Vela for Visual Studio Code
Language support for Vela — a small statically-typed
language and its compiler (lexer, parser, type checker, tree-walking interpreter).
What you get
- File icons for
.vela files, in both light and dark themes.
- Syntax highlighting for keywords, types, literals, operators, numbers, strings and comments.
- Bracket matching and auto-closing for
() and {}.
- Comment toggling with
// and /* */.
This extension is purely declarative — it contains no code, no build step and no
dependencies. Everything is contributed through the manifest.
Install
From the Marketplace — search for Vela by Mainak in VS Code's Extensions view, or:
code --install-extension mainakkundu.vela-language
The listing is not called plain Vela because display names are unique across the
whole Marketplace, and an unrelated extension already holds that one. The
extension id is still vela-language, so the install command above never changes.
To install a local build instead, including one made from uncommitted changes:
cd editors/vscode
npx @vscode/vsce@4 package
code --install-extension vela-language-*.vsix
Language reference
| Category |
Tokens |
| Declarations |
let, const, fn, struct |
| Control flow |
if, else, while, for, break, continue, return |
| Builtins |
print, tostring, tonumber, typeOf, len, trunc, floor, ceil, round, abs, min, max, idiv, read, upper, lower, trim, startsWith, endsWith, indexOf, substr, repeat, replace, append |
| Types |
number, string, bool, void, function |
| Literals |
true, false, null |
| Operators |
+ - * / % ! = == != < <= > >= && \|\| ++ -- += -= *= /= %= -> ? |
| Punctuation |
( ) { } [ ] , ; : |
| Comments |
//, /* */ (not nestable) |
| Numbers |
123, 1_000_000, 3.14, 1.5e-3 |
? is the nullable suffix on a type — number?, Node?, number?[] — not a
ternary, and Vela has no ?. or ??. It also marks an optional struct field when
it follows the field's name — label?: string — so the same character is
highlighted in both positions.
[ and ] are array brackets: a literal [1, 2], a type number[], or an index
xs[0]. They highlight, but the extension does not auto-close them: [ opens on
both of the first two, and auto-closing an index would fight the type bracket.
License
MIT. See LICENSE.
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