NAME

       Perl::Critic::Policy::ControlStructures::ProhibitUnreachableCode - Don't write code after
       an unconditional "die, exit, or next".

AFFILIATION

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

DESCRIPTION

       This policy prohibits code following a statement which unconditionally alters the program
       flow.  This includes calls to "exit", "die", "return", "next", "last" and "goto".  Due to
       common usage, "croak" and "confess" from Carp are also included.

       Code is reachable if any of the following conditions are true:

       •   Flow-altering statement has a conditional attached to it

       •   Statement is on the right side of an operator "&&", "||", "//", "and", "or", or "err".

       •   Code is prefixed with a label (can potentially be reached via "goto")

       •   Code is a subroutine

EXAMPLES

         # not ok

         exit;
         print "123\n";

         # ok

         exit if !$xyz;
         print "123\n";

         # not ok

         for ( 1 .. 10 ) {
             next;
             print 1;
         }

         # ok

         for ( 1 .. 10 ) {
             next if $_ == 5;
             print 1;
         }

         # not ok

         sub foo {
             my $bar = shift;
             return;
             print 1;
         }

         # ok

         sub foo {
             my $bar = shift;
             return if $bar->baz();
             print 1;
         }

         # not ok

         die;
         print "123\n";

         # ok

         die;
         LABEL: print "123\n";

         # not ok

         croak;
         do_something();

         # ok

         croak;
         sub do_something {}

CONFIGURATION

       This Policy is not configurable except for the standard options.

SEE ALSO

       Perl::Critic::Policy::ControlStructures::ProhibitPostfixControls

AUTHOR

       Peter Guzis <pguzis@cpan.org>

COPYRIGHT

       Copyright (c) 2006-2011 Peter Guzis.  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 v5.18.1                Perl::Critic::Policy::ControlStructures::ProhibitUnreachableCode(3pm)