Syntax Highlighting (VS Code)

Luma has an official Visual Studio Code extension that provides syntax highlighting, code snippets, and editor support for .luma and .lcore files.

Features

Feature	Status
Syntax highlighting	Available
Code snippets	Available (11 templates)
Bracket matching	Available
Auto-closing pairs	Available
Comment toggling	Available
Code folding	Available
Language Server (autocomplete, hover)	Planned
Debugging	Planned
Formatter	Planned

Installation

From VSIX file

Download the latest .vsix file from the Luma repository
Open VS Code
Open the Command Palette (Ctrl+Shift+P / Cmd+Shift+P)
Type “Install from VSIX” and select the command
Choose the downloaded .vsix file

From source (development)

cd luma-vscode-extension
npm install
npm run compile

Then press F5 in VS Code to launch the extension in a development host window.

What gets highlighted

The extension provides full TextMate grammar highlighting for all Luma syntax:

Keywords

Control flow: fn, if, else, return, walk
Declarations: struct, trait, impl, type, import, pub, lock

Built-in functions

Output: print, sprint
I/O: file, cli, glob
Type conversion: to_int, to_str, to_float, to_bool
Web: get, post, put, delete, text, html, json

Types

Primitives: int, float, bool, str, byte
Special: datetime, date, time, void, any, file, cli
Optional: ?int, ?str, etc.
Server: Request, Response, Route, ServerConfig

Literals and operators

Strings with ${} interpolation highlighting
Escape sequences: \n, \r, \t, \\, \", \$
Numbers (decimal and hexadecimal 0x...)
All operators: arithmetic, comparison, logical, range (.., ..=), arrow (->, =>)
Comments (single-line // and block /* */)

Code snippets

The extension includes snippets for common patterns. Type the prefix and press Tab:

Prefix	Expands to
`fn`	Function definition
`var`	Variable declaration
`if`	If/else block
`walk`	Walk loop
`struct`	Struct definition
`impl`	Implementation block
`trait`	Trait declaration
`import`	Import statement
`lock`	Immutable variable
`server`	Web server setup
`route`	Route definition
`handler`	HTTP handler function

File associations

The extension automatically activates for:

.luma files (Luma source code)
.lcore files (Luma core runtime functions)

Editor features

The language configuration enables:

Line comments with //
Block comments with /* ... */
Auto-closing of brackets {}, [], () and quotes "", ''
Auto-indentation after opening braces
Bracket pair highlighting
Code folding for block comments and brace-delimited blocks

Last updated on July 13, 2025

Language Server (planned)