Test handler definedness in LaTeX::TikZ::Functor

[perl/modules/LaTeX-TikZ.git] / lib / LaTeX / TikZ / Functor.pm

diff --git a/lib/LaTeX/TikZ/Functor.pm b/lib/LaTeX/TikZ/Functor.pm
index 344816438038170d7a7f5668f9929fc14b67ade9..2b6974e995a2854ada2a3714a5d4cf4911f99022 100644 (file)
--- a/lib/LaTeX/TikZ/Functor.pm
+++ b/lib/LaTeX/TikZ/Functor.pm
@@ -60,7 +60,7 @@ BEGIN {
   }
 
   Carp::confess("Invalid handler for target $target")
-                                                  unless ref $handler eq 'CODE';
+                             unless defined $handler and ref $handler eq 'CODE';
 
   return [ $target, $handler, $is_set ];
  });
@@ -160,6 +160,10 @@ LaTeX::TikZ::Interface->register(
  },
 );
 
+=head1 SEE ALSO
+
+L<LaTeX::TikZ>.
+
 =head1 AUTHOR
 
 Vincent Pit, C<< <perl at profvince.com> >>, L<http://www.profvince.com>.