Perl::Critic::PPerl::Critic::Policy::CodeLayout::ProhibitParensWithBuiltins(3)NAMEPerl::Critic::Policy::CodeLayout::ProhibitParensWithBuiltins - Write
"open $handle, $path" instead of "open($handle, $path)".
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
Conway suggests that all built-in functions be called without
parentheses around the argument list. This reduces visual clutter and
disambiguates built-in functions from user functions. Exceptions are
made for "my", "local", and "our" which require parentheses when called
with multiple arguments.
open($handle, '>', $filename); #not ok
open $handle, '>', $filename; #ok
split(/$pattern/, @list); #not ok
split /$pattern/, @list; #ok
CONFIGURATION
This Policy is not configurable except for the standard options.
NOTES
Coding with parentheses can sometimes lead to verbose and awkward
constructs, so I think the intent of Conway's guideline is to remove
only the unnecessary parentheses. This policy makes exceptions for
some common situations where parentheses are usually required.
However, you may find other situations where the parentheses are
necessary to enforce precedence, but they cause still violations. In
those cases, consider using the '## no critic' comments to silence
Perl::Critic.
BUGS
Some builtin functions (particularly those that take a variable number
of scalar arguments) should probably get parentheses. This policy
should be enhanced to allow the user to specify a list of builtins that
are exempt from the policy.
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 v5.14.1 Perl::Critic::Policy::CodeLayout::ProhibitParensWithBuiltins(3)
