define symfony routing as service in symfony DI-container

router.yml

parameters:
  routing.file: 'routing_%core.name%.yml'
  routing.cache:
    debug: %core.debug%
    cache_dir: '%core.cache_path%/routing/'
    generator_cache_class: '%core.name%UrlGenerator%core.env%'
    matcher_cache_class:  '%core.name%UrlMatcher%core.env%'

services:
  routing.file_locator:
    public: false
    class: Symfony\Component\Config\FileLocator
    arguments:
      - [%core.root_dir%]

  routing.file_loader:
    public: false
    class: Symfony\Component\Routing\Loader\YamlFileLoader
    arguments:
      - @routing.file_locator

  routing.request:
    public: false
    class: Symfony\Component\HttpFoundation\Request
    factory: [@request_stack, 'getCurrentRequest']

  routing.request_context:
    public: false
    class: Symfony\Component\Routing\RequestContext
    calls:
      - [ fromRequest, [@routing.request] ]

  router:
    class: Symfony\Component\Routing\Router
    arguments:
      - @routing.file_loader
      - %routing.file%
      - %routing.cache%
      - @routing.request_context