/// <summary>Compile query to sort the table by the index.</summary>
public static SortQuery <tRow> sort <tRow, tKey>(iTypeSerializer ser, Expression <Func <tRow, tKey> > exp, bool descending) where tRow : new()
{
var me = exp.Body as MemberExpression;
if (null == me)
{
throw new NotSupportedException("Currently, orderBy[Descending] only supports ordering by a single column.");
}
IndexForColumn[] indices = ser.indicesFromColumn(me.Member);
bool indexDirectionPositive, multi;
string ind = ser.sortIndex(me.Member, out indexDirectionPositive, out multi);
bool shouldInvert = descending ^ (!indexDirectionPositive);
return(new SortQuery <tRow>(r => r.filterSort(ind, shouldInvert), multi));
}
