forwardable¶

Notes¶

The forwardable library included in Sapphire is a heavily refactored version of the one that ships with MRI.

The SingleForwardable module has been removed entirely since it was rarely used and not very useful. Instead a single, unified interface has been provided. This is in addition to some code cleanup (making it warning free) and documentation improvements.

Synopsis¶

class Foo
   extend Forwardable
   delegate :length => :@str
   delegate [:first, :last] => :@arr

   def initialize
      @arr = ["foo","bar","baz"]
      @str = "hello" 
   end
end

f = Foo.new
puts f.length # 5, length of @str
puts f.first  # "foo", first element of @arr
puts f.last   # "baz", last element of @arr

Acknowledgements¶

Florian Groß was a co-author on the new Forwardable module.