Diacritics in the PUA range?

[pickaxe828]

I am currently working on making a font for a conlang.

Blue: Characters
Orange: Diacritics

I want to keep the range of characters in PUA, so when the font is used with normal texts, normal texts won't be affected.
This is one of the diacritics.

So how do I make a PUA unicode become a diacritic with mkfont?
How can I configure some specific OpenType features?
Is it possible to do within mkfont?

[Nebukam]

Hey there!

Sadly mkfont doesn't explicitly support OpenType features -- some are supported under the hood, but the library I'm using doesn't support character variants nor kerning (ugh, I know :( )

Depending on your conlang architecture, you may be able to hijack existing sets that have matching diacritics? Otherwise you'll have to resort to create individual ligatures for each possible combination in lieu of OpenType ones. (which, using the component system, is very maintainable!)

As for PUA, although it's a bit painful to do, you can access them at the very bottom of the Unicode blocks in the Content browser area:

[Edit: I realize you probably already knew about the PUA selector -_-]

[pickaxe828]

After a bit of research, I found this tutorial that helps me to implement my conlang font
And I found this tutorial for Fontforge
https://www.youtube.com/watch?v=io56-xzCbms
Can mkfont also do this?
i.e.: Adding mark/ mkmk anchors to characters/ PUA characters?

[Nebukam]

hmmm sadly no, I need to change the underlying font engine to support more advanced features :(
This is something I plan on doing in the future but I need to evaluate how much work that means first and I don't have a lot of time to focus on that at the moment.