[erlang-questions] try .. of .. catch question

[Jeroen Koops]

Hi Dave,

The two blocks are different. In the first block, if an exception occurs
anywhere between the 'case' and the 'end', it will be caught by the
catch-clause. But in the second block, only exceptions occurring when
evaluating foo() will be caught; exceptions occuring while evaluating 'a' or
'b' won't.

Regards,

Jeroen



On Wed, Feb 9, 2011 at 12:22 PM, Dave Challis <dsc@REDACTED> wrote:

> Hi,
> I'm just learning about exceptions in Erlang, and just curious as to the
> use of try..of..catch - is it just a shortcut to combining a case with a
> try/catch?
>
> For example, are the two blocks of code below identical? Or is there some
> subtle difference I've missed?
>
> try
>    case foo() of
>        true  -> a;
>        false -> b
>    end
> catch
>    Error:Reason -> {Error, Reason}
> end
>
>
> try
>    foo()
> of
>    true  -> a;
>    false -> b
> catch
>    Error:Reason -> {Error, Reason}
> end
>
> Thanks,
> --
> Dave Challis
> dsc@REDACTED
>
> ________________________________________________________________
> erlang-questions (at) erlang.org mailing list.
> See http://www.erlang.org/faq.html
> To unsubscribe; mailto:erlang-questions-unsubscribe@REDACTED
>
>