TOML+ for VS Code

Language support for TOML+, a config language: TOML with block dictionaries, annotations, and variables.

[vars]
base_url = "https://api.example.com"

[server]
@type: int
@min: 1
@max: 65535
port = $ENV.PORT ?? 8080

cors = #{
    @required
    access-control-allow-origin = $base_url
}#

Features

Syntax highlighting — sections, block dicts, annotations, variables, every numeric literal form.
Live diagnostics — parse errors and annotation-driven validation (@required, @type, @min/max, @enum, @pattern, @deprecated, etc.) update as you type.
Hover — show a key's resolved value + type + every annotation + any @tag metadata. On a $variable, show its [vars] definition or the resolved env-var value.
Completion — snippet-driven for @annotations and $variables, with per-item documentation.
Inlay hints — → "resolved" next to $ENV.X and $user_var references, : int next to @type:-annotated keys.
Goto definition — Ctrl+Click a $var jumps to its [vars] entry.
Document symbols — outline view with nested sections.
Format — round-trip the file through the dumper.
Color provider — #FF8800 strings get a clickable swatch.
Semantic tokens — 11 token types so your theme can colour annotations, variables, sections distinctly.

Requirements

Needs the tomlplus-lsp binary on your PATH (or set tomlplus.serverPath in your VS Code settings).

cargo install tomlplus-lsp
# or download from https://github.com/CarsonKopec/tomlplus/releases

Extension settings

Setting	Default	Purpose
`tomlplus.serverPath`	`tomlplus-lsp`	Path to the language server binary. Set to an absolute path if it isn't on PATH.

Release notes

See CHANGELOG.md.

License

MIT

TOML+