GraalVM: Run Programs Faster Anywhere(graalvm.org)

  @NodeInfo(shortName = "+")
  public abstract class SLAddNode extends SLBinaryNode {

      @Specialization(rewriteOn = ArithmeticException.class)
      protected long add(long left, long right) {
          return Math.addExact(left, right);
      }

      @Specialization
      @TruffleBoundary
      protected SLBigNumber add(SLBigNumber left, SLBigNumber right) {
          return new SLBigNumber(left.getValue().add(right.getValue()));
      }

      @Specialization(guards = "isString(left, right)")
      @TruffleBoundary
      protected String add(Object left, Object right) {
          return left.toString() + right.toString();
      }

      protected boolean isString(Object a, Object b) {
          return a instanceof String || b instanceof String;
      }
  }