https://bugs.llvm.org/show_bug.cgi?id=40524
Eric Fiselier <e...@efcs.ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
CC| |e...@efcs.ca
--- Comment #1 from Eric Fiselier <e...@efcs.ca> ---
Invoking a pointer to a 'const &' member function on an rvalue is a C++2a
extension. Prior to C++2a GCC and Clang accept it as conforming extension. But
in order for the extension to be conforming, it has to be disabled in SFINAE
contexts -- otherwise it could change the meaning of well-defined code.
If you compile your example with -std=c++17 -pedantic-errors then both
invocations are rejected. (https://godbolt.org/z/ofS4AB)
Both libc++ and libstdc++ reject this prior to C++2a but accept it after. This
is the correct behavior. There is nothing to do here.
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