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Hasklig - a code font with monospaced ligatures
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README.md

N.B. This is a fork of the Source Code Pro repository

Hasklig - Ligatures for Haskell code

Programming languages are limited to relatively few characters. As a result of a limited character set, combined character operators surfaced quite early, such as the widely used arrow (->), comprised of a hyphen and greater sign. It looks like an arrow if you know the analogy and squint a bit.

Composite glyphs become especially problematic in languages such as Haskell which utilize these complicated operators (<-, ::, =>, -<, >>= etc.) extensively (over 100 in lens alone!). Prettified code improves readability considerably - some Haskell programmers have even resorted to unicode symbols (ie. ⇒, ← etc.). This opens a whole new can of worms. In addition to encoding/compatibility problems and all the reasons it never worked out in APL, these symbols are one-character-wide and therefore eye-strainingly small.

Hasklig solves this problem the way typographers have always solved ill-fitting characters which co-occur often: ligatures. The underlying code stays the same — only the representation changes.

Download

Hasklig

Hasklig Sample

Source Code Pro

Source Code Pro Sample

Support

Let me know how your editor is supported.

Editors and terminals with known ligature support

  • Leksah
  • TextEdit
  • Atom (add text-rendering: optimizeLegibility; to your .editor css.)
  • Chocolat
  • Kate
  • KWrite
  • gEdit
  • Konsole

No ligature support

  • iTerm2
  • Terminal (OSX)
  • Sublime Text (Vote for the enhancement here)
  • MacVim

To Do

  1. Glyph substitution for \ → λ and . → ∘
  2. Terminal support (for example iTerm2)