Method Group

classpath/java/util/regex/Compiler.java:196–201

(boolean capturing, ArrayList<Expression> initialList)

    private ArrayList<Group> alternatives;

    public Group(boolean capturing, ArrayList<Expression> initialList) {
      this.capturing = capturing;
      if (initialList != null) {
        list.addAll(initialList);
      }
    }

    public void push(Expression expr) {
      list.add(expr);