Some ligatures are missing in various editors (Emacs, Atom, Idea)

[andreyorst]

Hello, thanks for this great font!

I've noticed that not all ligatures, listed on official page are working though. I was able to reproduce this issue with two text editors. First was Emacs, with HarfBuzz, and auto-composition-mode, with these settings:

(when (aorst/font-installed-p "JetBrainsMono")
  (let ((ligatures `((?-  ,(regexp-opt '("-|" "-~" "---" "-<<" "-<" "--" "->" "->>" "-->")))
                     (?/  ,(regexp-opt '("/**" "/*" "///" "/=" "/==" "/>" "//")))
                     (?*  ,(regexp-opt '("*>" "***" "*/")))
                     (?<  ,(regexp-opt '("<-" "<<-" "<=>" "<=" "<|" "<||" "<|||" "<|>" "<:" "<>" "<-<"
                                           "<<<" "<==" "<<=" "<=<" "<==>" "<-|" "<<" "<~>" "<=|" "<~~" "<~"
                                           "<$>" "<$" "<+>" "<+" "</>" "</" "<*" "<*>" "<->" "<!--")))
                     (?:  ,(regexp-opt '(":>" ":<" ":::" "::" ":?" ":?>" ":=" "::=")))
                     (?=  ,(regexp-opt '("=>>" "==>" "=/=" "=!=" "=>" "===" "=:=" "==")))
                     (?!  ,(regexp-opt '("!==" "!!" "!=")))
                     (?>  ,(regexp-opt '(">]" ">:" ">>-" ">>=" ">=>" ">>>" ">-" ">=")))
                     (?&  ,(regexp-opt '("&&&" "&&")))
                     (?|  ,(regexp-opt '("|||>" "||>" "|>" "|]" "|}" "|=>" "|->" "|=" "||-" "|-" "||=" "||")))
                     (?.  ,(regexp-opt '(".." ".?" ".=" ".-" "..<" "...")))
                     (?+  ,(regexp-opt '("+++" "+>" "++")))
                     (?\[ ,(regexp-opt '("[||]" "[<" "[|")))
                     (?\{ ,(regexp-opt '("{|")))
                     (?\? ,(regexp-opt '("??" "?." "?=" "?:")))
                     (?#  ,(regexp-opt '("####" "###" "#[" "#{" "#=" "#!" "#:" "#_(" "#_" "#?" "#(" "##")))
                     (?\; ,(regexp-opt '(";;")))
                     (?_  ,(regexp-opt '("_|_" "__")))
                     (?\\ ,(regexp-opt '("\\" "\\/")))
                     (?~  ,(regexp-opt '("~~" "~~>" "~>" "~=" "~-" "~@")))
                     (?$  ,(regexp-opt '("$>")))
                     (?^  ,(regexp-opt '("^=")))
                     (?\] ,(regexp-opt '("]#"))))))
    (dolist (char-regexp ligatures)
      (apply (lambda (char regexp) (set-char-table-range
                                    composition-function-table
                                    char `([,regexp 0 font-shape-gstring])))
             char-regexp))))

You can see, that most ligatures work, but not all: [off] / [on] (you can toggle between tabs with images to see what changes and what not). Mainly, there are four missing ligatures: ~=, \, \/, and /**

Atom editor also has this issue:

I was unable to set up VSCode ligatures, as their interface is unfumiliar.

In Intellij Idea Community Edition ligatures partly work:

Again, no \, and \/

[philippnurullin]

Hi @andreyorst .
The /\ \/ was removed because of this issue #78 (comment)
The /** was removied beacuse of this #88
~= was removed after this request #204
In IDEA JetBrains Mono is bundled with an older version, so some ligature alterations is not applied.

We are currently working on page update. We will remove all the irrelevant ligatures. Thanks for the feedback!

[andreyorst]

Ah, okay!

Should I close this now, or you'll close it after page update?

[philippnurullin]

Worry not, i will close this when we update the page.

[philippnurullin]

The page was updated.