Fix signature of const buffer::data_ptr()

1 files changed, 5 insertions, 1 deletions

diff --git a/odb/details/buffer.hxx b/odb/details/buffer.hxx
index 394d96e..558be9b 100644
--- a/odb/details/buffer.hxx
+++ b/odb/details/buffer.hxx
@@ -65,13 +65,17 @@ namespace odb
         return static_cast<T*> (data_);
       }
 
+      // Note that strictly speaking the return type should be void* const*
+      // but that would make using this function too awkward since we often
+      // store the result as void*.
+      //
       void**
       data_ptr ()
       {
         return &data_;
       }
 
-      const void**
+      const void* const*
       data_ptr () const
       {
         return &data_;