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

[Shmuel Zeigerman <shmuz@...>]

Javier Guerra wrote:
> On 2/25/08, Shmuel Zeigerman <shmuz@actcom.co.il> wrote:
> > IMO, the value of having 'continue' would be much greater than that of
> >  this scope rule. I'd love to see canceling this rule in favor of adding
> >  'continue'. That is, the expression-parameter of 'until' would resolve
> >  its variables in the scope enclosing the repeat loop.
>
> i'd vote that way too.  but how to do the transition? adding warnings
> to the compiler??

I think no warnings are needed. As in all other cases, it is the 
programmer's responsibility to take the scope into account. E.g., if the 
code says 'until x > 0', and x is not defined in the enclosing scope, 
it'll result in the run-time error "attempt to compare nil with number'.

--
Shmuel