Re: [ANN] Lua 5.2.0 (beta-rc1) now available
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- Subject: Re: [ANN] Lua 5.2.0 (beta-rc1) now available
- From: Florian Weimer <fw@...>
- Date: 2011年6月14日 21:13:30 +0200
* Dirk Laurie:
> On Tue, Jun 14, 2011 at 08:18:58PM +0200, Florian Weimer wrote:
>> * Roberto Ierusalimschy:
>>
>> > Now, when the compiler sees label 0, label 2 and label 1 are out of
>> > scope, so it makes no sense to raise an error.
>>
>> Unless labels are of function scope, which I strongly recommend. I
>> really doubt Lua 5.2 implements non-local goto from a lexically nested
>> function to a label in the enclosing function. 8-)
> The reference manual clearly states:
>
>> A label is visible in the entire block where it is defined (including
>> nested blocks, but not nested functions).
And I think this is a mistake, both in implementation and in
specification.
(The same comment applies to the other subthread about the length
operator; I was not trying to understand the 5.2-beta reference
manual, I was trying to suggest an improvement.)