add github workflow for test-pypi cross-OS wheel builds

Author: AlePalu

include/fdaPDE-cpp/fdaPDE/core/fdaPDE/src/finite_elements/dof_handler.h

@@ -312,7 +312,9 @@ class DofHandler<2, EmbedDim, finite_element_tag> :
     using Base::n_dofs_;
     using Base::triangulation_;
     static constexpr auto edge_pattern = TriangulationType::edge_pattern;
-
+    static constexpr int local_dim = TriangulationType::local_dim;
+    static constexpr int embed_dim = TriangulationType::embed_dim;
+  
     DofHandler() = default;
     DofHandler(const TriangulationType& triangulation) : Base(triangulation) { }
 
@@ -502,7 +504,9 @@ class DofHandler<3, 3, finite_element_tag> :
     using Base::n_dofs_;
     using Base::triangulation_;
     static constexpr auto edge_pattern = TriangulationType::edge_pattern;
-
+    static constexpr int local_dim = TriangulationType::local_dim;
+    static constexpr int embed_dim = TriangulationType::embed_dim;
+  
     DofHandler() = default;
     DofHandler(const TriangulationType& triangulation) : Base(triangulation) { }
 

include/fdaPDE-cpp/fdaPDE/core/fdaPDE/src/geoframe/data_layer.h

@@ -1085,12 +1085,12 @@ class scalar_data_layer {
         int n_cols = data.cols();
         if (n_cols == 0) { return os; }   // empty frame, nothing to print
         out.resize(n_cols);
-        auto stringify = []<typename T>(const T& t, bool is_na) {
+        auto stringify = []<typename T>(const T& t, bool is_na) -> std::string {
             if (is_na) { return std::string("NA"); }
-            if constexpr (!std::is_same_v<T, std::string>) {
-                return std::to_string(t);
-            } else {
+            if constexpr (std::is_same_v<T, std::string>) {
                 return t;
+            } else {
+                return std::format("{}", t);
             }
         };
         auto print = [&]<typename T>(std::vector<std::string>& out_, const std::string& typestring, const field& desc) {

include/fdaPDE-cpp/fdaPDE/core/fdaPDE/src/utility/mdarray.h

@@ -200,9 +200,15 @@ template <int... Extents> class MdExtents {
     std::array<index_t, Order> extents_ {(Extents == Dynamic ? 0 : Extents)...};
 };
 
-template <int N>
-using full_dynamic_extent_t = std::decay_t<decltype(internals::apply_index_pack<N>(
-  []<int... Ns_> { return MdExtents<((void)Ns_, Dynamic)...> {Ns_...}; }))>;
+// required by MVSC
+template <int N> struct make_full_dynamic_extents {
+    static constexpr auto value() {
+        return internals::apply_index_pack<N>([]<int... Ns_> { return MdExtents<((void)Ns_, Dynamic)...> {Ns_...}; });
+    }
+    using type = decltype(value());
+};
+
+template <int N> using full_dynamic_extent_t = typename make_full_dynamic_extents<N>::type;
 
 namespace internals {