def self.use_custom_matcher_or_delegate(operator)
define_method(operator) do |expected|
if uses_generic_implementation_of?(operator) && matcher = OperatorMatcher.get(@actual.class, operator)
@actual.__send__(::RSpec::Matchers.last_should, matcher.new(expected))
else
eval_match(@actual, operator, expected)
end
end
negative_operator = operator.sub(/^=/, '!')
if negative_operator != operator && respond_to?(negative_operator)
define_method(negative_operator) do |expected|
opposite_should = ::RSpec::Matchers.last_should == :should ? :should_not : :should
raise "RSpec does not support `#{::RSpec::Matchers.last_should} #{negative_operator} expected`. " +
"Use `#{opposite_should} #{operator} expected` instead."
end
end
end