| // PR c++/51313 | |
| // { dg-do compile { target c++11 } } | |
| class ostream; | |
| extern "C" { | |
| extern int isdigit (int); | |
| } | |
| ostream& | |
| operator<<(ostream&, const unsigned char*); | |
| extern ostream cout; | |
| int main() | |
| { | |
| cout << isdigit(0); // { dg-error "invalid conversion" } | |
| } |