| // { dg-do assemble } |
| // { dg-options "-Wconversion" } |
| // Test that we resolve this case as mandated by the standard, but also |
| // warn about it. We choose op char* not because it is a member of B -- |
| // the standard says that all conversion ops are treated as coming from |
| // the type of the argument -- but because it is non-const. |
| |
| struct A { |
| operator const char *() const { return ""; } |
| }; |
| |
| struct B : public A { |
| operator char *() { return 0; } |
| }; |
| |
| int main() |
| { |
| B b; |
| if ((const char *)b != 0) // { dg-warning "choosing 'B" "B" } surprising overload resolution |
| // { dg-warning "for conversion" "conv" { target *-*-* } 19 } |
| // { dg-message "note" "note" { target *-*-* } 19 } |
| return 1; |
| if ((const char *)(const B)b == 0) |
| return 2; |
| if ((const char *)(const B &)b == 0) |
| return 3; |
| } |
