class Spec::Matchers::SimpleMatcher

def description
  @description || explanation
end

def explanation
  "No description provided. See RDoc for simple_matcher()"
end

def failure_message_for_should
  @failure_message || (@description.nil? ? explanation : %[expected #{@description.inspect} but got #{@given.inspect}])
end

def failure_message_for_should_not
  @negative_failure_message || (@description.nil? ? explanation : %[expected not to get #{@description.inspect}, but got #{@given.inspect}])
end

def initialize(description, &match_block)
  @description = description
  @match_block = match_block
  @failure_message = @negative_failure_message = nil
end

def matches?(given)
  @given = given
  case @match_block.arity
  when 2
    @match_block.call(@given, self)
  else
    @match_block.call(@given)
  end
end