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-rw-r--r--odb/traversal/relational/key.hxx9
1 files changed, 9 insertions, 0 deletions
diff --git a/odb/traversal/relational/key.hxx b/odb/traversal/relational/key.hxx
index 42fc75a..1e38b6e 100644
--- a/odb/traversal/relational/key.hxx
+++ b/odb/traversal/relational/key.hxx
@@ -12,6 +12,15 @@ namespace traversal
{
namespace relational
{
+ struct contains: edge<semantics::relational::contains>
+ {
+ contains () {}
+ contains (node_dispatcher& n) {node_traverser (n);}
+
+ virtual void
+ traverse (type&);
+ };
+
template <typename T>
struct key_template: node<T>
{