diff -r bbadf84cfc2d -r 4d7a2238c5ac ucx/hash_map.c
--- a/ucx/hash_map.c	Sun May 21 11:52:06 2023 +0200
+++ b/ucx/hash_map.c	Sun May 21 16:34:58 2023 +0200
@@ -26,10 +26,12 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <string.h>
 #include "cx/hash_map.h"
 #include "cx/utils.h"
 
+#include <string.h>
+#include <assert.h>
+
 struct cx_hash_map_element_s {
     /** A pointer to the next element in the current bucket. */
     struct cx_hash_map_element_s *next;
@@ -334,13 +336,30 @@
     }
 }
 
-static CxIterator cx_hash_map_iterator(CxMap const *map) {
+static CxIterator cx_hash_map_iterator(
+        CxMap const *map,
+        enum cx_map_iterator_type type
+) {
     CxIterator iter;
 
     iter.src_handle = map;
     iter.base.valid = cx_hash_map_iter_valid;
     iter.base.next = cx_hash_map_iter_next;
-    iter.base.current = cx_hash_map_iter_current_entry;
+
+    switch (type) {
+        case CX_MAP_ITERATOR_PAIRS:
+            iter.base.current = cx_hash_map_iter_current_entry;
+            break;
+        case CX_MAP_ITERATOR_KEYS:
+            iter.base.current = cx_hash_map_iter_current_key;
+            break;
+        case CX_MAP_ITERATOR_VALUES:
+            iter.base.current = cx_hash_map_iter_current_value;
+            break;
+        default:
+            assert(false);
+    }
+
     iter.base.flag_removal = cx_hash_map_iter_flag_rm;
     iter.base.remove = false;
     iter.base.mutating = false;
@@ -370,40 +389,6 @@
     return iter;
 }
 
-static CxIterator cx_hash_map_iterator_keys(CxMap const *map) {
-    CxIterator iter = cx_hash_map_iterator(map);
-    iter.base.current = cx_hash_map_iter_current_key;
-    return iter;
-}
-
-static CxIterator cx_hash_map_iterator_values(CxMap const *map) {
-    CxIterator iter = cx_hash_map_iterator(map);
-    iter.base.current = cx_hash_map_iter_current_value;
-    return iter;
-}
-
-static CxMutIterator cx_hash_map_mut_iterator(CxMap *map) {
-    CxIterator it = cx_hash_map_iterator(map);
-    it.base.mutating = true;
-
-    // we know the iterators share the same memory layout
-    CxMutIterator iter;
-    memcpy(&iter, &it, sizeof(CxMutIterator));
-    return iter;
-}
-
-static CxMutIterator cx_hash_map_mut_iterator_keys(CxMap *map) {
-    CxMutIterator iter = cx_hash_map_mut_iterator(map);
-    iter.base.current = cx_hash_map_iter_current_key;
-    return iter;
-}
-
-static CxMutIterator cx_hash_map_mut_iterator_values(CxMap *map) {
-    CxMutIterator iter = cx_hash_map_mut_iterator(map);
-    iter.base.current = cx_hash_map_iter_current_value;
-    return iter;
-}
-
 static cx_map_class cx_hash_map_class = {
         cx_hash_map_destructor,
         cx_hash_map_clear,
@@ -411,11 +396,6 @@
         cx_hash_map_get,
         cx_hash_map_remove,
         cx_hash_map_iterator,
-        cx_hash_map_iterator_keys,
-        cx_hash_map_iterator_values,
-        cx_hash_map_mut_iterator,
-        cx_hash_map_mut_iterator_keys,
-        cx_hash_map_mut_iterator_values,
 };
 
 CxMap *cxHashMapCreate(