protected override SqlExpression VisitUnary(UnaryExpression expression)
{
var operand = Visit(expression.Operand);
if (expression.Method != null)
{
return(CompileMember(expression.Method, null, operand));
}
switch (expression.NodeType)
{
case ExpressionType.ArrayLength:
if (expression.Operand.Type != typeof(byte[]))
{
throw new NotSupportedException(string.Format(Strings.ExTypeXIsNotSupported, expression.Operand.Type));
}
return(SqlDml.Cast(SqlDml.BinaryLength(operand), driver.MapValueType(typeof(int))));
case ExpressionType.Negate:
case ExpressionType.NegateChecked:
return(SqlDml.Negate(operand));
case ExpressionType.UnaryPlus:
return(operand);
case ExpressionType.Not:
return(IsBooleanExpression(expression.Operand)
? SqlDml.Not(operand)
: SqlDml.BitNot(operand));
case ExpressionType.Convert:
case ExpressionType.ConvertChecked:
return(VisitCast(expression, operand));
}
return(operand);
}
public static SqlExpression ByteArrayLength(SqlExpression _this)
{
return(SqlDml.BinaryLength(_this));
}