Function parseBoolean

http/unstable_structured_fields.ts:992–1012

(state: ParserState)

}

function parseBoolean(state: ParserState): BareItem {
  if (consume(state) !== "?") {
    throw new SyntaxError(
      `Invalid structured field: expected '?' at position ${state.pos - 1}`,
    );
  }

  const c = consume(state);
  if (c === "1") {
    return { type: "boolean", value: true };
  }
  if (c === "0") {
    return { type: "boolean", value: false };
  }

  throw new SyntaxError(
    `Invalid structured field: expected '0' or '1' at position ${
      state.pos - 1
    }`,
  );
}

function parseDate(state: ParserState): BareItem {
  if (consume(state) !== "@") {