patch 8.1.1228: not possible to process tags with a function
Problem: Not possible to process tags with a function.
Solution: Add tagfunc() (Christian Brabandt, Andy Massimino, closes #4010)
diff --git a/src/dict.c b/src/dict.c
index 7d49599..007a7ff 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -449,6 +449,55 @@
}
/*
+ * Initializes "iter" for iterating over dictionary items with
+ * dict_iterate_next().
+ * If "var" is not a Dict or an empty Dict then there will be nothing to
+ * iterate over, no error is given.
+ * NOTE: The dictionary must not change until iterating is finished!
+ */
+ void
+dict_iterate_start(typval_T *var, dict_iterator_T *iter)
+{
+ if (var->v_type != VAR_DICT || var->vval.v_dict == NULL)
+ iter->dit_todo = 0;
+ else
+ {
+ dict_T *d = var->vval.v_dict;
+
+ iter->dit_todo = d->dv_hashtab.ht_used;
+ iter->dit_hi = d->dv_hashtab.ht_array;
+ }
+}
+
+/*
+ * Iterate over the items referred to by "iter". It should be initialized with
+ * dict_iterate_start().
+ * Returns a pointer to the key.
+ * "*tv_result" is set to point to the value for that key.
+ * If there are no more items, NULL is returned.
+ */
+ char_u *
+dict_iterate_next(dict_iterator_T *iter, typval_T **tv_result)
+{
+ dictitem_T *di;
+ char_u *result;
+
+ if (iter->dit_todo == 0)
+ return NULL;
+
+ while (HASHITEM_EMPTY(iter->dit_hi))
+ ++iter->dit_hi;
+
+ di = HI2DI(iter->dit_hi);
+ result = di->di_key;
+ *tv_result = &di->di_tv;
+
+ --iter->dit_todo;
+ ++iter->dit_hi;
+ return result;
+}
+
+/*
* Add a dict entry to dictionary "d".
* Returns FAIL when out of memory and when key already exists.
*/