Ruby调用者实验

Posted 2021-02-26

class Kung
  mstr = %-
        def foo
          puts 'Hello World from Kung.foo'
          puts caller(0).inspect
        end
      -
  module_eval mstr
end
 
Kung.new.foo
 
 
 
class Monkey
  line, mstr = __LINE__, %-
        def see
          puts 'Hello World from Monkey.see'
          puts caller(0)
        end
      -
  module_eval mstr, __FILE__, line
end
 
Monkey.new.see
 
 
class Monkey
  module_eval(<<-EOS, __FILE__, __LINE__)
        def see
          puts 'Hello World from Monkey.see'
          puts  caller(0)
        end
      EOS
end
 
Monkey.new.see