CardBoardException

auto e = new CardBoardException("Transmogrification failed");
try
{
    throw e;
}
catch (CardBoardException e)
{
    test!("==")(e.message(), "Transmogrification failed"[]);
    test!("==")(e.file, __FILE__[]);
    test!("==")(e.line, __LINE__ - 9);
}