use _v prefixed version

Author: sloriot

Box_intersection_d/include/CGAL/Box_intersection_d/segment_tree.h

@@ -325,33 +325,36 @@ class Has_member_report
   static const bool value = (sizeof(f<T>(0)) == sizeof(char));
 };
 
+template <class T>
+CGAL_CPP17_INLINE constexpr bool Has_member_report_v = Has_member_report<T>::value;
+
 template <typename Callback>
 inline
-std::enable_if_t<Has_member_report<Callback>::value, bool>
+std::enable_if_t<Has_member_report_v<Callback>, bool>
 report_impl(Callback callback, int dim)
 {
   return callback.report(dim);
 }
 
 template <typename Callback>
 inline
-std::enable_if_t<!Has_member_report<Callback>::value, bool>
+std::enable_if_t<!Has_member_report_v<Callback>, bool>
 report_impl(const Callback&, int)
 {
   return false;
 }
 
 template <typename Callback>
 inline
-std::enable_if_t<Has_member_report<Callback>::value, void>
+std::enable_if_t<Has_member_report_v<Callback>, void>
 progress_impl(Callback callback, double d)
 {
   callback.progress(d);
 }
 
 template <typename Callback>
 inline
-std::enable_if_t<!Has_member_report<Callback>::value, void>
+std::enable_if_t<!Has_member_report_v<Callback>, void>
 progress_impl(const Callback&, double)
 {}
 

Installation/include/CGAL/config.h

@@ -499,6 +499,12 @@ namespace cpp11{
 #  define CGAL_FALLTHROUGH while(false){}
 #endif
 
+#if CGAL_CXX17
+#  define CGAL_CPP17_INLINE inline
+#else
+#  define CGAL_CPP17_INLINE
+#endif
+
 #ifndef CGAL_NO_ASSERTIONS
 #  define CGAL_NO_ASSERTIONS_BOOL false
 #else