public void TestPolymorphicReorder()
        {
            interpreter = reorderInterpreter;
            var factory   = ReorderWrapper.GetFactory(StrictInstruction.factory);
            var addInt    = factory.Binary((int a, int b) => a + b);
            var addFloat  = factory.Binary((float a, float b) => a + b);
            var addString = factory.Binary((string a, string b) => a + b);

            var addPoly
                = new PolymorphicInstruction(new [] { addInt, addFloat, addString })
                {
                tryBestFit = true
                };

            interpreter.AddInstruction("+", addPoly);
            Assert.Equal("[[] 1.1 5]", Run("[[3 1.1 2 +]]"));
            Assert.Equal("[[] 1.1 2]", Run("[[1.1 2 +]]"));
            Assert.Equal(@"[[] 2 1.1 ""hi there""]", Run(@"[[""hi "" 1.1 2 ""there"" +]]"));
            Assert.Equal(@"[[] sym 2 1.1 ""hi there""]", Run(@"[[""hi "" 1.1 2 ""there"" sym +]]"));
        }
 public NonstrictInterpreter()
 {
     this.instructionFactory
              = ReorderWrapper.GetFactory(StrictInstruction.factory);
     isStrict = false;
 }