is there because 'luaH_realasize' can be a little expensive to
>> compute, so the redundancy avoids that call in a quite common case.

> Wouldn't it be better to use a more efficient test such as the
> following instead?  [...]

> This test does some bit hacks to test that key-1 is smaller than the
> next power of two of the limit.

I haven't read the code enough to be sure, but, doesn't that amount to
assuming that realasize is a power of two?  If so, it's brittle in that
it puts that knowledge somewhere it doesn't belong.

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