gcc/testsuite/c-c++-common/Warray-compare-2.c

   1 /* PR c++/97573 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wall -Wno-array-compare" } */
   4
   5 #ifndef __cplusplus
   6 # define bool _Bool
   7 #endif
   8
   9 int arr1[5];
  10 int arr2[5];
  11 int arr3[2][2];
  12 int arr4[2][2];
  13
  14 bool
  15 g ()
  16 {
  17   bool b = arr1 == arr2; /* { dg-bogus "comparison between two arrays" } */
  18   b &= arr1 != arr2; /* { dg-bogus "comparison between two arrays" } */
  19   b &= arr1 > arr2; /* { dg-bogus "comparison between two arrays" } */
  20   b &= arr1 >= arr2; /* { dg-bogus "comparison between two arrays" } */
  21   b &= arr1 < arr2; /* { dg-bogus "comparison between two arrays" } */
  22   b &= arr1 <= arr2; /* { dg-bogus "comparison between two arrays" } */
  23 #ifdef __cplusplus
  24   b &= +arr1 == +arr2;
  25   b &= +arr1 != +arr2;
  26   b &= +arr1 > +arr2;
  27   b &= +arr1 >= +arr2;
  28   b &= +arr1 < +arr2;
  29   b &= +arr1 <= +arr2;
  30 #endif
  31   b &= &arr1[0] == &arr2[0];
  32   b &= &arr1[0] != &arr2[0];
  33   b &= &arr1[0] > &arr2[0];
  34   b &= &arr1[0] >= &arr2[0];
  35   b &= &arr1[0] < &arr2[0];
  36   b &= &arr1[0] <= &arr2[0];
  37
  38   b &= arr3 == arr4; /* { dg-bogus "comparison between two arrays" } */
  39
  40 #if defined(__cplusplus) && __cplusplus > 201703L
  41   auto cmp = arr1 <=> arr2; /* { dg-error "invalid operands" "" { target c++20 } } */
  42 #endif
  43   return b;
  44 }