Use ligatures instead of prettify-symbols

configuration.org

@@ -128,6 +128,80 @@
   (trailing-whitespace ((t (:inherit nil :background "red3")))))
 #+end_src
 
+** Use ligatures
+
+#+begin_src emacs-lisp
+(use-package ligature
+  :config
+  ;; Enable the "www" ligature in every possible major mode
+  (ligature-set-ligatures 't '("www"))
+  ;; Enable traditional ligature support in eww-mode, if the
+  ;; `variable-pitch' face supports it
+  (ligature-set-ligatures 'eww-mode '("ff" "fi" "ffi"))
+  ;; Enable all Cascadia and Fira Code ligatures in programming modes
+  (ligature-set-ligatures 'prog-mode
+                          '(;; == === ==== => =| =>>=>=|=>==>> ==< =/=//=// =~
+                            ;; =:= =!=
+                            ("=" (rx (+ (or ">" "<" "|" "/" "~" ":" "!" "="))))
+                            ;; ;; ;;;
+                            (";" (rx (+ ";")))
+                            ;; && &&&
+                            ("&" (rx (+ "&")))
+                            ;; !! !!! !. !: !!. != !== !~
+                            ("!" (rx (+ (or "=" "!" "\." ":" "~"))))
+                            ;; ?? ??? ?:  ?=  ?.
+                            ("?" (rx (or ":" "=" "\." (+ "?"))))
+                            ;; %% %%%
+                            ("%" (rx (+ "%")))
+                            ;; |> ||> |||> ||||> |] |} || ||| |-> ||-||
+                            ;; |->>-||-<<-| |- |== ||=||
+                            ;; |==>>==<<==<=>==//==/=!==:===>
+                            ("|" (rx (+ (or ">" "<" "|" "/" ":" "!" "}" "\]"
+                                            "-" "=" ))))
+                            ;; \\ \\\ \/
+                            ("\\" (rx (or "/" (+ "\\"))))
+                            ;; ++ +++ ++++ +>
+                            ("+" (rx (or ">" (+ "+"))))
+                            ;; :: ::: :::: :> :< := :// ::=
+                            (":" (rx (or ">" "<" "=" "//" ":=" (+ ":"))))
+                            ;; // /// //// /\ /* /> /===:===!=//===>>==>==/
+                            ("/" (rx (+ (or ">"  "<" "|" "/" "\\" "\*" ":" "!"
+                                            "="))))
+                            ;; .. ... .... .= .- .? ..= ..<
+                            ("\." (rx (or "=" "-" "\?" "\.=" "\.<" (+ "\."))))
+                            ;; -- --- ---- -~ -> ->> -| -|->-->>->--<<-|
+                            ("-" (rx (+ (or ">" "<" "|" "~" "-"))))
+                            ;; *> */ *)  ** *** ****
+                            ("*" (rx (or ">" "/" ")" (+ "*"))))
+                            ;; www wwww
+                            ("w" (rx (+ "w")))
+                            ;; <> <!-- <|> <: <~ <~> <~~ <+ <* <$ </  <+> <*>
+                            ;; <$> </> <|  <||  <||| <|||| <- <-| <-<<-|-> <->>
+                            ;; <<-> <= <=> <<==<<==>=|=>==/==//=!==:=>
+                            ;; << <<< <<<<
+                            ("<" (rx (+ (or "\+" "\*" "\$" "<" ">" ":" "~"  "!"
+                                            "-"  "/" "|" "="))))
+                            ;; >: >- >>- >--|-> >>-|-> >= >== >>== >=|=:=>>
+                            ;; >> >>> >>>>
+                            (">" (rx (+ (or ">" "<" "|" "/" ":" "=" "-"))))
+                            ;; #: #= #! #( #? #[ #{ #_ #_( ## ### #####
+                            ("#" (rx (or ":" "=" "!" "(" "\?" "\[" "{" "_(" "_"
+					 (+ "#"))))
+                            ;; ~~ ~~~ ~= ~-  ~@ ~> ~~>
+                            ("~" (rx (or ">" "=" "-" "@" "~>" (+ "~"))))
+                            ;; __ ___ ____ _|_ __|____|_
+                            ("_" (rx (+ (or "_" "|"))))
+                            ;; Fira code: 0xFF 0x12
+                            ("0" (rx (and "x" (+ (in "A-F" "a-f" "0-9")))))
+                            ;; Fira code:
+                            "Fl"  "Tl"  "fi"  "fj"  "fl"  "ft"
+                            ;; The few not covered by the regexps.
+                            "{|"  "[|"  "]#"  "(*"  "}#"  "$>"  "^="))
+  ;; Enables ligature checks globally in all buffers. You can also do it
+  ;; per mode with `ligature-mode'.
+  (global-ligature-mode t))
+#+end_src
+
 ** Set up my personal keymap
 
 I set it up early so i can use it in ~use-package~ calls immediately.
@@ -1336,9 +1410,9 @@ If ENABLE is set, explicitly enable dark mode despite the current setting."
 
 Because we can.
 
-#+BEGIN_SRC emacs-lisp
+#+begin_src emacs-lisp
 (global-prettify-symbols-mode t)
-#+END_SRC
+#+end_src
 
 And set up all the pretty symbols.
 
@@ -1346,14 +1420,10 @@ And set up all the pretty symbols.
 (setq prettify-symbols-alist
       '(("lambda" . ?λ)
         ("function" . ?ƒ)
-        ("->" . ?→)
-        ("=>" . ?⇒)
         ("map" . ?↦)
         ("not" . ?¬)
         ("and" . ?∧)
-        ("or" . ?∨)
+        ("or" . ?∨)))
-        ("<=" . ?≤)
-        (">=" . ?≥)))
 #+END_SRC
 
 Finally, set the frame title to the current file name