YO Language — VS Code Extension
Syntax highlighting, snippets, and a Run command for the YO programming language.
✨ Features
🎨 Syntax Highlighting
Full TextMate grammar for .yo files:
| Element |
Color |
Example |
| Keywords |
purple |
make, task, when, else, repeat, for each, say, return |
| Strings |
green |
"Hello, World!" |
| Numbers |
blue |
42, 3.14 |
| Comments |
gray |
# this is a comment |
| Booleans |
orange |
true, false, null |
| Operators |
cyan |
==, !=, +, -, *, / |
| Stdlib calls |
blue |
math.round(), text.upper(), list.sort() |
📝 Snippets
Type a prefix and press Tab to expand:
| Prefix |
Expands to |
task |
Full function template with params and return |
make |
Variable declaration |
when |
Condition block |
whenelse |
Condition with else branch |
repeat |
Repeat N times loop |
foreach |
For each loop over a list |
say |
Print statement |
use |
Library import (math/text/list) |
ask |
User input |
list |
List declaration |
▶️ Run YO File
- Command:
YO: Run YO File
- Keybinding:
Ctrl+Shift+R (Windows/Linux) / Cmd+Shift+R (Mac)
- Play button: Appears in the editor title bar for
.yo files
The command saves the current file, opens an integrated terminal, and runs:
yo run filename.yo
📦 Installation
From Source (Development)
- Clone or copy the
yo-lang-vscode/ directory
- Open it in VS Code
- Press
F5 to launch the Extension Development Host
- Open any
.yo file to see syntax highlighting
Package as VSIX
npm install -g @vscode/vsce
cd yo-lang-vscode
vsce package
Then install the generated .vsix file via:
Extensions → ⋯ → Install from VSIX...
🔧 Requirements
- VS Code 1.75 or later
- YO interpreter installed and available on PATH (
pip install yo-lang)
📁 Extension Structure
yo-lang-vscode/
├── package.json # Extension manifest
├── extension.js # Run command logic
├── language-configuration.json # Brackets, comments, indentation
├── syntaxes/
│ └── yo.tmLanguage.json # TextMate grammar
├── snippets/
│ └── yo.snippets.json # Code snippets
└── README.md # This file
📄 License
MIT — see the yo-lang repository for details.
