gcc/testsuite/c-c++-common/pr69543-4.c

   1 /* { dg-options "-Wuninitialized" } */
   2
   3 /* Verify disabling a warning, where both the _Pragma and the
   4    affected code are within (different) macros.  */
   5
   6 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN    \
   7     _Pragma ("GCC diagnostic push") \
   8     _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
   9     _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
  10 # define YY_IGNORE_MAYBE_UNINITIALIZED_END \
  11     _Pragma ("GCC diagnostic pop")
  12
  13 #define WARNABLE_CODE *++yyvsp = yylval; /* { dg-bogus "used uninitialized" } */
  14
  15 void test (char yylval)
  16 {
  17   char *yyvsp; /* { dg-bogus "declared here" } */
  18   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
  19   WARNABLE_CODE
  20   YY_IGNORE_MAYBE_UNINITIALIZED_END
  21 }