Adding more information to exceptions

[Andrej Mitrovic]

On 1/29/13, Vladimir Panteleev <vladimir at thecybershadow.net> wrote:
> foreach (lineNumber, line; lines)
>     try
>        numbers ~= to!int(line);
>     catch (Exception e)
>        throw new Exception(format("Error on line %d: %s",
> lineNumber, e.msg));
>
> Of course, this has the problem that all information (except the
> message) from the original exception is lost.

What I'd do is:

catch (Exception e)
{
    e.msg = format("My info here...\n%s", e.msg);
    throw e;
}