Re: modules and locals

[Andreas Matthias <andreas.matthias@...>]

Drake Wilson wrote:

> Quoth Andreas Matthias <andreas.matthias@gmail.com>, on 2010-08-23 23:11:15 +0200:
>> function foo()
>>    bar()
>> end
>> 
>> local function bar()
>> end
> [...]
>> What's going on here? I don't understand it.
> 
> The scope of a lexical local starts after its declaration and extends
> to the end of the containing block.  A local function is just like any
> other local variable in that regard.

Ok, that's reasonable. But why does lua find bar() if it is
defined as a non-local? Why doesn't it need a kind of
function prototype then?

>  One way of doing what you seem
> to want is to declare « local bar » above, then use « bar = function()
> ... end ».  Another, more obvious way would be to just let it be a
> 'global' (in the current environment table).

I see. So the following works:


local bar

function foo()
   bar()
end

bar = function () end


But what's happening if I change this to:


local bar

function foo()
   bar()
end

local bar = function () end


These two `bar's seem not to be the same. Why?


Ciao
Andreas