18996eea5e6da975455e44bc1ee3a565d425a4916Douglas Gregor#ifndef PREFIX_H 28996eea5e6da975455e44bc1ee3a565d425a4916Douglas Gregor#define PREFIX_H 38996eea5e6da975455e44bc1ee3a565d425a4916Douglas Gregorint foo(int); 48996eea5e6da975455e44bc1ee3a565d425a4916Douglas Gregor#endif 5