http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49107
--- Comment #12 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-06-04 07:33:15 UTC --- I'd like to understand as soon as possible if this type of issue means that these traits cannot really be implemented with sfinae or not. Actually, as usual, the library is just an example and in case people should know if sfinae-based techniques have limitations beyond access-control (which by itself is being fixed) and our users should know.
