Re: upcoming changes in Lua 5.2 [was Re: Location of a package]

["Alex Davies" <alex.mania@...>]

Very interesting. Would it be possible to raise an error in this rather rare 
case? Although I imagine it would be hard to implement the checks in the 
compiler, I would consider continue worth the added complexity. For the 
record, I've found the 5.1 scope rule change handy in the past ;).

- Alex

----- Original Message ----- 
From: "Roberto Ierusalimschy" <roberto@inf.puc-rio.br>
To: "Lua list" <lua@bazar2.conectiva.com.br>
Sent: Monday, February 25, 2008 9:28 PM
Subject: Re: upcoming changes in Lua 5.2 [was Re: Location of a package]


> Now, consider the addition of 'continue':
>
>  repeat
>    ...
>    if something then continue end
>    ...
>    local x = ...
>    ...
>  until something-with-x
>
> We have two options: either the continue jumps into the scope of 'x'
> bypassing its declaration/initialization (very bad), or the continue
> skips the test altogether (very bad too).
>
> So, it seems that continue is incompatible with this scope rule...
>
> -- Roberto