Perl::Critic::Policy::InputOutput::RequireBracedFileHandleWithPrint
The print function has a unique syntax that supports an optional file handle argument. Conway suggests wrapping this argument in braces to make it visually stand out from the other arguments. When you put braces around any of the special package-level file handles like STDOUT, STDERR, and DATA, you must the '*' sigil or else it won't compile under use strict 'subs'.
print
STDOUT
STDERR
DATA
'*'
use strict 'subs'
print $FH "Mary had a little lamb\n"; #not ok print {$FH} "Mary had a little lamb\n"; #ok print STDERR $foo, $bar, $baz; #not ok print {STDERR} $foo, $bar, $baz; #won't compile under 'strict' print {*STDERR} $foo, $bar, $baz; #perfect!
Jeffrey Ryan Thalhammer <thaljef@cpan.org>
Copyright (c) 2005-2007 Jeffrey Ryan Thalhammer. 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.
To install Perl::Critic, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Perl::Critic
CPAN shell
perl -MCPAN -e shell install Perl::Critic
For more information on module installation, please visit the detailed CPAN module installation guide.