Perl::Critic::Policy::CodeLayout::ProhibitParensWithBuiltins - Write open $handle, $path instead of open($handle, $path).
open $handle, $path
open($handle, $path)
This Policy is part of the core Perl::Critic distribution.
Conway suggests that all built-in functions be called without parentheses around the argument list. This reduces visual clutter and disambiguates built-in functions from user functions. Exceptions are made for my, local, and our which require parentheses when called with multiple arguments.
my
local
our
open($handle, '>', $filename); #not ok open $handle, '>', $filename; #ok split(/$pattern/, @list); #not ok split /$pattern/, @list; #ok
This Policy is not configurable except for the standard options.
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.
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.
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
Copyright (c) 2005-2011 Imaginative Software Systems. All rights reserved.
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cpanm
cpanm Perl::Critic
CPAN shell
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