Added missing require_not

stan-dev · Mar 18, 2021 · c5b5e24 · c5b5e24
1 parent 403c06c
commit c5b5e24
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/stan/io/deserializer.hpp b/src/stan/io/deserializer.hpp
@@ -1061,7 +1061,7 @@ class deserializer {
    * @tparam Ret Type of output
    * @return Unconstrained vector
    */
-  template <typename Ret>
+  template <typename Ret, require_not_std_vector_t<Ret>* = nullptr>
   inline auto read_free_simplex(size_t size) {
     return stan::math::simplex_free(this->read<Ret>(size));
   }