BQN language support for Zed

Prerequisites

BQN LSP should be installed in your $PATH as BQNLSP!

This uses

• bqnlsp
• tree-sitter-bqn

Decisions

The syntax highlighting choices I've made.

• Function glyphs are highlighted as operators, leaving function highlighting for user written functions.
• 1- and 2-modifiers use type highlighting (since BQN doesn't specify types).
• { } : ; ← ↩ ⇐ (𝕊 in headers) are highlighted as keywords to make them stand as controllflow primitives.
• In contrast with 𝕊, 𝕩 𝕨 𝔽 𝔾 𝕤 _𝕣 _𝕣_ keep their syntactic coloring in headers for readibility reasons.

Features

• Syntax highlighting.
• Outline support.
• Runnable blocks.
  • When you write a nameless block, a run button will apear next to it.
  • You need bqn in your path in order to use this.
• Hover documentation (powered by the lsp).

Gripes

• Sadly system functions • aren't deconstructed in the tree-sitter grammar, that is why I can't do the . seperated notation highlighting.
• The lsp, while very nice, could use features like goto definition or refactoring tools.
• The LSP should download automatically. Now that needs to happen manually.
• Hover documentation doesn't always seem to work.

Making Zed BQN friendly

Install the BQN font And add it in your settings "buffer_font_family": "BQN386 Unicode",

These tasks might be nice to have

{
  "label": "BQN run file",
  "command": "bqn -f '$ZED_FILE'"
},
{
  "label": "BQN run line",
  "command": "cat './${ZED_RELATIVE_FILE}' | head -n $ZED_ROW | tail -n 1 | bqn -p",
},
{
  "label": "BQN run $ZED_SELECTED_TEXT",
  "command": "bqn -p '$ZED_SELECTED_TEXT'",
}

You can ofcourse also write a task for running your specific project.

If you use option/alt as your BQN modifier key, reclaim the keys in your keymap.json:

[
  {
    "context": "Editor",
    "bindings": {
      "alt-h": null,
      "alt-d": null,
      "alt-b": null,
      "alt-f": null,
      "alt-shift-b": null,
      "alt-shift-f": null,
      "alt-v": null,
      "alt-shift-t": null
    }
  },
  {
    "context": "Workspace",
    "bindings": {
      "alt-t": null,
      "alt-shift-t": null
    }
  },
  {
    "context": "Editor && mode == full",
    "bindings": {
      "alt-z": null
    }
  }
]