Work around a bug in visual studio 2015.

724cb500 · Davis King · df19361c · 724cb500
Commit 724cb500 authored May 27, 2017 by Davis King
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Showing with 4 additions and 3 deletions

dlib/dnn/core.h dlib/dnn/core.h +4 -3

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--- a/dlib/dnn/core.h
+++ b/dlib/dnn/core.h
@@ -60,11 +60,12 @@ namespace dlib
    namespace impl
    {
-        template <typename T, typename int_<decltype(&T::clean)>::type = 0>
+        // The reason we return an int for this version rather than doing the more straight forward thing (like we do above) is to avoid a bug in visual studio 2015.
-        void call_clean_method_if_exists (
+        template <typename T>
+        auto call_clean_method_if_exists (
            T& obj,
            special_
-        ) { obj.clean(); }
+        ) -> typename int_<decltype(&T::clean)>::type { obj.clean();  return 0;  }
        template <typename T>
        void call_clean_method_if_exists (T& , general_) {}