Adds fine-grained visibility semantics to Ruby, allowing you to make methods visible only to specific classes (and their subclasses).
$ [sudo] gem install friend
Or build it manually:
$ git clone git://github.com/lsegal/friend $ cd friend $ rake install
To use the library, require it and call
any module/class to export a method to a list of specific classes in the
export :methodname, Class1, Class2, ...
export is an alias of
friend. They do the exact same thing, though
depending on your semantics one terminology might be more suited than the
require 'friend' class A; def bar; D.new.foo end end class B; def bar; D.new.foo end end class C; def bar; D.new.foo end end class D def foo; "HELLO WORLD!" end # Export to A and B, but not C export :foo, A, B end puts A.new.bar puts B.new.bar puts C.new.bar # Output: # # HELLO WORLD! # HELLO WORLD! # export_features.rb:5:in `bar': `foo' is not accessible to C:Class (NoMethodError) # from export_features.rb.rb:16:in `<main>'
More examples can be found in the
Friend is written by Loren Segal © 2010, licensed under the BSD license.
This software can be redistributed and modified so long as it maintains the
copyright notice and
LICENSE file. See
LICENSE for more information.