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

[dcharno <dcharno@...>]

Roberto Ierusalimschy wrote:
> 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...

What would happen if someone wrote:

  repeat
    ...
    if not something then
       local x = ...
    end
    ...
  until something-with-x

Existing code would not break until someone adds a 'continue', then its 
not existing code ...