protected override Expression VisitUnaryOperator(UnaryOperatorBindingParserNode node)
{
var operand = Visit(node.InnerExpression);
ExpressionType eop;
switch (node.Operator)
{
case BindingTokenType.AddOperator:
eop = ExpressionType.UnaryPlus;
break;
case BindingTokenType.SubtractOperator:
eop = ExpressionType.Negate;
break;
case BindingTokenType.NotOperator:
eop = ExpressionType.Not;
break;
default:
throw new NotSupportedException($"unary operator { node.Operator } is not supported");
}
return(ExpressionHelper.GetUnaryOperator(operand, eop));
}
private static void CheckUnaryOperatorNodeType <TInnerExpression>(UnaryOperatorBindingParserNode node, BindingTokenType operatorType)
where TInnerExpression : BindingParserNode
{
Assert.IsTrue(node.Operator == operatorType);
Assert.IsTrue(node.InnerExpression is TInnerExpression);
}
private static void CheckUnaryOperatorNodeType <TInnerExpression>(UnaryOperatorBindingParserNode node, BindingTokenType operatorType)
where TInnerExpression : BindingParserNode
{
Assert.AreEqual(operatorType, node.Operator);
Assert.IsInstanceOfType(node.InnerExpression, typeof(TInnerExpression));
}