map_type_t map_types[] = { MAP_TYPE_LIST, MAP_TYPE_SKIPLIST, MAP_TYPE_HASHTABLE };
for (int i = 0; i < sizeof(map_types)/sizeof(*map_types); ++i) {
#ifdef TEST_STRING_KEYS
map_type_t map_types[] = { MAP_TYPE_LIST, MAP_TYPE_SKIPLIST, MAP_TYPE_HASHTABLE };
for (int i = 0; i < sizeof(map_types)/sizeof(*map_types); ++i) {
#ifdef TEST_STRING_KEYS