fix: allow asserting pointers to const data

Author: quarthex

include/criterion/internal/assert/tag.h

@@ -129,7 +129,7 @@
 
 #define CRI_ASSERT_TEST_TAG_ptr         ,
 #define CRI_ASSERT_TEST_TAGC_ptr()      ,
-#define CRI_ASSERT_TYPE_TAG_ptr         void *,
+#define CRI_ASSERT_TYPE_TAG_ptr         const void *,
 #define CRI_ASSERT_TYPE_TAG_ID_ptr      ptr,
 
 #define CRI_ASSERT_TEST_TAG_str         ,
@@ -311,7 +311,7 @@ static inline char *CRI_USER_TAG_ID(tostr, uptr)(const uintptr_t *e)
     return str;
 }
 
-static inline char *CRI_USER_TAG_ID(tostr, ptr)(void **e)
+static inline char *CRI_USER_TAG_ID(tostr, ptr)(const void **e)
 {
     char *str = NULL;
     cr_asprintf(&str, "0x%" CRI_PRIxPTR, (uintptr_t) *e);

test/full/bug521.c

@@ -2,13 +2,18 @@
 #include <criterion/new/assert.h>
 
 Test(bug521, str) {
-  static const char *foo = "foo";
+  static const char *const foo = "foo";
   cr_assert(eq(str, foo, "foo"));
   cr_assert(ne(str, foo, "oof"));
 }
 
 Test(bug521, wcs) {
-  static const wchar_t *foo = L"foo";
+  static const wchar_t *const foo = L"foo";
   cr_assert(eq(wcs, foo, L"foo"));
   cr_assert(ne(wcs, foo, L"oof"));
+}
+
+Test(bug521, ptr) {
+  static const char *const foo = "foo";
+  cr_assert(eq(ptr, foo, foo));
 }