Perl::Critic::Policy::ErrorHandling::RequireCarping(3)	User Contributed Perl Documentation Perl::Critic::Policy::ErrorHandling::RequireCarping(3)

NAME

       Perl::Critic::Policy::ErrorHandling::RequireCarping - Use functions from Carp instead of "warn" or "die".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       The "die" and "warn" functions both report the file and line number where the exception occurred.  But if someone else is using your
       subroutine, they usually don't care where your code blew up.  Instead, they want to know where their code invoked the subroutine.  The Carp
       module provides alternative methods that report the exception from the caller's file and line number.

       By default, this policy will not complain about "die" or "warn", if it can determine that the message will always result in a terminal
       newline.  Since perl suppresses file names and line numbers in this situation, it is assumed that no stack traces are desired either and
       none of the Carp functions are necessary.

	   die "oops" if $explosion;		 #not ok
	   warn "Where? Where?!" if $tiger;	 #not ok

	   open my $mouth, '<', 'food'
	       or die 'of starvation';		 #not ok

	   if (! $dentist_appointment) {
	       warn "You have bad breath!
";	 #ok
	   }

	   die "$clock not set.
" if $no_time;  #ok

	   my $message = "$clock not set.
";
	   die $message if $no_time;		 #not ok, not obvious

CONFIGURATION

       By default, this policy allows uses of "die" and "warn" ending in an explicit newline. If you give this policy an
       "allow_messages_ending_with_newlines" option in your .perlcriticrc with a false value, then this policy will prohibit such uses.

	   [ErrorHandling::RequireCarping]
	   allow_messages_ending_with_newlines = 0

       If you give this policy an "allow_in_main_unless_in_subroutine" option in your .perlcriticrc with a true value, then this policy will allow
       "die" and "warn" in name space main:: unless they appear in a subroutine, even if they do not end in an explicit newline.

	   [ErrorHandling::RequireCarping]
	   allow_in_main_unless_in_subroutine = 1

BUGS

       Should allow "die" when it is obvious that the "message" is a reference.

SEE ALSO

       Carp::Always

AUTHOR

       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT

       Copyright (c) 2005-2011 Imaginative Software Systems.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license
       can be found in the LICENSE file included with this module.

perl v5.16.3							    2014-06-09		    Perl::Critic::Policy::ErrorHandling::RequireCarping(3)