CZString as public when using NVCC, see issue #486

include/json/value.h

@@ -220,7 +220,14 @@ public:
   static const UInt64 maxUInt64;
 #endif // defined(JSON_HAS_INT64)
 
+// Workaround for bug in the NVIDIAs CUDA 9.1 nvcc compiler
+// when using gcc and clang backend compilers.  CZString
+// cannot be defined as private.  See issue #486
+#ifdef __NVCC__
+public:
+#else
 private:
+#endif
 #ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
   class CZString {
   public: