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-rw-r--r--src/Bottleneck_distance/concept/Persistence_diagram.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/Bottleneck_distance/concept/Persistence_diagram.h b/src/Bottleneck_distance/concept/Persistence_diagram.h
index 2d841086..2706716b 100644
--- a/src/Bottleneck_distance/concept/Persistence_diagram.h
+++ b/src/Bottleneck_distance/concept/Persistence_diagram.h
@@ -33,14 +33,14 @@ namespace bottleneck_distance {
*
* \ingroup bottleneck_distance
*/
-struct Diagram_point;
+typename Diagram_point;
/** \brief Concept of persistence diagram. It's a range of Diagram_point.
* std::begin(diagram) and std::end(diagram) must return corresponding iterators.
*
* \ingroup bottleneck_distance
*/
-struct Persistence_Diagram;
+typename Persistence_Diagram;
} // namespace bottleneck_distance