# File lib/spec/expectations/handler.rb, line 14
14:         def handle_matcher(actual, matcher, &block)
15:           unless matcher.respond_to?(:matches?)
16:             raise InvalidMatcherError, "Expected a matcher, got #{matcher.inspect}."
17:           end
18:           
19:           match = matcher.matches?(actual, &block)
20:           ::Spec::Matchers.generated_description = "should #{describe_matcher(matcher)}"
21:           Spec::Expectations.fail_with(matcher.failure_message) unless match
22:         end