On 27 jan 2011, at 17:42, Roberto Ierusalimschy wrote:
>>> I believe that this "break N" will kill code readability as sure as
>>> "goto" would.
>>
>> Yeah, I would get lost pretty quick! Named labels would help [...]
>
> If that could save Steve's right arm, we like the idea of break with
> labels.
>
> In Lua, we cannot have traditional labels, because the syntax "foo:"
> already has a different meaning. Instead, a simple syntax would be to
> add labels only to "do end" blocks, for instance like this:
>
> do :label:
> ...
> end
>
> Then, a continue could be written like here:
>
> while cond do
> do :process_item:
>
> break :process_item:
>
> end
> end
>
> There are several details that could change (other mark instead
> of colons, whether the label after break needs marks, whether an
> optional [or mandatory] label could be added after the corresponding
> 'end', etc.), but the basic idea would not change much.
>
> -- Roberto
>
>
