Wax for Visual Studio Code
Syntax highlighting, formatting, diagnostics, and snippets for
Wax (a Rust-like syntax for WebAssembly) in
.wax files and for WebAssembly text (.wat) files.
Features
- Formatting with the Wax formatter itself, compiled to WebAssembly and run
in-process, so it works the same in desktop and web VS Code with no separate
install. Run "Format Document", or turn on "Format on Save"
(
editor.formatOnSave). Files with syntax errors are left untouched.
- Diagnostics as you type: syntax errors, type errors, and lints from the
same toolchain are shown inline (squiggles) and in the Problems panel.
- Convert / preview: "Wax: Show compiled WAT" (in a
.wax file) opens the
compiled WebAssembly text in a read-only document beside the source, updating
live as you edit; "Wax: Show as Wax" does the reverse from a .wat file. Both
are on the editor toolbar and in the command palette.
- WebAssembly text (
.wat): the same features apply to .wat files too:
formatting, diagnostics, document outline, syntax highlighting, snippets, and
comment/bracket handling, all from the same in-process toolchain and grammar.
- Syntax highlighting via a TextMate grammar covering the full language:
keywords and control flow (
fn, let, do, loop, match, dispatch,
try/catch, the br* branch family, stack-switching, …), primitive and
abstract heap types, references, numeric/char/string literals with escapes,
labels ('label), attributes (#[export = …], #[if(…)], #[likely], …),
aggregate literals ({point| …}, [bytes| …]), qualified intrinsics
(v128::const_i32x4, i64::add128), and method-style intrinsics.
- Language configuration: line/block comments, bracket matching and
colorization, auto-closing pairs, and indentation rules. Single quotes are
intentionally not auto-closed, because they introduce labels.
- Snippets for common constructs (functions, imports/exports, control flow,
types, tags, memories).
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