Disable selected ligatures

[DNF2]

Julia uses dotted operators extensively to broadcast operations (basically vectorizing them.) Any operator can have a dot added to it, and this includes all unicode operators as well.

Fira Code has ligatures for a small number of dotted operators, namely .- and .= (as far as I know). In code that looks inconsistent:

Since there is no realistic way that ligatures can be added for all allowable operators, is it possible to disable the ligatures for .= and .-?

[tonsky]

thanks, I’ll consider this

[curran]

FWIW, I've managed to disable selected ligatures by running https://github.com/ToxicFrog/Ligaturizer on the original Fira Mono, with custom configuration.

[marius311]

@curran any chance you could share more on how you did this?

This is such a beautiful font for Julia except for this issue unforuntatley, as broadcasting is ubiquitous.

[curran]

@marius311 You can comment out certain ligatures in this file https://github.com/ToxicFrog/Ligaturizer/blob/master/ligatures.py , then run the build process to generate the font with commented out ligatures not present.

This is also mentioned in the README https://github.com/ToxicFrog/Ligaturizer#automatic

This repo that adds only the arrow ligatures to Ubuntu Mono may be of interest: https://github.com/datavis-tech/ubuntu-mono-ligaturized/tree/master/arrowized

It shows you can remove pretty much everything from that ligatures.py file and it will work just fine https://github.com/datavis-tech/ubuntu-mono-ligaturized/blob/master/arrowized/ligatures.py

[pag]

Another straightforward way to remove the ligatures of your choice:

• Clone this repo
• Install the prerequisites for running the font build script (sh scripts/bootstrap_macos.sh or bootstrap_linux.sh)
• Confirm that you can generate the font files that you want (e.g. sh scripts/build_ttf.sh)
• Open FiraCode.glyphs in a text editor, find the line name = calt;, then in the long line above that delete the ligatures that you want. For example, to remove the ligature ~> ⇝ (which makes my shell prompt look silly and ruins the highlighting there), find the part in that line starting from lookup asciitilde_greater and delete to the end of the block, i.e. the end of the next \012\012.
• Generate the font files.

[tonsky]

Moved both .- and .= to character variants in v6

[jhpratt]

Hi @tonsky, could you check that .= is correct? After upgrading to v6, all ligatures/variants work as expected except this one, which seems to be always enabled. I've checked both in VS Code (without it explicitly enabled) and in gedit, which as far as I can tell doesn't have an option to change the default ligatures.

[tonsky]

[jhpratt]

Hm. Glad to see that it's working as expected, but now I'm wondering why mine isn't doing what I had hoped. Fortunately I rarely have those two characters together, so I don't care enough to dig further as it's just me.

Thanks for the response! :)