Function fail

scripts/add-lang/check-grammar.mjs:23–23

(code, msg)

const require = createRequire(import.meta.url);
const fail = (code, msg) => { console.error(`[check-grammar] ${msg}`); process.exit(code); };

const [token, sample, iterArg] = process.argv.slice(2);
if (!token || !sample) fail(2, 'usage: check-grammar.mjs <lang|wasm-path> <valid-sample> [iterations]');