Function type_suffix

test/fixtures/wpt/resources/webidl2/lib/webidl2.js:1127–1133

* @param {import("../tokeniser.js").Tokeniser} tokeniser

(tokeniser, obj)

 * @param {import("../tokeniser.js").Tokeniser} tokeniser
 */
function type_suffix(tokeniser, obj) {
  const nullable = tokeniser.consume("?");
  if (nullable) {
    obj.tokens.nullable = nullable;
  }
  if (tokeniser.probe("?")) tokeniser.error("Can't nullable more than once");
}

/**
 * @param {import("../tokeniser.js").Tokeniser} tokeniser