FiraCode/README.md

Fira Code: monospaced font with programming ligatures

Download Fira Code v1.100

Problem

Programmers use a lot of symbols, often encoded with several characters. For human brain sequences like ->, <= or := are single logical token, even if they take two or three places on the screen. Your eye spends non-zero amount of energy to scan, parse and join multiple characters into a single logical one. Ideally, all programming languages should be designed with full-fledged Unicode symbols for operators, but that’s not the case yet.

Solution

Fira Code is a Fira Mono font extended with a set of ligatures for common programming multi-character combinations. This is just a font rendering feature: underlying code remains ASCII-compatible. This helps to read and understand code faster. For some frequent sequences like .. or // ligatures allow us to correct spacing.

Editor support

Do not work:

• SublimeText (vote here)
• Intellij Idea (vote here), including everything built on top of it (PhpStorm, PyCharm, RubyMine, WebStorm, AppCode, CLion, ReSharper)
• iTerm 2 (feature request)
• OS X Terminal.app
• Emacs (workaround)
• gVim, MacVim
• Eclipse (Mac and Win, vote here)
• Notepad++
• Kate, Konsole, KWrite in KDE 4
• Xamarin Studio/Monodevelop

Do work:

• Atom (since 1.1, add atom-text-editor { text-rendering:optimizeLegibility } to the stylesheet)
• Xcode (with this plugin)
• Visual Studio
• TextMate 2
• Coda 2
• Eclipse (Linux)
• QtCreator
• LightTable (instructions)
• BBEdit — enter this command in a terminal to enable ligatures:
  defaults write com.barebones.bbedit "EnableFontLigatures_Fira Code" -bool YES
• RStudio
• Chocolat
• Kate, Konsole, KWrite in Plasma/KDE 5
• Kate, Konsole, KWrite in KDE 4 using Debian Jessie or OS X
• Mancy
• TextAdept (Linux, Mac)
• GNOME Builder

Should work (copied from Hasklig README):

• Geany
• gEdit
• Smultron
• Vico

Browser support

• Firefox
• Safari
• Chromium-based browsers: enable with font-variant-ligatures: contextual; or text-rendering: optimizeLegibility (see 571246)

Code examples

Ruby:

JavaScript:

Erlang:

Go:

Haskell:

Alternatives

Another monospaced fonts with ligatures:

• Hasklig (free)
• PragmataPro (€59)
• Monoid (free)

Credits

This work is based on OFL-licensed Fira Mono font. Original Fira Mono font was not changed, only extended.

Fira Code was inspired by Hasklig font: Ligatures for Haskell code.

Thanks Georg Seifert for providing a Glyphs 2 license.

Changelog

1.100

• Fixed calt table conflicts (---- would incorrectly render as <!--)
• Added centered : (between digits, e.g. 10:40)
• Added lowercase-aligned -, * and + (only between lowercase letters, e.g. kebab case var-name, pointers *ptr etc)

1.000

Added weights:

• Retina (just slightly heavier than Regular)
• Medium
• Bold

Switched to calt instead of liga. You can now “step inside” the ligature in text editors.

Fira Code is now drawn and built in Glyps 2 app (should improve compatibility).

Added:

<-> <~~ <~ ~~~ ~> ~~>
<$ <+ <* *> +> $>
;;; ::: !!! ??? %% %%% ## ### ####
.- #_( =< **/ 0x www []

Redrawn:

{- -} ~= =~ =<< >>= <$> <=> .=

Removed: ?:

Total ligatures count: 115

0.6

Redrawn from Fira Mono 3.204 (slightly heavier weight)

Added:

** *** +++ -- --- ?:
/= /== .= ^= =~ ?= ||= |=
<<< <=< -<< -< >- >>- >=> >>>
<*> <|> <$> <+>
<!-- {- -} /** \\ \\\ ..< ?? ||| &&& <| |>

Added support for Powerline

0.5

Added: #{ ~- -~ <== ==> /// ;; </

0.4

• Added ~= ~~ #[
• Rolled back && and || to more traditional look
• === and !== are now rendered with 3 horisontal bars

0.3

Added: ~@ #? =:= =<

0.2.1

Fixed width of && and ||

0.2

Added: --> <-- && || =>> =/=

0.1

>>= =<< <<= ->> -> => <<- <-
=== == <=> >= <= >> << !== != <>
:= ++ #( #_
:: ... .. !! // /* */ />