gcc/testsuite/g++.dg/cpp0x/pr51313.C

   1 // PR c++/51313
   2 // { dg-do compile { target c++11 } }
   3
   4 class ostream;
   5
   6 extern "C" {
   7   extern int isdigit (int);
   8 }
   9
  10 ostream&
  11 operator<<(ostream&, const unsigned char*);
  12
  13 extern ostream cout;
  14
  15 int main()
  16 {
  17   cout << isdigit(0);  // { dg-error "invalid conversion" }
  18 }