strictures(3)

NAME
strictures - turn on strict and make all warnings fatal

SYNOPSIS
  use strictures 1;

is equivalent to

  use strict;
  use warnings FATAL => 'all';

except when called from a file where $0 matches:

  /^x?t\/.*(?:load|compile|coverage|use_ok).*\.t$/

and when either '.git' or '.svn' is present in the current directory (with the intention of only forcing extra tests on the author side) - or when the PERL_STRICTURES_EXTRA environment variable is set, in which case

  use strictures 1;

is equivalent to

  use strict;
  use warnings FATAL => 'all';
  no indirect 'fatal';
  no multidimensional;
  no bareword::filehandles;

Note that _EXTRA may at some point add even more tests, with only a minor version increase, but any changes to the effect of 'use strictures' in normal mode will involve a major version bump.

Be aware: THIS MEANS THE EXTRA TEST MODULES ARE REQUIRED FOR AUTHORS OF STRICTURES USING CODE - but not by end users thereof.

DESCRIPTION
I've been writing the equivalent of this module at the top of my code for about a year now. I figured it was time to make it shorter.

Things like the importer in 'use Moose' don't help me because they turn warnings on but don't make them fatal - which from my point of view is useless because I want an exception to tell me my code isn't warnings clean.

Any time I see a warning from my code, that indicates a mistake.

Any time my code encounters a mistake, I want a crash - not spew to STDERR and then unknown (and probably undesired) subsequent behaviour.

I also want to ensure that obvious coding mistakes, like indirect object syntax (and not so obvious mistakes that cause things to accidentally compile as such) get caught, but not at the cost of an XS dependency and not at the cost of blowing things up on another machine.

Therefore, strictures turns on indirect checking only when it thinks it's running in a compilation (or pod coverage) test - though if this causes undesired behaviour this can be overriden by setting the PERL_STRICTURES_EXTRA environment variable.

If additional useful author side checks come to mind, I'll add them to the _EXTRA code path only - this will result in a minor version increase (i.e. 1.000000 to 1.001000 (1.1.0) or similar). Any fixes only to the mechanism of this code will result in a subversion increas (i.e. 1.000000 to 1.000001 (1.0.1)).

If the behaviour of 'use strictures' in normal mode changes in any way, that will constitute a major version increase - and the code already checks when its version is tested to ensure that

  use strictures 1;

will continue to only introduce the current set of strictures even if 2.0 is installed.

METHODS

  import
This method does the setup work described above in "DESCRIPTION"

  VERSION
This method traps the strictures->VERSION(1) call produced by a use line with a version number on it and does the version check.

COMMUNITY AND SUPPORT

  IRC channel
irc.perl.org #toolchain

(or bug 'mst' in query on there or freenode)

  Git repository
Gitweb is on http://git.shadowcat.co.uk/ and the clone URL is:

  git clone git://git.shadowcat.co.uk/p5sagit/strictures.git

AUTHOR
mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk>

CONTRIBUTORS
None required yet. Maybe this module is perfect (hahahahaha ...).

COPYRIGHT
Copyright (c) 2010 the strictures "AUTHOR" and "CONTRIBUTORS" as listed above.

LICENSE
This library is free software and may be distributed under the same terms as perl itself.