Class ParentRule

src/main/java/org/sfj/PegLegParser.java:109–132

  }

  public class ParentRule implements PegLegRule<V> {
    private final PegLegRule<V> rule;
    private Ref<?>[] refs = null;

    public ParentRule(PegLegRule<V> rule) {
      this.rule = rule;
    }

    public PegLegRule<V> refs(Ref<?>... refs) {
      this.refs = refs;
      return this;
    }

    @Override
    public RuleReturn<V> rule() {
      if (refs == null) { return rule.rule(); }
      for (Ref<?> r : refs) { r.enterRef(); }
      try {
        return rule.rule();
      } finally {
        for (Ref<?> r : refs) { r.exitRef(); }
      }
    }
  }

  public static class SourcePosition {
    int line = 1;