RE: global & unique

["Zimmermann, Maik" <Zimmermann@...>]

Hi,

the problem here is that you are using the same instance of pr
in both coroutines. Try the following:

--
local function th(a)
            local function pr() print(s) end

	setfenv(pr, setmetatable({s = a}, {__index = _G}))
	pr()
	coroutine.yield()
	pr()
end

local co1, co2 = coroutine.create(th), coroutine.create(th)
coroutine.resume(co1, 1)
coroutine.resume(co2, 2)
coroutine.resume(co1)
coroutine.resume(co2)
--

Hope that helps
Maik

> >From manual:
> "Different instances of the same function may refer to 
> different
> external local variables and may have different environment 
> tables."
> 
> ---
> local function pr() print(s) end
> 
> local function th(a)
> 	setfenv(pr, setmetatable({s = a}, {__index = _G}))
> 	pr()
> 	coroutine.yield()
> 	pr()
> end
> 
> local co1, co2 = coroutine.create(th), coroutine.create(th)
> coroutine.resume(co1, 1)
> coroutine.resume(co2, 2)
> coroutine.resume(co1)
> coroutine.resume(co2)
> ---
> Prints:
> 1
> 2
> 2
> 2
> 
> Expecting:
> 1
> 2
> 1
> 2
> 
> I don't understand, why functions have own environment
> and not use environment of current thread?
>