from c.l.c.moderated by Maxim Yegorushkin: #include <algorithm>
namespace N { #ifdef SHOW_BUG struct A { }; int swap(A&, A&); #else struct A { friend int swap(A&, A&); }; #endif struct B : A { }; void swap(B& x, B& y) { using std::swap; typedef char a[sizeof(swap(static_cast<A&>(x), static_cast<A&>(y))) ? 1 : -1] ; // compiles only if int swap(A&, A&) is found } } -- Summary: name lookup / friend function Product: gcc Version: 3.4.3 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: sstrasser at systemhaus-gruppe dot de CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21555