1 #ifdef _INCLUDE_NO_WARN 2 // the snippet will be included in an opt-out region 3 p1++; 4 5 #undef _INCLUDE_NO_WARN 6 7 #elif defined(_INCLUDE_WARN) 8 // the snippet will be included in a location where warnings are expected 9 p2++; // expected-note{{used in pointer arithmetic here}} 10 #undef _INCLUDE_WARN 11 12 #else 13 14 #endif 15