Method: Rewrite::ClassMethods#gensym

Defined in:

lib/rewrite.rb

#gensym ⇒ Object

Provide a symbol that is extremely unlikely to be used elsewhere.

Rewriters use this when they need to name something. For example, Andand converts code like this:

numbers.andand.inject(&:+)

Into:

lambda { |__1234567890__|
  if __1234567890__.nil?
    nil
  else
    __1234567890__.inject(&:+)
  end
}.call(numbers)

It uses Rewrite.gensym to generate 1234567890.

# File 'lib/rewrite.rb', line 75

def gensym
  :"__#{Time.now.to_i}#{rand(100000)}__"
end