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 /* TODO: XFAIL: both C and C++ erroneously fail to suppress the warning
   7    The warning is reported at the macro definition location, rather than
   8    the macro expansion location.  */
   9
  10 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN    \
  11     _Pragma ("GCC diagnostic push") \
  12     _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
  13     _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
  14 # define YY_IGNORE_MAYBE_UNINITIALIZED_END \
  15     _Pragma ("GCC diagnostic pop")
  16
  17 #define WARNABLE_CODE *++yyvsp = yylval; /* { dg-bogus "used uninitialized" "" { xfail *-*-* } } */
  18
  19 void test (char yylval)
  20 {
  21   char *yyvsp; /* { dg-bogus "declared here" "" { xfail *-*-* } } */
  22   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
  23   WARNABLE_CODE
  24   YY_IGNORE_MAYBE_UNINITIALIZED_END
  25 }