git.ozlabs.org Git - ccan/blob - ccan/str/test/compile_fail-isdigit.c

   1 #define CCAN_STR_DEBUG 1
   2 #include <ccan/str/str.h>
   3
   4 int main(int argc, char *argv[])
   5 {
   6 #ifdef FAIL
   7 #if !HAVE_BUILTIN_TYPES_COMPATIBLE_P || !HAVE_TYPEOF
   8 #error We need typeof to check isdigit.
   9 #endif
  10         char
  11 #else
  12         unsigned char
  13 #endif
  14                 c = argv[0][0];
  15
  16 #ifdef FAIL
  17         /* Fake fail on unsigned char platforms. */
  18         BUILD_ASSERT((char)255 < 0);
  19 #endif
  20
  21         return isdigit(c);
  22 }