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 (! $dentist_appointment) {
warn "You have bad breath!\n"; #ok
}
die "$clock not set.\n" if $no_time; #ok
my $message = "$clock not set.\n";
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.