public void Or()
{
var right = _expressions.Pop();
var left = _expressions.Pop();
if (right.IsNull || left.IsNull) {
_expressions.Push(NullIndexExpression.Instance);
return;
}
var and = new AndIndexExpression(left, right);
_expressions.Push(and);
}
public void And()
{
if (_expressions.Count <= 1)
throw ExpressionTreeParseException.InvalidExpressionCount("And");
var right = _expressions.Pop();
var left = _expressions.Pop();
if (right.IsNull) {
_expressions.Push(left);
return;
}
if (left.IsNull) {
_expressions.Push(right);
return;
}
var and = new AndIndexExpression(left, right);
_expressions.Push(and);
}