tests/tests2/93_integer_promotion.c

   1 /* integer promotion */
   2
   3 int printf(const char*, ...);
   4 #define promote(s) printf(" %ssigned : %s\n", (s) - 100 < 0 ? "  " : "un", #s);
   5
   6 int main (void)
   7 {
   8     struct {
   9         unsigned ub:3;
  10         unsigned u:32;
  11         unsigned long long ullb:35;
  12         unsigned long long ull:64;
  13         unsigned char c;
  14     } s = { 1, 1, 1 };
  15
  16     promote(s.ub);
  17     promote(s.u);
  18     promote(s.ullb);
  19     promote(s.ull);
  20     promote(s.c);
  21     printf("\n");
  22
  23     promote((1 ? s.ub : 1));
  24     promote((1 ? s.u : 1));
  25     promote((1 ? s.ullb : 1));
  26     promote((1 ? s.ull : 1));
  27     promote((1 ? s.c : 1));
  28     printf("\n");
  29
  30     promote(s.ub << 1);
  31     promote(s.u << 1);
  32     promote(s.ullb << 1);
  33     promote(s.ull << 1);
  34     promote(s.c << 1);
  35     printf("\n");
  36
  37     promote(+s.ub);
  38     promote(+s.u);
  39     promote(+s.ullb);
  40     promote(+s.ull);
  41     promote(+s.c);
  42     printf("\n");
  43
  44     promote(-s.ub);
  45     promote(-s.u);
  46     promote(-s.ullb);
  47     promote(-s.ull);
  48     promote(-s.c);
  49     printf("\n");
  50
  51     promote(~s.ub);
  52     promote(~s.u);
  53     promote(~s.ullb);
  54     promote(~s.ull);
  55     promote(~s.c);
  56     printf("\n");
  57
  58     promote(!s.ub);
  59     promote(!s.u);
  60     promote(!s.ullb);
  61     promote(!s.ull);
  62     promote(!s.c);
  63     printf("\n");
  64
  65     promote(+(unsigned)s.ub);
  66     promote(-(unsigned)s.ub);
  67     promote(~(unsigned)s.ub);
  68     promote(!(unsigned)s.ub);
  69
  70     return 0;
  71 }