Method plus

java/com/google/re2j/Compiler.java:163–165

(Frag f1, boolean nongreedy)

  // Given a fragment for a, returns a fragment for a+ or a+? (if nongreedy)
  private Frag plus(Frag f1, boolean nongreedy) {
    return new Frag(f1.i, loop(f1, nongreedy).out, f1.nullable);
  }

  // op is a bitmask of EMPTY_* flags.
  private Frag empty(int op) {