Method star

java/com/google/re2j/Compiler.java:155–160

(Frag f1, boolean nongreedy)

  // Given a fragment a, returns a fragment for a* or a*? (if nongreedy)
  private Frag star(Frag f1, boolean nongreedy) {
    if (f1.nullable) {
      return quest(plus(f1, nongreedy), nongreedy);
    }
    return loop(f1, nongreedy);
  }

  // Given a fragment for a, returns a fragment for a+ or a+? (if nongreedy)
  private Frag plus(Frag f1, boolean nongreedy) {