Fix drawing empty sequences

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

diff --git a/lib/LaTeX/TikZ/Set/Sequence.pm b/lib/LaTeX/TikZ/Set/Sequence.pm
index b38aa6b8e088ae24457ecf93dd24855047050f7a..afdc313813eaf7fea53e563d86db6b898a02f75c 100644 (file)
--- a/lib/LaTeX/TikZ/Set/Sequence.pm
+++ b/lib/LaTeX/TikZ/Set/Sequence.pm
@@ -9,11 +9,11 @@ LaTeX::TikZ::Set::Sequence - A set object grouping a sequence of objects.
 
 =head1 VERSION
 
-Version 0.01
+Version 0.02
 
 =cut
 
-our $VERSION = '0.01';
+our $VERSION = '0.02';
 
 use List::Util ();
 
@@ -86,9 +86,12 @@ sub add {
 sub draw {
  my $set = shift;
 
+ my @kids = $set->kids;
+ return [ ] unless @kids;
+
  List::Util::reduce { LaTeX::TikZ::Scope::fold($a, $b) }
   map $_->draw(@_),
-   $set->kids;
+   @kids;
 }
 
 LaTeX::TikZ::Interface->register(