Function check

packages/check/match.js:20–44

(value, pattern)

 * @param {MatchPattern} pattern The pattern to match `value` against
 */
export function check(value, pattern) {
  // Record that check got called, if somebody cared.
  //
  // We use getOrNullIfOutsideFiber so that it's OK to call check()
  // from non-Fiber server contexts; the downside is that if you forget to
  // bindEnvironment on some random callback in your method/publisher,
  // it might not find the argumentChecker and you'll get an error about
  // not checking an argument that it looks like you're checking (instead
  // of just getting a "Node code must run in a Fiber" error).
  const argChecker = currentArgumentChecker.getOrNullIfOutsideFiber();
  if (argChecker) {
    argChecker.checking(value);
  }

  const result = testSubtree(value, pattern);
  if (result) {
    const err = new Match.Error(result.message);
    if (result.path) {
      err.message += ` in field ${result.path}`;
      err.path = result.path;
    }

    throw err;
  }
};

/**
 * @namespace Match