You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: post_url.rb
    path of file: ./repos/bridgetown/bridgetown-core/lib/bridgetown-core/tags
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Bridgetown
  module Tags
    class PostComparer
      MATCHER = %r!^(.+/)*(\d+-\d+-\d+)-(.*)$!.freeze

      attr_reader :path, :date, :slug, :name

      def initialize(name)
        @name = name

        all, @path, @date, @slug = *name.sub(%r!^/!, "").match(MATCHER)
        un
    
      def post_date
        @post_date ||= Utils.parse_date(
          date,
          "'#{date}' does not contain valid date and/or title."
        )
      end

      def ==(other)
        other.relative_path.to_s.match(@name_regex)
      end

      def deprecated_equality(other)
        slug == post_slug(other) &&
          post_date.year  == other.date.year &&
          post_date.month == other.date.month &&
          post_date.day   == other.date.day
      end

      private

      # Construct the directory-aware post slug for a Bridgetown::Post
      #
      # other - the Bridgetown::Post
      #
      # Returns the post slug with the subdirectory (relative to _posts)
      def post_slug(other)
        other.data.slug
      end
    end