# File lib/rspec/matchers/built_in/raise_error.rb, line 5
        def initialize(expected_error_or_message=Exception, expected_message=nil, &block)
          @block = block
          @actual_error = nil
          case expected_error_or_message
          when String, Regexp
            @expected_error, @expected_message = Exception, expected_error_or_message
          else
            @expected_error, @expected_message = expected_error_or_message, expected_message
          end
        end