From: Daniel Schierbeck <daniel.schierbeck@...>
Date: 2005-12-03T00:02:40+09:00
Subject: Re: Dynamic Modules

Daniel Schierbeck wrote:
> Trans wrote:
>> I would like to discuss the merits/non-merits and the best approach to
>> implementation of "dynamic modules" --modules that take parameters at
>> the time of include, thus altering their behavior per include. The
>> common denominator here is the altered interface of #include:
>>
>>   include AModule, :opt1 => :val1, :opt2 => :val2
>>
>> Here's a simple example based on the implementation I (and friends) put
>> together
>>
>>    module Mixin
>>
>>      dynamic_feature do |options|
>>
>>          define_method :hello do
>>            puts "Hello from #{options[:name]}"
>>          end
>>
>>      end
>>
>>    end
>>
>>    class MyClass
>>      include Mixin, :name => 'Ruby'
>>    end
>>
>>    m = MyClass.new
>>    m.hello -> 'Hello from Ruby'
>>
>>    class MyClass2
>>      include Mixin, :name => 'Tom'
>>    end
>>
>>    m = MyClass2.new
>>    m.hello -> 'Hello from Tom'
>>
>> T.
>>
> 
> I'd rather see this:
> 
>   class Module
>     def include(mod, *args, &block)
>       mod.send :append_features, self
>       if mod.respond_to? :included
>         mod.included(self, *args, &block)
>       end
>     end
>   end
> 
>   module Chewable
>     def self.included(klass, *args)
>       puts "Included in #{klass} with the following args:"
>       args.each { |arg| puts " * #{arg.inspect}" }
>     end
>   end
> 
>   class Klass
>     include Chewable "foo", "bar", "baz"
>   end
> 
> 
> Cheers,
> Daniel

That should of course be `include Chewable, "foo"...'