vendor/twig/twig/doc/functions/constant.rst

   1 ``constant``
   2 ============
   3
   4 .. versionadded: 1.12.1
   5     constant now accepts object instances as the second argument.
   6
   7 ``constant`` returns the constant value for a given string:
   8
   9 .. code-block:: jinja
  10
  11     {{ some_date|date(constant('DATE_W3C')) }}
  12     {{ constant('Namespace\\Classname::CONSTANT_NAME') }}
  13
  14 As of 1.12.1 you can read constants from object instances as well:
  15
  16 .. code-block:: jinja
  17
  18     {{ constant('RSS', date) }}