tests/usr.bin/xlint/lint1/d_gcc_extension.c

   1 /* extension */
   2 void a(void) {
   3     double __logbw = 1;
   4     if (__extension__(({ __typeof((__logbw)) x_ = (__logbw); !__builtin_isinf((x_)) && !__builtin_isnan((x_)); })))
   5         __logbw = 1;
   6 }