Getting line number where error occured?

[Jarrett Billingsley]

On Thu, Jan 15, 2009 at 8:50 PM, Sergey Gromov <snake.scaly at gmail.com> wrote:
>
> You're correct, I missed that.  Exception is derived from Throwable in
> druntime, and Throwable has a field 'info' of type TraceInfo with
> opApply in its interface.
>
> But it doesn't work, at least with DMD 2.023 on Windows.  Attempts to
> access this field cause object.Error: Access Violation.  I didn't try to
> investigate further though.

By default there is no mechanism to fill in this info, so it's null.
The "proper" usage would be something like:

if(ex.info)
    writefln("Traceback: %s", ex.info);

But again, there is no mechanism to fill this in, only the hooks to
make it possible to do so.

Team0xf has made a few traceback modules which work only with Tango on
Windows to fill in this info, but there's no reason it couldn't be
done on other platforms or with Phobos.