perl::critic::policy::controlstructures::prohibitunreachablecode(3) [centos man page]

Perl::Critic::Policy::ControlStructures::ProhibitUnreachUserCContributed Perl DPerl::Critic::Policy::ControlStructures::ProhibitUnreachableCode(3)

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:

       o   Flow-altering statement has a conditional attached to it

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

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

       o   Code is a subroutine

EXAMPLES

	 # not ok

	 exit;
	 print "123
";

	 # ok

	 exit if !$xyz;
	 print "123
";

	 # 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
";

	 # ok

	 die;
	 LABEL: print "123
";

	 # 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 v5.16.3							    2014-06-09 Perl::Critic::Policy::ControlStructures::ProhibitUnreachableCode(3)

Perl::Critic::Policy::Modules::ProhibitConditionalUseStaUsernContributed Perl Perl::Critic::Policy::Modules::ProhibitConditionalUseStatements(3pm)

NAME

       Perl::Critic::Policy::Modules::ProhibitConditionalUseStatements - Avoid putting conditional logic around compile-time includes.

AFFILIATION

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

DESCRIPTION

       Modules included via "use" are loaded at compile-time.  Placing conditional logic around the "use" statement has no effect on whether the
       module will be loaded.  Doing so can also serve to confuse the reader as to the author's original intent.

       If you need to conditionally load a module you should be using "require" instead.

       This policy will catch the following forms of conditional "use" statements:

	   # if-elsif-else
	   if ($a == 1) { use Module; }
	   if ($a == 1) { } elsif ($a == 2) { use Module; }
	   if ($a == 1) { } else { use Module; }

	   # for/foreach
	   for (1..$a) { use Module; }
	   foreach (@a) { use Module; }

	   # while
	   while ($a == 1) { use Module; }

	   # unless
	   unless ($a == 1) { use Module; }

	   # until
	   until ($a == 1) { use Module; }

	   # do-condition
	   do { use Module; } if $a == 1;
	   do { use Module; } while $a == 1;
	   do { use Module; } unless $a == 1;
	   do { use Module; } until $a == 1;

	   # operator-do
	   $a == 1 || do { use Module; };
	   $a == 1 && do { use Module; };
	   $a == 1 or do { use Module; };
	   $a == 1 and do { use Module; };

	   # non-string eval
	   eval { use Module; };

       Including a module via "use" in bare blocks, standalone do blocks, or string evals is allowed.

	   # bare block
	   { use Module; }

	   # do
	   do { use Module; }

	   # string eval
	   eval "use Module";

CONFIGURATION

       This Policy is not configurable except for the standard options.

AUTHOR

       Peter Guzis <pguzis@cpan.org>

COPYRIGHT

       Copyright (c) 2010-2011 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 v5.14.2							    2012-06-07Perl::Critic::Policy::Modules::ProhibitConditionalUseStatements(3pm)