Is it possible to apply a filter to the output of a tag?

[unitof]

I have a custom tr tag that returns internationalized strings from a dictionary, and I'd like to apply a Selmer filter to its output. Is that possible?

As a simple example: say {% tr core/greeting %} parses to Hello or Hola depending on a user's current language preference, and I'd like to then apply |upper to the output of that tag.

[yogthos]

There isn't a way to do that currently, but you can access the filters in the tag implementation, e.g: (:upper @selmer.filters/filters).

[boxxxie]

@unitof a tag is expected to output a rendered template, while a filter is an operation on a variable.
what you could do is create a filter tag, which you could wrap a tag in, which would apply an existing filter to the contents in a tag. this doesn't make sense for a lot of filters.

{% filter uppercase %}
    {% tr core/greeting %}
{% endfilter %}

another option is to add a filter as a tag param

{% tr core/greeting filters=uppercase|replace:whatever %} something like that. and how far you go with parsing would be up to you.

i think a param is probably better than a wrapper tag. i haven't run into needing to apply filters to tags, and i do a lot of weird stuff with templating. i think i would likely approach your tr tag solution as a filter itself, but that's a person preference.