Symfony2 Use PHP Class Constant in YAML Config?

Question

I know this is probably not possible, but is there a clean way to use a PHP class constant within a YAML config/services/etc. file for Symfony2?

For example, if I ha

Answer 1

For Symfony >=2.4 you can use expression language

Example:

'@=constant("Symfony\\Bridge\\Monolog\\Logger::INFO")'