allow optional hashref as final arg to helpers

diff --git a/lib/Data/Query/ExprHelpers.pm b/lib/Data/Query/ExprHelpers.pm
index 674bacc..809948e 100644 (file)
--- a/lib/Data/Query/ExprHelpers.pm
+++ b/lib/Data/Query/ExprHelpers.pm
@@ -75,13 +75,21 @@ foreach my $name (values %Data::Query::Constants::CONST) {
     $dq->{type} and $dq->{type} eq $name
   };
   push @EXPORT, $sub;
-  if ($map{$name}) {
-    my @map = @{$map{$name}};
+  if (my @map = @{$map{$name}||[]}) {
     *$name = sub {
       my $dq = { type => $name };
-      foreach (0..$#_) {
+      foreach (0..$#map) {
         $dq->{$map[$_]} = $_[$_] if defined $_[$_];
       }
+
+      if (my $optional = $_[$#map+1]) {
+        unless(ref $optional eq 'HASH') {
+          require Carp;
+          Carp::croak("Not a hashreference");
+        }
+        @{$dq}{keys %$optional} = values %$optional;
+      }
+
       return $dq;
     };
     push @EXPORT, $name;