http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53573
--- Comment #18 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-05 11:57:20 UTC --- (In reply to comment #16) > why does ADL work here if [basic.lookup.argdep] means what you imply? That's not ADL, so I don't know what you're asking. Bugzilla is not the right place to learn C++, please take this to an appropriate forum.