Heex: Macro support in custom components?

Do you mind throwing together a minimal example repro? I might be able to poke around in it if so.

Sure. Here’s a repo; this last commit gives an example. If you need to try it, clone it, then cd basic_phoenix/my_app && mix deps.get && mix.compile.
It will print:

"This will print, at compile time, a string containing 42"
[foo: 42]
"The goal is to also print here, at compile time, a string containing 42"
{:x1, [], :elixir_fn}

Why not use just <%= gettext("title") %>. This would also make it much easier for mix gettext.extract to find that string.

That means all the places supplying text need to call gettext(text) instead of just providing text as an assign and the component would make sure they’re wrapped in gettext(…) calls.

Exactly. The whole point is so that I can write <.text_field field={:first_name}/> instead of having to use <.text_field field={:first_name label={gettext(:labels, "first_name")}> but with mix gettext.extract still working.

José Valim confirmed that there is no solution currently. Either I use a macro and <%= %> form, or I manage to convince my team to use surface.