bindings

bindings is a Ruby gem that allows the bindings of calling methods to be accessed. Using this gem, you can easily access variables from calling methods, which makes it very easy to implement templating systems or other utilities that need similar access.

To access variables or other attributes of calling methods, just call Binding.of_caller(n) where n is a number that represents how many callers back you are requesting.

outer = 40

class A
  def a
    a = 30
    B.new.b
  end
end

class B
  def b
    b = 20
    C.new.c
  end
end

class C
  def c
    c = 10
    puts Binding.of_caller(0).eval('local_variables') # c
    puts Binding.of_caller(1).eval('local_variables') # b
    puts Binding.of_caller(2).eval('local_variables') # a
    puts Binding.of_caller(3).eval('local_variables') # outer
    puts Binding.of_caller(999).eval('local_variables') rescue puts($!)
  end
end

A.new.a

c
b
a
outer
no such frame

This software is licensed under terms of the MIT License.