struct node { int* operator int*(); }; gets you:
foo.cc:1: error: operator `int*' declared to return `int' BTW, a better diagnostic would be something like: error: operator `int*' should not declare a return type -- Summary: diagnostic shows wrong type Product: gcc Version: 3.4.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: igodard at pacbell dot net CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22256