[erlang-questions] package namespaces question

Angel Alvarez <>
Tue Nov 10 20:58:05 CET 2009


Gracias Enrique!

But how can i import all system modules and apps?

Has gs become lib.gs or something alike?

Well, the URLS from 2004 were bit old ive just found the current version at http://www.erlang.org/doc/man/packages.html  

I saw no prior examples of packcages used on the list certainly not back in 2008/2009 so an " almost deprecated" notice at the top 
of the page is all i need to stop at here and continue reading other things....

/Angel

El Martes, 10 de Noviembre de 2009 Enrique Marcote escribió:
> Hola Angel,
> 
> Try importing gs.
> 
> Saludos,
> 
> Enrique
> 
> 
> El 10/11/2009, a las 20:10, Angel Alvarez escribió:
> 
> > Hi Guys!
> > 
> > Im currently reading erlang archives from 2004
> > 
> > On 10/05/2004 Someone talked about package namespaces ("Is erlang too small" thread) so i decided to just test this "new2 erlang knowledge.
> > 
> > iv just borrowed some little code from a gs article... :-)
> > 
> > the module starts like this:
> > 
> > 
> > -module(gui).
> > -export([init/0]).
> > 
> > init() ->
> >    S = gs:start(),
> >    Win = gs:create(window, S, [{width, 350}, {height, 100}]),
> >    gs:create(button, quit, Win, [{label, {text, "Quit"}}, {x, 0}]),
> > ...
> > 
> > so on the erlang shell gui:init(). just runs the example..
> > So i changed the module to use package style names...
> > 
> > 
> > -module(angel.tests.gui).
> > -export([init/0]).
> > 
> > init() ->
> >    S = gs:start(),
> >    Win = gs:create(window, S, [{width, 350}, {height, 100}]),
> >    gs:create(button, quit, Win, [{label, {text, "Quit"}}, {x, 0}]),
> > ...
> > 
> > and moved the gui.erl to $PWD/angel/test/gui.erl
> > 
> > 
> >> :~/Datos/Docs/Personal/Erlang/Code/angel/test> erlc gui.erl
> >> cd ../../
> >> :~/Datos/Docs/Personal/Erlang/Code/ 
> > 
> > but now firing at the shell results in :
> > 
> > :~/Datos/Docs/Personal/Erlang/Code> erl
> > Erlang R13B01 (erts-5.7.2) [source] [rq:1] [async-threads:0] [hipe] [kernel-poll:false]
> > 
> > Eshell V5.7.2  (abort with ^G)
> > 1> angel.test.gui:init().
> > ** exception error: undefined function 'angel.test.gs':start/0
> >     in function  'angel.test.gui':init/0
> > 
> > What's wrong? 
> > Is needed the same convention on the rest of modules 
> > after you start using package name styles?
> > 
> > 
> > From http://www.erlang.se/publications/packages.html
> > 
> > "m2:g(X) becomes a call to foo.bar.m2 
> > 
> > If this is not what was intended, the call can be written explicitly, as in 
> >    -module(foo.bar.m1).
> >    -export([f/1]).
> > 
> >    f(X) -> fee.fie.foe.m2:g(X)."
> > 
> > it seems bit embarrasing, i think is why perhaps no one is using this feature 5 years later...
> > 
> > 
> > Thanks Angel
> > -- 
> > No imprima este correo si no es necesario. El medio ambiente está en nuestras manos.
> > ->>-----------------------------------------------
> >    Clist UAH a.k.a Angel
> > ---------------------------------[www.uah.es]-<<--
> > 
> > Tú lo compras, yo lo copio. Todo legal.
> > 
> > ________________________________________________________________
> > erlang-questions mailing list. See http://www.erlang.org/faq.html
> > erlang-questions (at) erlang.org
> > 
> 
> 



-- 
Agua para todo? No, Agua para Todos.
->>-----------------------------------------------
    Clist UAH a.k.a Angel
---------------------------------[www.uah.es]-<<--

No le daría Cocacola Zero, ni a mi peor enemigo. Para eso está el gas Mostaza que es mas piadoso.


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