Re: [Caml-list] ANN: exn-source - exception backtraces with source code printing

[Nicolas Boulay <nicolas@boulay.name>]

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Very nive project !

May a suggest a different result presentation ? Most of the time, only name
of the function called are usefull, its more compact than 5 lines arround
the call site.

One other very important feature will be the parameter value of the
function call. It's value could be serialised on fixe size (<20 characters
by default). On a tricky bug, the next step is to print such value, so you
save time to print it with the function call.

2014-10-19 20:03 GMT+02:00 John Whitington <john@coherentgraphics.co.uk>:

> Hi,
>
> OCaml 4.02 has new facilities for installing a new backtrace handler, and
> processing the back trace symbolically. As a little proof of concept, I've
> built a package which you can add to any project to get backtrace with
> source code printed and highlighted:
>
> https://github.com/johnwhitington/exn-source
>
> Here's the start of a backtrace:
>
> http://www.coherentpdf.com/exnsource.png
>
> By default, it prints five lines either side, and looks the current
> directory for source code. But as one can see from the screenshot, one can
> add /usr/local/lib/ocaml to get stdlib source and so on...
>
> It's somewhat difficult to test this kind of thing (we can't use
> exceptions at all inside a backtrace handler, for example), so I'm
> appealing for help. Attach exn-source to your code and let me know how you
> get on...
>
> Thanks,
>
> --
> John Whitington
> Director, Coherent Graphics Ltd
> http://www.coherentpdf.com/
>
>
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