    # File lib/spec/expectations/handler.rb, line 7
            def handle_matcher(actual, matcher, &block)
              ::Spec::Matchers.last_should = "should"
              return Spec::Matchers::PositiveOperatorMatcher.new(actual) if matcher.nil?

              unless matcher.respond_to?(:matches?)
                raise InvalidMatcherError, "Expected a matcher, got #{matcher.inspect}."
              end

              match = matcher.matches?(actual, &block)
              ::Spec::Matchers.last_matcher = matcher
              Spec::Expectations.fail_with(matcher.failure_message) unless match
              match
            end