Adding more information to exceptions

[Vladimir Panteleev]

On Tuesday, 29 January 2013 at 20:37:07 UTC, Andrej Mitrovic 
wrote:
> 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;
> }

Ah, that's clever... thanks!