Contents

= Parametric Include

Load the library.

  require 'paramix'

Given a parametric mixin.

  module M
    include Paramix::Parametric

    parameterized do |params|

      public :f do
        params[:p]
      end

    end
  end

We can inlcude the parameteric module in a some classes.

  class I1
    include M[:p => "mosh"]
  end

  class I2
    include M[:p => "many"]
  end

And the result will vary according to the parameter set.

  I1.new.f  #=> "mosh"
  I2.new.f  #=> "many"


= Parametric Extension

We can also extend classes witht the mixin.

  class E1
    extend M[:p => "mosh2"]
  end

  class E2
    extend M[:p => "many2"]
  end

And the results will likewise work as expected.

   E1.f  #=> "mosh2"
   E2.f  #=> "many2"


= Dynamically Defined Methods

Parametric mixins can be used to define dynamic code.

  module N
    include Paramix::Parametric

    parameterized do |params|
      attr_accessor params[:a]
    end
  end

Now if we include this module we will have new attributes based on
the parameter assigned.

  class D1
    include N[:a => "m1"]
  end

  class D2
    include N[:a => "m2"]
  end

  d1 = D1.new
  d1.m1 = :yes1

  d1.m1  #=> :yes1

  d2 = D2.new
  d2.m2 = :yes2

  d2.m2  #=> :yes2

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
paramix-2.0.1	qed/02_general.rdoc