rsmith added a comment. The version of this attribute that was voted into the C++ standard (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0189r1.pdf) does not support a message, and I expect that is the version that libc++ will want to use.
I think we should at least improve Clang's diagnostic message here, maybe something like: warning: value returned by call to function 'blah' should always be used note: 'blah' declared with attribute 'nodiscard' here It would also seem sensible to propose extending the standard attribute with an optional message. http://reviews.llvm.org/D17043 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
