Function isSubset

scripts/fungrim/compile-rules.ts:198–201

(a: ReadonlySet<string>, b: ReadonlySet<string>)

  return out;
}

function isSubset(a: ReadonlySet<string>, b: ReadonlySet<string>): boolean {
  for (const x of a) if (!b.has(x)) return false;
  return true;
}

/** The non-wildcard MathJSON payload(s) of a guard (for shell collection). */