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Perl::Critic::Policy::InputOutput::RequireCheckedSyscalls - Return value of flagged
This Policy is part of the core Perl::Critic distribution.
This performs identically to InputOutput::RequireCheckedOpen/Close except that this is
configurable to apply to any function, whether core or user-defined.
If your module uses Fatal, Fatal::Exception, or autodie then any functions wrapped by
those modules will not trigger this policy. For example:
use Fatal qw(open);
open my $fh, $filename; # no violation
close $fh; # yes violation
open $filehandle, $mode, $filename; # no violation
Currently, autodie is not properly treated as a pragma; its lexical effects aren't taken
This policy watches for a configurable list of function names. By default, it applies to
"open", "print", "say" and "close". You can override this to set it to a different list
of functions with the "functions" and "exclude_functions" settings. To do this, put
entries in a .perlcriticrc file like this:
functions = open opendir read readline readdir close closedir
We have defined a few shortcuts for creating this list
functions = :defaults opendir readdir closedir
functions = :builtins
functions = :all
The ":builtins" shortcut above represents all of the builtin functions that have error
conditions (about 65 of them, many of them rather obscure).
You can require checking all builtins except "print" by combining the "functions" and
functions = :builtins
exclude_functions = print
This is a lot easier to read than the alternative.
The ":all" is the insane case: you must check the return value of EVERY function call,
even "return" and "exit". Yes, this "feature" is overkill and is wasting CPU cycles on
your computer by just existing. Nyah nyah. I shouldn't code after midnight.
Initial development of this policy was supported by a grant from the Perl Foundation.
This policy module is based heavily on policies written by Andrew Moore
Chris Dolan <email@example.com>
Copyright (c) 2007-2011 Chris Dolan. Many 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 Perl::Critic::Policy::InputOutput::RequireCheckedSyscalls(3)
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