Re: [Proposal] break do end

[Rena <hyperhacker@...>]

On Wed, Aug 27, 2014 at 11:00 PM, Coda Highland <chighland@gmail.com> wrote:
> On Wed, Aug 27, 2014 at 7:35 PM, Thiago L. <fakedme@gmail.com> wrote:
>>
>> On 27/08/14 11:34 PM, Coda Highland wrote:
>>>
>>> On Wed, Aug 27, 2014 at 7:17 PM, Thiago L. <fakedme@gmail.com> wrote:
>>>>
>>>> It would be cool if you could use break with do ... end for some sort of
>>>> "safe goto"
>>>>
>>>> Example:
>>>>
>>>> do
>>>> break
>>>> local x = "you'll never see me"
>>>> print(x)
>>>> end
>>>> print("something")
>>>>
>>>> Would print "something"
>>>>
>>>> In 5.2+ we have this:
>>>>
>>>> goto x
>>>> local x = ""
>>>> ::x::
>>>> print("something")
>>>>
>>>> But it errors instead of doing the scoping stuff you can do with do ...
>>>> end
>>>>
>>>> (This is probably not something for lua 5 but for lua 6 if/when we get
>>>> it...
>>>> it would probably be less harmful to change goto so that it does an
>>>> implicit
>>>> do ... end scoping thingy)
>>>>
>>> repeat
>>>    -- statements here
>>>    break
>>>    -- rest of statements skipped
>>> until false
>>>
>>> /s/ Adam
>>>
>> until true*, but that's uglier
>>
>
> No, until true would make it loop. until false makes the body of the
> loop execute exactly once.
>
> /s/ Adam
>

The logic is "until true == true", so it will only loop once. You're
thinking of "while true".

-- 
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