Merge PR-1878 from michalmuskala/mm/map-new-bif-2 OTP-15200

maps:new/0 is no longer a BIF

4 files changed, 7 insertions, 29 deletions

diff --git a/bootstrap/lib/stdlib/ebin/maps.beam b/bootstrap/lib/stdlib/ebin/maps.beam
index ec0ebce58a..e24b5955d5 100644
--- a/bootstrap/lib/stdlib/ebin/maps.beam
+++ b/bootstrap/lib/stdlib/ebin/maps.beam
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index 7548924178..a770524221 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -629,7 +629,6 @@ bif maps:from_list/1
 bif maps:is_key/2
 bif maps:keys/1
 bif maps:merge/2
-bif maps:new/0
 bif maps:put/3
 bif maps:remove/2
 bif maps:update/3
diff --git a/erts/emulator/beam/erl_map.c b/erts/emulator/beam/erl_map.c
index cba17d3e6a..4a1fe4470e 100644
--- a/erts/emulator/beam/erl_map.c
+++ b/erts/emulator/beam/erl_map.c
@@ -1505,25 +1505,6 @@ int hashmap_key_hash_cmp(Eterm* ap, Eterm* bp)
     return ap ? -1 : 1;
 }
 
-/* maps:new/0 */
-
-BIF_RETTYPE maps_new_0(BIF_ALIST_0) {
-    Eterm* hp;
-    Eterm tup;
-    flatmap_t *mp;
-
-    hp    = HAlloc(BIF_P, (MAP_HEADER_FLATMAP_SZ + 1));
-    tup   = make_tuple(hp);
-    *hp++ = make_arityval(0);
-
-    mp    = (flatmap_t*)hp;
-    mp->thing_word = MAP_HEADER_FLATMAP;
-    mp->size = 0;
-    mp->keys = tup;
-
-    BIF_RET(make_flatmap(mp));
-}
-
 /* maps:put/3 */
 
 BIF_RETTYPE maps_put_3(BIF_ALIST_3) {
diff --git a/lib/stdlib/src/maps.erl b/lib/stdlib/src/maps.erl
index 60463feec2..6f5553c769 100644
--- a/lib/stdlib/src/maps.erl
+++ b/lib/stdlib/src/maps.erl
@@ -21,7 +21,7 @@
 -module(maps).
 
 -export([get/3, filter/2,fold/3,
-         map/2, size/1,
+         map/2, size/1, new/0,
          update_with/3, update_with/4,
          without/2, with/2,
          iterator/1, next/1]).
@@ -29,7 +29,7 @@
 %% BIFs
 -export([get/2, find/2, from_list/1,
          is_key/2, keys/1, merge/2,
-         new/0, put/3, remove/2, take/2,
+         put/3, remove/2, take/2,
          to_list/1, update/3, values/1]).
 
 -opaque iterator() :: {term(), term(), iterator()}
@@ -91,13 +91,6 @@ keys(_) -> erlang:nif_error(undef).
 merge(_,_) -> erlang:nif_error(undef).
 
 
-
--spec new() -> Map when
-    Map :: map().
-
-new() -> erlang:nif_error(undef).
-
-
 %% Shadowed by erl_bif_types: maps:put/3
 -spec put(Key,Value,Map1) -> Map2 when
     Key :: term(),
@@ -157,6 +150,11 @@ values(_) -> erlang:nif_error(undef).
 
 %% End of BIFs
 
+-spec new() -> Map when
+    Map :: #{}.
+
+new() -> #{}.
+
 -spec update_with(Key,Fun,Map1) -> Map2 when
       Key :: term(),
       Map1 :: map(),