const SPECIAL_CHARS = /[-\/\\^$*+?.()|[\]{}]/g;
const ESCAPED_CHAR = "\\$&";

const escapeRegExp = (s: string) => s.replace(SPECIAL_CHARS, ESCAPED_CHAR);

const regexp = (flags?: string) =>
  (strings: string[], ...values: string[]) =>
    new RegExp(strings[0] + values.map((value, index) => escapeRegExp(value) + strings[index + 1]).join(""), flags);