Re: Packaging and importing

[Chris Marrin <chris@...>]

Tomas wrote:

> ...
> > > Also, has anyone made a proposal for how you can promote all the 
> > > members of "a" into the namespace of the module that requires "a"?
>
>     Why don't you inherit the symbols from "a" with something
> like:
>
> require"a"
> _M = {}
> setmetatable (_M, { __index = a }) -- inherit from "a"
> setfenv (1, _M) -- new environment (global table)
>
>     If "a" inherits from the global table you'll get all global
> through it!

Ok, I'm liking this. Now I think my only question is whether all 
functions defined after the setfenv() inherit the same environment. If 
so, then I think I can make nice isolated objects this way.

Of course, I think I might have to do something a bit more complex with 
__index, if I want this module to be able to access the real global 
table as well, right? I would have to make __index a function which 
first checked in 'a' then in _G. Or maybe I just want to go through and 
copy each member of 'a' (or some subset) into _M. then I could do:

    setmetatable (_M, { __index = _G })
    ... add some or all of the members of 'a' to _M ...

then I would be able to see everything I need, wouldn't I???

--
chris marrin              ,""$, "As a general rule,don't solve puzzles
chris@marrin.com        b`    $  that open portals to Hell" ,,.
        ,.`           ,b`    ,`                            , 1$'
     ,|`             mP    ,`                              :$$'     ,mm
   ,b"              b"   ,`            ,mm      m$$    ,m         ,`P$$
  m$`             ,b`  .` ,mm        ,'|$P   ,|"1$`  ,b$P       ,`  :$1
 b$`             ,$: :,`` |$$      ,`   $$` ,|` ,$$,,`"$$     .`    :$|
b$|            _m$`,:`    :$1   ,`     ,$Pm|`    `    :$$,..;"'     |$:
P$b,      _;b$$b$1"       |$$ ,`      ,$$"             ``'          $$
 ```"```'"    `"`         `""`        ""`                          ,P`