Exemple #1
0
        public void ExitComparison(QueryParser.ComparisonContext context)
        {
            var opToken = context.REL_OP();

            if (opToken == null)
            {
                return;
            }

            var op    = opToken.Symbol;
            var right = _expressions.Pop();
            var left  = _expressions.Pop();

            BinaryOperatorExpression value = null;

            switch (op.Text)
            {
            case "<":
                value = new LessThanOperator(op.Line, op.Column, left, right);
                break;

            case "<=":
                value = new LessThanOrEqualOperator(op.Line, op.Column, left, right);
                break;

            case "<>":
            case "!=":
                value = new NotEqualOperator(op.Line, op.Column, left, right);
                break;

            case "==":
            case "=":
                value = new EqualOperator(op.Line, op.Column, left, right);
                break;

            case ">":
                value = new GreaterThanOperator(op.Line, op.Column, left, right);
                break;

            case ">=":
                value = new GreaterThanOrEqualOperator(op.Line, op.Column, left, right);
                break;
            }

            Trace.Assert(value != null, "Invalid comparison operator " + op.Text);

            _expressions.Push(value);
        }
Exemple #2
0
        public void CreateExpressionTest1()
        {
            // Arrange
            Expression parameterExpression = Expression.Parameter(typeof(Employee), "sample");
            Expression expressionProperty  = Expression.Property(parameterExpression, nameof(Employee.Age));
            Expression expressionConstant  = Expression.Constant(20);

            Expression expectedExpression = Expression.NotEqual(expressionProperty, expressionConstant);

            var _operator = new NotEqualOperator();

            // Act
            Expression resultExpression = _operator.CreateExpression(expressionProperty, expressionConstant);

            // Assert
            Assert.AreEqual(expectedExpression.ToString(), resultExpression.ToString(), "Expression not correct");
        }
Exemple #3
0
 public Bitmap Visit(NotEqualOperator expr)
 {
     return(ComputeFunction(expr));
 }