AjErl.Expressions.TupleExpression.HasVariable C# (CSharp) Method

        public bool HasVariable()
        {
            foreach (var expr in this.expressions)
                if (expr.HasVariable())
                    return true;

            return false;
        }

        public void CreateEmptyTuple()
        {
            var expr = new TupleExpression(new IExpression[] { });

            Assert.IsFalse(expr.HasVariable());

            var result = expr.Evaluate(null);

            Assert.IsNotNull(result);
            Assert.IsInstanceOfType(result, typeof(Tuple));

            var tuple = (Tuple)result;

            Assert.AreEqual(0, tuple.Arity);
        }