File 5402-features-Speed-up-check-for-atoms-being-fe... of Package erlang

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File 5402-features-Speed-up-check-for-atoms-being-feature-keyw.patch of Package erlang (Revision 2b8d27ae7717c343be1a05a52e3dc269)

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From 80cb66eadf5ebbb6799e49643e86fa46480def33 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cons=20T=20=C3=85hs?= <cons@erlang.org>
Date: Mon, 23 May 2022 16:39:21 +0200
Subject: [PATCH 2/3] [features] Speed up check for atoms being feature
 keywords

---
 lib/stdlib/src/erl_lint.erl | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index 1d9f723185..c2a38ca441 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -167,6 +167,9 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
                    :: #{ta() => #typeinfo{}},
                exp_types=gb_sets:empty()        %Exported types
                    :: gb_sets:set(ta()),
+               feature_keywords =               %Keywords in
+                                                %configurable features
+                   feature_keywords() :: #{atom() => atom()},
                bvt = none :: 'none' | [any()],  %Variables in binary pattern
                gexpr_context = guard            %Context of guard expression
                    :: gexpr_context()
@@ -4168,15 +4171,19 @@ test_overriden_by_local(Anno, OldTest, Arity, St) ->
 	    St
     end.
 
+feature_keywords() ->
+    Features = erl_features:all(),
+    G = fun(Ftr, Map) ->
+                Keywords = erl_features:keywords(Ftr),
+                Add = fun(Keyword, M) -> maps:put(Keyword, Ftr, M) end,
+                lists:foldl(Add, Map, Keywords)
+        end,
+    lists:foldl(G, #{}, Features).
+
 %% keyword_warning(Anno, Atom, State) -> State.
 %%  Add warning for atoms that will be reserved keywords in the future.
 %%  (Currently, no such keywords to warn for.)
 keyword_warning(Anno, Atom, St) ->
-    Reserved =
-        fun(Ftr) ->
-                lists:member(Atom, erl_features:keywords(Ftr))
-        end,
-
     case is_warn_enabled(keyword_warning, St) of
         true ->
             case erl_anno:text(Anno) of
@@ -4184,10 +4191,10 @@ keyword_warning(Anno, Atom, St) ->
                     %% Don't warn for quoted atoms
                     St;
                 _ ->
-                    Ftrs = erl_features:all(),
-                    case lists:filter(Reserved, Ftrs) of
-                        [] -> St;
-                        [Ftr] ->
+                    Keywords = St#lint.feature_keywords,
+                    case maps:find(Atom, Keywords) of
+                        error -> St;
+                        {ok, Ftr} ->
                             add_warning(Anno, {future_feature, Ftr, Atom}, St)
                     end
             end;
-- 
2.35.3

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File 5402-features-Speed-up-check-for-atoms-being-feature-keyw.patch of Package erlang (Revision 2b8d27ae7717c343be1a05a52e3dc269)

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