# File lib/rspec/expectations/syntax.rb, line 48
      def enable_should(syntax_host = default_should_host)
        return if should_enabled?(syntax_host)

        syntax_host.module_eval do
          def should(matcher=nil, message=nil, &block)
            ::RSpec::Expectations::PositiveExpectationHandler.handle_matcher(self, matcher, message, &block)
          end

          def should_not(matcher=nil, message=nil, &block)
            ::RSpec::Expectations::NegativeExpectationHandler.handle_matcher(self, matcher, message, &block)
          end
        end

        ::RSpec::Expectations::ExpectationTarget.enable_deprecated_should if expect_enabled?
      end