core: revise syntax to support Visual C++ 2013

729848ca · Joe Howse · 371bba8f · 729848ca
Commit 729848ca authored Jun 20, 2019 by Joe Howse
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cvstd_wrapper.hpp modules/core/include/opencv2/core/cvstd_wrapper.hpp +5 -0

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--- a/modules/core/include/opencv2/core/cvstd_wrapper.hpp
+++ b/modules/core/include/opencv2/core/cvstd_wrapper.hpp
@@ -49,7 +49,12 @@ private:
    typedef decltype(check<C>(0)) type;

 public:
+#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1900/*MSVS 2015*/)
    static CV_CONSTEXPR bool value = type::value;
+#else
+    // support MSVS 2013
+    static const int value = type::value;
+#endif
 };
 } // namespace sfinae