Re: [ANN] Lua 5.4.0 (alpha) now available
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- Subject: Re: [ANN] Lua 5.4.0 (alpha) now available
- From: Andrew Gierth <andrew@...>
- Date: 2019年6月24日 00:57:59 +0100
>>>>> "Sean" == Sean Conner <sean@conman.org> writes:
>> This is one of only two places in the whole Lua codebase, and is the
>> only library function, where __close is used (in both cases the code
>> just sets __close = __gc).
Sean> Now that I think about it, why have __close at all? Why not
Sean> have locals marked as <toclose> just call __gc upon leaving
Sean> scope?
1) you might not want __close and __gc to do the same thing, and if you
do want it, it's trivial to assign the same function to both
2) it would allow any object with __gc but not __close to be assigned to
a toclose variable, and that breaks a sandbox's control over error
handling
--
Andrew.