Method parseVerticalBar

java/com/google/re2j/Parser.java:1212–1222

()

  // parseVerticalBar handles a | in the input.
  private void parseVerticalBar() {
    concat();

    // The concatenation we just parsed is on top of the stack.
    // If it sits above an opVerticalBar, swap it below
    // (things below an opVerticalBar become an alternation).
    // Otherwise, push a new vertical bar.
    if (!swapVerticalBar()) {
      op(Regexp.Op.VERTICAL_BAR);
    }
  }

  // mergeCharClass makes dst = dst|src.
  // The caller must ensure that dst.Op >= src.Op,