carp::heavy(3pm) [redhat man page]

Carp::Heavy(3pm)					 Perl Programmers Reference Guide					  Carp::Heavy(3pm)

NAME

       Carp heavy machinery - no user serviceable parts inside

perl v5.8.0							    2002-06-01							  Carp::Heavy(3pm)

Carp::Always(3pm)					User Contributed Perl Documentation					 Carp::Always(3pm)

NAME

       Carp::Always - Warns and dies noisily with stack backtraces

SYNOPSIS

	 use Carp::Always;

       makes every "warn()" and "die()" complains loudly in the calling package and elsewhere. More often used on the command line:

	 perl -MCarp::Always script.pl

DESCRIPTION

       This module is meant as a debugging aid. It can be used to make a script complain loudly with stack backtraces when warn()ing or die()ing.

       Here are how stack backtraces produced by this module looks:

	 # it works for explicit die's and warn's
	 $ perl -MCarp::Always -e 'sub f { die "arghh" }; sub g { f }; g'
	 arghh at -e line 1
		 main::f() called at -e line 1
		 main::g() called at -e line 1

	 # it works for interpreter-thrown failures
	 $ perl -MCarp::Always -w -e 'sub f { $a = shift; @a = @$a };' 
				  -e 'sub g { f(undef) }; g'
	 Use of uninitialized value in array dereference at -e line 1
		 main::f('undef') called at -e line 2
		 main::g() called at -e line 2

       In the implementation, the "Carp" module does the heavy work, through "longmess()". The actual implementation sets the signal hooks
       $SIG{__WARN__} and $SIG{__DIE__} to emit the stack backtraces.

       Oh, by the way, "carp" and "croak" when requiring/using the "Carp" module are also made verbose, behaving like "cluck" and "confess",
       respectively.

   EXPORT
       Nothing at all is exported.

ACKNOWLEDGMENTS

       This module was born as a reaction to a release of Acme::JavaTrace by Sebastien Aperghis-Tramoni.  Sebastien also has a newer module called
       Devel::SimpleTrace with the same code and fewer flame comments on docs. The pruning of the uselessly long docs of this module were prodded
       by Michael Schwern.

       Schwern and others told me "the module name stinked" - it was called "Carp::Indeed". After thinking long and not getting nowhere, I went
       with nuffin's suggestion and now it is called "Carp::Always".  "Carp::Indeed" which is now deprecate lives in its own distribution (which
       won't go anywhere but will stay there as a redirection to this module).

SEE ALSO

       o   Carp

       o   Acme::JavaTrace and Devel::SimpleTrace

       o   Carp::Always::Color

       o   Carp::Source::Always

       Please report bugs via CPAN RT http://rt.cpan.org/NoAuth/Bugs.html?Dist=Carp-Always.

BUGS

       Every (un)deserving module has its own pet bugs.

       o   This module does not play well with other modules which fusses around with "warn", "die", $SIG{'__WARN__'}, $SIG{'__DIE__'}.

       o   Test scripts are good. I should write more of these.

       o   I don't know if this module name is still a bug as it was at the time of "Carp::Indeed".

AUTHOR

       Adriano Ferreira, <ferreira@cpan.org>

COPYRIGHT AND LICENSE

       Copyright (C) 2005-2012 by Adriano R. Ferreira

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-04-18							 Carp::Always(3pm)