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Full Discussion: Perl strict
Top Forums Shell Programming and Scripting Perl strict Post 302276573 by buffoonix on Wednesday 14th of January 2009 05:42:27 AM
Old 01-14-2009
If you don't use the strict pragma in a Perl programme all the variables you define (or rather introduce) become implicitly package globals that appear in the symbol table.
At first glance this might tremendously ease the coding (for the novice) but this also is hugely error prone, especially to typos.
So if you inadvertently misspell a variable without strict the Perl compiler would silently declare a new package global without the faintest sign of warning, but this most of the times is pretty useless or even detrimental and will break your programme logic since you intended to refer to some previously declared and defined variable.
Instead when you use strict the Perl compiler will immediately abort compilation and issue an error message hinting at the reason and line which violated the syntax.
Besides, it is considered bad programming style to use global variables,
and one should almost always use lexically scoped variables (those declared by my)
Therefore, even the seasoned Perl programmer should always have the use strict; line at the beginning at their code, and that is one vital marker that indicates good Perl code.
 

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LEARN ABOUT CENTOS

perl::critic::policy::testinganddebugging::prohibitnostrict

Perl::Critic::Policy::TestingAndDebugging::ProhibitNoStrUser3Contributed Perl DocumePerl::Critic::Policy::TestingAndDebugging::ProhibitNoStrict(3)

NAME

       Perl::Critic::Policy::TestingAndDebugging::ProhibitNoStrict - Prohibit various flavors of "no strict".

AFFILIATION

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

DESCRIPTION

       There are good reasons for disabling certain kinds of strictures, But if you were wise enough to "use strict" in the first place, then it
       doesn't make sense to disable it completely.  By default, any "no strict" statement will violate this policy.  However, you can configure
       this Policy to allow certain types of strictures to be disabled (See "CONFIGURATION").  A bare "no strict" statement will always raise a
       violation.

CONFIGURATION

       The permitted strictures can be configured via the "allow" option.  The value is a list of whitespace-delimited stricture types that you
       want to permit.	These can be "vars", "subs" and/or "refs".  An example of this customization:

	   [TestingAndDebugging::ProhibitNoStrict]
	   allow = vars subs refs

SEE ALSO

       Perl::Critic::Policy::TestingAndDebugging::RequireUseStrict

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::TestingAndDebugging::ProhibitNoStrict(3)
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