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-rw-r--r--src/Simplex_tree/include/gudhi/Simplex_tree.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/Simplex_tree/include/gudhi/Simplex_tree.h b/src/Simplex_tree/include/gudhi/Simplex_tree.h
index 12be6e5d..2417313e 100644
--- a/src/Simplex_tree/include/gudhi/Simplex_tree.h
+++ b/src/Simplex_tree/include/gudhi/Simplex_tree.h
@@ -115,7 +115,9 @@ class Simplex_tree {
friend class Simplex_tree_boundary_simplex_iterator< Simplex_tree<FiltrationValue, SimplexKey, VertexHandle> >;
friend class Simplex_tree_complex_simplex_iterator< Simplex_tree<FiltrationValue, SimplexKey, VertexHandle> >;
friend class Simplex_tree_skeleton_simplex_iterator< Simplex_tree<FiltrationValue, SimplexKey, VertexHandle> >;
+
template<class T1, class T2> friend class Persistent_cohomology;
+
/* \brief Set of nodes sharing a same parent in the simplex tree. */
typedef Simplex_tree_siblings<Simplex_tree, Dictionary> Siblings;