method.rb

      # Given a string representing a method name and optionally a binding to
      # search in, find and return the requested method wrapped in a `Pry::Method`
      # instance.
      #
      # @param [String, nil] name The name of the method to retrieve, or `nil` to
      #   delegate to `from_binding` instead.
      # @param [Binding] target The context in which to search for the method.
      # @param [Hash] options
      # @option options [Boolean] :instance Look for an instance method if `name` doesn't
      #   contain any context.
      # @option options [Boolean] :methods Look for a bound/singleton method if `name` doesn't
      #   contain any context.
      # @return [Pry::Method, nil] A `Pry::Method` instance containing the requested
      #   method, or `nil` if no method could be located matching the parameters.
      def from_str(name, target=TOPLEVEL_BINDING, options={})
        if name.nil?
          from_binding(target)
        elsif name.to_s =~ /(.+)\#(\S+)\Z/
          context, meth_name = $1, $2
          from_module(target.eval(context), meth_name, target)
        elsif name.to_s =~ /(.+)(\.|::)(\S+)\Z/
          context, meth_name = $1, $3
          from_obj(target.eval(context), meth_name, target)