Function parseArith

book/tiny-ts-parser.ts:1063–1069

(code: string)

}

export function parseArith(code: string): TermForArith {
  return subsetSystem(
    parse(code),
    ["Boolean", "Number"],
    ["true", "false", "if", "number", "add"],
  );
}

export function parseBasic(code: string): TermForBasic {
  return subsetSystem(