How to access class constants in Twig?

Question

I have a few class constants in my entity class, e.g.:

class Entity {
    const TYPE_PERSON = 0;
    const TYPE_COMPANY = 1;
}

In normal PH

Answer 1

After some years I realized that my previous answer is not really so good. I have created extension that solves problem better. It's published as open source.

https://github.com/dpolac/twig-const

It defines new Twig operator # which let you access the class constant through any object of that class.

Use it like that:

{% if entity.type == entity#TYPE_PERSON %}