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-rw-r--r--odb/forward.hxx5
1 files changed, 5 insertions, 0 deletions
diff --git a/odb/forward.hxx b/odb/forward.hxx
index ff4a531..653bdbb 100644
--- a/odb/forward.hxx
+++ b/odb/forward.hxx
@@ -115,6 +115,11 @@ namespace odb
template <typename T> struct no_op_reference_cache_traits;
template <typename T> struct reference_cache_traits;
+ //
+ //
+ class result_impl;
+ class prepared_query_impl;
+
// Polymorphism support.
//
template <typename R>