Wyn for VS Code

Syntax highlighting and language server support for Wyn.

Features

Syntax highlighting - keywords, built-in modules, types, operators, string interpolation, comments
LSP via wyn lsp - live diagnostics (type-check only, never runs your code), completions, hover, go-to-definition, find references, rename
Auto-closing brackets, quotes, string interpolation ${}
Comment toggling (Ctrl+/), code folding
Filetype detection for .wyn and .🐉

Install

From source

git clone https://github.com/wynlang/vscode-wyn.git
cd vscode-wyn
npm install
npm run compile

Then symlink (or copy) into your extensions dir and restart VS Code:

# macOS/Linux
ln -s "$PWD" ~/.vscode/extensions/wyn
# Windows
xcopy /E . %USERPROFILE%\.vscode\extensions\wyn

Open any .wyn file. Syntax highlighting works immediately; the LSP starts automatically if wyn is on your PATH (install with wyn install, or set wyn.lsp.path).

LSP

The extension starts wyn lsp when you open a .wyn file. It provides:

Diagnostics - errors/warnings from wyn check as you type (type-check only; never runs your program)
Completions - keywords, modules, and symbols (triggered by . / :)
Hover - symbol info
Go to Definition - jump to function/struct/enum declarations
Find References / Rename - across the open files

Settings: wyn.lsp.enabled (default true), wyn.lsp.path (default "wyn").

Highlighted

Category	Tokens
Keywords	`fn var const struct enum impl trait type pub import export from as extern`
Flow	`return break continue spawn await await_all parallel select if else match while for in`
Operators	`and or not`
Modifiers	`mut`
Types	`int float string bool void ptr char Option Result HashMap`
Modules	`File System Terminal HashMap Math Path DateTime Json Regex Csv Http Net Db Task Gui Audio StringBuilder Crypto Encoding Os Uuid Log Process Test Url`
Constants	`true false None Some Ok Err`

Example

struct Server {
    port: int
    name: string

    fn start(self) -> int {
        var srv = Http.serve(self.port)
        println("${self.name} running on ${self.port.to_string()}")
        return srv
    }
}

fn main() -> int {
    var s = Server{port: 8080, name: "MyApp"}
    s.start()
    return 0
}

Wyn - The Wyn Programming Language

wynlang