diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/stdlib/src/maps.erl | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl index 7ed32a3988..0da12cf8e2 100644 --- a/lib/stdlib/src/maps.erl +++ b/lib/stdlib/src/maps.erl @@ -32,7 +32,7 @@ new/0, put/3, remove/2, take/2, to_list/1, update/3, values/1]). --opaque iterator() :: [{term(), term()}]. +-opaque iterator() :: [{term(), term()}] | [[pos_integer() | map()]]. -export_type([iterator/0]). @@ -279,7 +279,10 @@ size(Val) -> Iterator :: iterator(). iterator(Map) when is_map(Map) -> - maps:to_list(Map); + case maps:size(Map) < 42 of + true -> maps:to_list(Map); + false -> [[1 | Map]] + end; iterator(M) -> erlang:error(error_type(M),[M]). @@ -289,6 +292,12 @@ iterator(M) -> V :: term(), NextIterator :: iterator(). next([]) -> none; +next([[Index | Map] | St]) -> + case erts_internal:map_get_index(Index, Map) of + SubMap when is_map(SubMap) -> next([[1 | SubMap], [Index+1|Map] | St]); + [K|V] -> {K,V,[[Index+1 | Map] | St]}; + none -> next(St) + end; next([{K, V} | I]) -> {K, V, I}. |