--- /dev/null
+##############################################################################
+# $URL: http://perlcritic.tigris.org/svn/perlcritic/trunk/Perl-Critic/lib/Perl/Critic/Policy/NamingConventions/ProhibitMixedCaseVars.pm $
+# $Date: 2008-07-03 10:19:10 -0500 (Thu, 03 Jul 2008) $
+# $Author: clonezone $
+# $Revision: 2489 $
+##############################################################################
+
+package Perl::Critic::Policy::NamingConventions::ProhibitMixedCaseVars;
+
+use 5.006001;
+use strict;
+use warnings;
+use Readonly;
+
+use Perl::Critic::Utils qw{ :severities };
+
+use base 'Perl::Critic::Policy';
+
+our $VERSION = '1.088';
+
+#-----------------------------------------------------------------------------
+
+Readonly::Scalar my $PACKAGE_RX => qr/ :: /mx;
+Readonly::Scalar my $UPPER_LOWER => qr/ [[:upper:]] [[:lower:]] /xm;
+Readonly::Scalar my $LOWER_UPPER => qr/ [[:lower:]] [[:upper:]] /xm;
+Readonly::Scalar my $MIXED_RX => qr{ $UPPER_LOWER | $LOWER_UPPER }xmo;
+Readonly::Scalar my $DESC => 'Mixed-case variable name(s)';
+Readonly::Scalar my $EXPL => [ 44 ];
+
+#-----------------------------------------------------------------------------
+
+sub supported_parameters { return () }
+sub default_severity { return $SEVERITY_LOWEST }
+sub default_themes { return qw( core pbp cosmetic ) }
+sub applies_to { return 'PPI::Statement::Variable' }
+
+#-----------------------------------------------------------------------------
+
+sub violates {
+ my ( $self, $elem, undef ) = @_;
+ if ( _has_mixed_case_vars($elem) ) {
+ return $self->violation( $DESC, $EXPL, $elem );
+ }
+ return; #ok!
+}
+
+
+sub _has_mixed_case_vars {
+ my $elem = shift;
+ for my $variable_name ( $elem->variables() ) {
+
+ #Variables with fully qualified package names are exempt
+ #because we can't really be responsible for symbols that
+ #are defined in other packages.
+
+ next if $elem->type() eq 'local' && $variable_name =~ m/$PACKAGE_RX/xms;
+ return 1 if $variable_name =~ m/$MIXED_RX/xms;
+ }
+ return 0;
+}
+
+1;
+
+__END__
+
+#-----------------------------------------------------------------------------
+
+=pod
+
+=head1 NAME
+
+Perl::Critic::Policy::NamingConventions::ProhibitMixedCaseVars - Write C<$my_variable = 42> instead of C<$MyVariable = 42>.
+
+=head1 AFFILIATION
+
+This Policy is part of the core L<Perl::Critic> distribution.
+
+
+=head1 DESCRIPTION
+
+Conway's recommended naming convention is to use lower-case words
+separated by underscores. Well-recognized acronyms can be in ALL
+CAPS, but must be separated by underscores from other parts of the
+name.
+
+ my $foo_bar #ok
+ my $foo_BAR #ok
+ my @FOO_bar #ok
+ my %FOO_BAR #ok
+
+ my $FooBar #not ok
+ my $FOObar #not ok
+ my @fooBAR #not ok
+ my %fooBar #not ok
+
+
+=head1 CONFIGURATION
+
+This Policy is not configurable except for the standard options.
+
+
+=head1 SEE ALSO
+
+L<Perl::Critic::Policy::NamingConventions::ProhibitMixedCaseSubs>
+
+=head1 AUTHOR
+
+Jeffrey Ryan Thalhammer <thaljef@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2005-2008 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.
+
+=cut
+
+# Local Variables:
+# mode: cperl
+# cperl-indent-level: 4
+# fill-column: 78
+# indent-tabs-mode: nil
+# c-indentation-style: bsd
+# End:
+# ex: set ts=8 sts=4 sw=4 tw=78 ft=perl expandtab shiftround :