Module: Prototype::Prototypical::ClassMethods

Defined in:
lib/alib-0.5.1/prototype.rb,
lib/alib-0.5.1/prototype-0.3.0.rb

Instance Method Summary collapse

Instance Method Details

#__prototype_eval__(&b) ⇒ Object 



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# File 'lib/alib-0.5.1/prototype.rb', line 48

def __prototype_eval__ &b
  tid = Thread.current.object_id.abs
  src, dst = "method_missing", "__method_missing_#{ tid }__"
  aliased = false

  __prototype_singleton_class__{
    unless respond_to? dst 
      alias_method dst, src
      aliased = true 
    end

    def method_missing m, *a, &b
      __prototype_barewords_can_set_and_get_ivars_and_define_methods__ m, *a, &b
    end

    def __prototype_barewords_can_set_and_get_ivars_and_define_methods__ m, *a, &b
      if b
        define_method m, *a, &b
      else
        ivar = "@#{ m }"
        if a.size == 0
          defined?(ivar) ? instance_variable_get(ivar) : super
        elsif a.size == 1
          instance_variable_set ivar, a.shift
        else
          __method_missing__(m, *a, &b) 
        end
      end
    end
  }

  module_eval &b

ensure
  __prototype_singleton_class__{ alias_method src, dst } if aliased
end

#__prototype_prototype__(&b) ⇒ Object 



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# File 'lib/alib-0.5.1/prototype.rb', line 94

def __prototype_prototype__ &b
  return unless b

  __prototype_eval__ &b

  table =
    instance_variables.inject({}) do |t,ivar|
      value = 
        instance_eval do
          begin
            instance_variable_get ivar
          ensure
            remove_instance_variable ivar
          end
        end
      t.update ivar => value
    end

  __prototype_table__.update table
end

#__prototype_singleton_class__(&b) ⇒ Object 



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# File 'lib/alib-0.5.1/prototype.rb', line 85

def __prototype_singleton_class__ &b
  sc =
    class << self
      self
    end
  sc.module_eval &b if b
  sc
end

#__prototype_table__ ⇒ Object

uses closure/init to avoid instance-var



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# File 'lib/alib-0.5.1/prototype.rb', line 33

def __prototype_table__  # uses closure/init to avoid instance-var 
  __prototype_singleton_class__{
    table = {}
    define_method('__prototype_table__'){ table }
  }
  __prototype_table__    # does not recurse!
end

#__prototype_table_inject__(other) ⇒ Object 



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# File 'lib/alib-0.5.1/prototype.rb', line 41

def __prototype_table_inject__ other
  __prototype_table__.each do |ivar, value|
    other.instance_variable_set ivar, value
  end
  __prototype_table__.clear
end