2 files changed, 27 insertions, 11 deletions
diff --git a/src/Simplex_tree/include/gudhi/Simplex_tree.h b/src/Simplex_tree/include/gudhi/Simplex_tree.h
index 74ae1713..b9c2a245 100644
--- a/src/Simplex_tree/include/gudhi/Simplex_tree.h
+++ b/src/Simplex_tree/include/gudhi/Simplex_tree.h
@@ -77,16 +77,7 @@ namespace Gudhi {
  * @{
  */
 
-/// Model of SimplexTreeOptions.
-struct Simplex_tree_options_full_featured {
-  typedef linear_indexing_tag Indexing_tag;
-  typedef int Vertex_handle;
-  typedef double Filtration_value;
-  typedef int Simplex_key;
-  static const bool store_key = true;
-  static const bool store_filtration = true;
-  static const bool contiguous_vertices = true;
-};
+struct Simplex_tree_options_full_featured;
 
 /**
  * \brief Simplex Tree data structure for representing simplicial complexes.
@@ -1159,6 +1150,31 @@ std::istream& operator>>(std::istream & is, Simplex_tree<T...> & st) {
 
   return is;
 }
+
+/// Model of SimplexTreeOptions.
+struct Simplex_tree_options_full_featured {
+  typedef linear_indexing_tag Indexing_tag;
+  typedef int Vertex_handle;
+  typedef double Filtration_value;
+  typedef int Simplex_key;
+  static const bool store_key = true;
+  static const bool store_filtration = true;
+  static const bool contiguous_vertices = false;
+};
+
+/** Model of SimplexTreeOptions, faster than
+  `Simplex_tree_options_full_featured` but note the unsafe
+  `contiguous_vertices` option. */
+struct Simplex_tree_options_fast_persistence {
+  typedef linear_indexing_tag Indexing_tag;
+  typedef int Vertex_handle;
+  typedef float Filtration_value;
+  typedef int Simplex_key;
+  static const bool store_key = true;
+  static const bool store_filtration = true;
+  static const bool contiguous_vertices = true;
+};
+
 /** @} */  // end defgroup simplex_tree
 
 }  // namespace Gudhi
diff --git a/src/Simplex_tree/test/simplex_tree_unit_test.cpp b/src/Simplex_tree/test/simplex_tree_unit_test.cpp
index fff00d77..c2e214c0 100644
--- a/src/Simplex_tree/test/simplex_tree_unit_test.cpp
+++ b/src/Simplex_tree/test/simplex_tree_unit_test.cpp
@@ -509,7 +509,7 @@ BOOST_AUTO_TEST_CASE(NSimplexAndSubfaces_tree_insertion) {
   // Find in the simplex_tree
   // ------------------------------------------------------------------------------------------------------------------
   typeVectorVertex simpleSimplexVector{1};
-  Simplex_tree<>::Simplex_handle simplexFound = st.find(simpleSimplexVector);
+  typeST::Simplex_handle simplexFound = st.find(simpleSimplexVector);
   std::cout << "**************IS THE SIMPLEX {1} IN THE SIMPLEX TREE ?\n";
   if (simplexFound != st.null_simplex())
     std::cout << "***+ YES IT IS!\n";