Class Frag

java/com/google/re2j/Compiler.java:24–46

A fragment of a compiled regular expression program. @see http://swtch.com/~rsc/regexp/regexp1.html

   * @see http://swtch.com/~rsc/regexp/regexp1.html
   */
  private static class Frag {
    final int i; // an instruction address (pc).
    int out; // a patch list; see explanation in Prog.java
    boolean nullable; // whether the fragment can match the empty string

    Frag() {
      this(0, 0);
    }

    Frag(int i) {
      this(i, 0);
    }

    Frag(int i, int out) {
      this(i, out, false);
    }

    Frag(int i, int out, boolean nullable) {
      this.i = i;
      this.out = out;
      this.nullable = nullable;
    }
  }

  private final Prog prog = new Prog(); // Program being built