Function isIdentifier

src/utils.ts:18–20

(s: any)

export const IDENTIFIER_REGEX = /^[a-zA-Z0-9_-]+$/;

export function isIdentifier(s: any): s is string {
  return typeof s === 'string' && IDENTIFIER_REGEX.test(s);
}

export function isPromise(a: any): a is Promise<any> {
  return a && typeof a === 'object' && typeof a.then === 'function';