Strack traces with Exception::Class

[Arunbear]

Hello friends,

is there a way to configure Exception::Class so that Perl will show the full stracktrace without myself having to first catch the exception and then call the trace method?

i.e. I want $my_execpt->throw('error_msg') to have the same effect as confess('error_msg')

I need this behaviour because there are times when I want to raise an exception (e.g. subroutine called without a required parameter) but don't want to write a handler for it - and I still need the stracktrace.

Thanks for any assistance.

[hardburn]

I think it will work if use the Carp module and import verbose, e.g.:

use Carp 'verbose';

[Arunbear]

I've now tried using Carp with the verbose option, but it does not make Exception::Class's throw method give the strack trace.

[IlyaM]

From Exception::Class documentation:

       * Trace($boolean)
           Each "Exception::Class::Base" subclass can be set
           individually to include a a stracktrace when the
           "as_string" method is called.  The default is to not
           include a stacktrace.  Calling this method with a
           value changes this behavior.  It always returns the
           current value (after any change is applied).

           This value is inherited by any subclasses.  However,
           if this value is set for a subclass, it will there-
           after be independent of the value in "Excep-
           tion::Class::Base".

           This is a class method, not an object method.

I.e if you need stacktraces for exception class MyException (and its childs) you need to add

MyException->Trace(1);

Alternatively you can just redefine as_string() method to print uncaught exceptions as you wish.

[jffry]

Hopefully, this isn't too old to post to.

I just had to solve this problem myself. I wanted all exceptions to show stack traces all the time. Since Trace($boolean) is a class method, I just did this (see below) once, and it worked for all child/sub classes and their objects.

Exception::Class::Base->Trace(1);

I put that right after my use statement.