en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/clang/test/SemaCXX/vararg-class.cpp#2868a736 Add a -Wclass-varargs to warn on objects of any class type being passed through an ellipsis. Since C++11 relaxed the rules on this, we allow a lot more bad code through silently, such as: const char *format = "%s"; std::experimental::string_view view = "foo"; printf(format, view);In this case, not only warn about a class type being used here, but also suggest that calling c_str() might be a good idea.llvm-svn: 202461 List of files: /llvm-project-15.0.7/clang/test/SemaCXX/vararg-class.cpp Fri, 28 Feb 2014 01:36:39 +0000 Richard Smith <richard-llvm@metafoo.co.uk>