Re: Difference Between use warnings and use warnings FATAL => 'all' (debugging)

> What's the rationale for using the latter instead of the former?

I'm surprised nobody mentioned till now, but personally, I use it from time to time for debugging.

If warnings get messy, it's easier to handle them one by one. (not necessarily => all warnings)

YMMV =)

Cheers Rolf

( addicted to the Perl Programming Language)

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Re^2: Difference Between use warnings and use warnings FATAL => 'all' (debugging) by GotToBTru (Prior) on Dec 30, 2013 at 14:48 UTC
For debugging purposes, I was very happy to learn the following: `$SIG{__WARN__} = sub { print $_[0]; $DB::single = 1 };` [download] I was annoyed to notice that warning messages did not appear as I was running code in the debugger. That might be fixable; I have never looked into it. This statement is now included in just about any program I write of any length. Not only does it give me the message but stops the debugger at the point of warning. I comment out the line when not running in the debugger because it generates a warning message. What irony.	[reply] [d/l]
Re^3: Difference Between use warnings and use warnings FATAL => 'all' (debugging) by LanX (Saint) on Dec 30, 2013 at 15:33 UTC
Thanks, personally I rarely use the debugger for debugging, at least not with code I wrote. :) To see warnings with `perl -d` you could try using it from an IDE like emacs to separate output frame from debugging GUI. update First I have to say that I don't have the problem that warnings aren't shown in my debugger-instance, but I tweaked a lot in the past. Anyway ... > I comment out the line when not running in the debugger because it generates a warning message. ... you could put that code into debugger's rc-file '.perldb' or into `PERL5DB` environment variable to make it the default behavior of the debugger. Like that you don't need to change the scripts. =) update this works for me `lanx@nc10-ubuntu:$ cat .perldb sub afterinit { $SIG{"__WARN__"}= sub { print "$_[0]"; $DB::single=1 }; }` [download] see perldebug for details Cheers Rolf ( addicted to the Perl Programming Language)	[reply] [d/l] [select]

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