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.IX Title "Perl::Critic::Policy::Variables::ProhibitAugmentedAssignmentInDeclaration 3pm"
.TH Perl::Critic::Policy::Variables::ProhibitAugmentedAssignmentInDeclaration 3pm 2024-12-15 "perl v5.40.0" "User Contributed Perl Documentation"
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.SH NAME
Perl::Critic::Policy::Variables::ProhibitAugmentedAssignmentInDeclaration \- Do not write " my $foo .= \*(Aqbar\*(Aq; ".
.SH AFFILIATION
.IX Header "AFFILIATION"
This Policy is part of the core Perl::Critic
distribution.
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Variable declarations that also do initialization with '=' are common.
Perl also allows you to use operators like '.=', '+=', etc., but it
it is more clear to not do so.
.PP
.Vb 5
\&    my $foo .= \*(Aqbar\*(Aq;              # same as my $foo = \*(Aqbar\*(Aq;
\&    our $foo *= 2;                 # same as our $foo = 0;
\&    my ( $foo, $bar ) += ( 1, 2 ); # same as my ( $foo, $bar ) = ( undef, 2 );
\&    local $Carp::CarpLevel += 1;   # same as local $Carp::CarpLevel = 1;
\&    state $foo += 2;               # adds 2 every time it\*(Aqs encountered
.Ve
.PP
Such constructs are usually the result of botched cut-and-paste, and often are
bugs. Some produce warnings.
.SH CONFIGURATION
.IX Header "CONFIGURATION"
There is an \f(CW\*(C`allow_our\*(C'\fR boolean option for this Policy. If set, augmented
assignments are allowed when declaring \f(CW\*(C`our\*(C'\fR variables. Since \f(CW\*(C`our\*(C'\fR
variables are globally accessible, some modules will want to allow users to
initialize the variable prior to the module using the variable. Modules may
also wish to use the same our variable in different scopes without declaring
it at the outer scope.
.PP
With this option set, the following are flagged as indicated:
.PP
.Vb 1
\&    our $DEBUG //= 1;           # ok
.Ve
.PP
This can be enabled in your \fI.perlcriticrc\fR:
.PP
.Vb 2
\&    [Perl::Critic::Policy::Variables::ProhibitAugmentedAssignmentInDeclaration]
\&    allow_our = 1
.Ve
.SH AUTHOR
.IX Header "AUTHOR"
Mike O'Regan
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright (c) 2011\-2023 Mike O'Regan
.PP
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.