From: Saynatkari <ruby-ml@...>
Date: 2005-04-02T07:59:59+09:00
Subject: Re: Kernel.load() behaviour


Con fecha 1/4/2005, "Saynatkari" <ruby-ml@magical-cat.org> escribi�:

>
>Con fecha 1/4/2005, "Brian Mitchell" <binary42@gmail.com> escribi�:
>
>>On Apr 1, 2005 2:44 PM, Andrew Walrond <andrew@walrond.org> wrote:
>>> On Friday 01 April 2005 22:37, Brian Mitchell wrote:
>>> > On Apr 1, 2005 11:48 AM, Aredridel <aredridel@gmail.com> wrote:
>>> > > > Not quite; Each of the 000s of packages is in it's own file....  ;)
>>> > >
>>> > > eval "module Packages\n" << `cat *.rb` << "\nend"
>>> > >
>>> > > ;-)
>>> >
>>> > module Packages
>>> > end
>>> >
>>> > Packages.module_eval( `cat glibc.rb`, 'glibc.rb`) # A little more elegant.
>>> >
>>>
>>> Almost perfect, but this avoids the external 'cat' dependency:
>>>
>>> Packages.module_eval( IO.readlines('glibc.rb').join, 'glibc.rb')
>>>
>>> I learned some more ruby today. Thanks all!
>>
>>One more idea that lets one use load and allows anonymous modules:
>>
>>glibc.rb:
>>class Glibc
>>end
>>
>>some_file.rb:
>>module Packages
>>end
>>
>>class Package
>>  def self.inherited(sub)
>>    Packages.const_set(sub.name.split("::").last, sub)
>>  end
>>end
>>
>>load 'glibc.rb', true
>>
>># Packages.constants == ["Glibc"]
>
>This will still pollute the namespace, though, at
>the initial loading. That seemed to be Andrew's
>concern.

Meh. Obviously ignore that.

>>I also have an idea on how to do this with load my appending the
>>anonymous module BUT I couldn't get Module.nesting to work and it
>>seems ruby take some shortcuts in creation of the anon Module. If I
>>can fix this then we'll all be able to load into specific modules
>>which would be nice.
>
>I submitted an RCR about this type of load behaviour (specifically
>to enable the client programmer define a namespace for an imported
>module rather than having the library author do it).
>
>While the solutions here are likely suitable for this particular
>situation, the more general problem is trying to load a file like
>this:
>
>class String
>  def my_string_extension()
>    # ...
>  end
>end
>
>module MyModule
>  class MyClass
>    # ...
>  end
>end
>
>The presumed extension of the standard String class will instead
>create a new String class in the enveloping module.
>
>>Brian.

E