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Support multiple clauses in select() match specs #199

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Merged
uwiger merged 1 commit into from
Jan 20, 2026
Merged

Support multiple clauses in select() match specs #199

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2 changes: 1 addition & 1 deletion patches/stdlib/gen_server.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -797,7 +797,7 @@ format_status(Opt, StatusData) ->
end,
Header = lists:concat(["Status for generic server ", NameTag]),
Log = sys:get_debug(log, Debug, []),
Specific =
Specific =
case erlang:function_exported(Mod, format_status, 2) of
true ->
case catch Mod:format_status(Opt, [PDict, State]) of
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15 changes: 8 additions & 7 deletions src/gproc.erl
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Expand Up @@ -2895,17 +2895,18 @@ monitor_me() ->
end.


pattern(L, Ctxt) when is_list(L) ->
[pattern_(P, Ctxt) || P <- L].


pattern([{'_', Gs, As}], T) ->
pattern_({'_', Gs, As}, T) ->
?l,
{HeadPat, Vs} = headpat(T, '$1', '$2', '$3'),
[{HeadPat, rewrite(Gs,Vs), rewrite(As,Vs)}];
pattern([{{A,B,C},Gs,As}], Scope) ->
{HeadPat, rewrite(Gs,Vs), rewrite(As,Vs)};
pattern_({{A,B,C},Gs,As}, Scope) ->
?l,
{HeadPat, Vars} = headpat(Scope, A,B,C),
[{HeadPat, rewrite(Gs,Vars), rewrite(As,Vars)}];
pattern([{Head, Gs, As}], Scope) ->
{HeadPat, rewrite(Gs,Vars), rewrite(As,Vars)};
pattern_({Head, Gs, As}, Scope) ->
?l,
{S, T} = get_s_t(Scope),
case is_var(Head) of
Expand All @@ -2914,7 +2915,7 @@ pattern([{Head, Gs, As}], Scope) ->
Vs = [{Head, obj_prod()}],
%% the headpat function should somehow verify that Head is
%% consistent with Scope (or should we add a guard?)
[{HeadPat, rewrite(Gs, Vs), rewrite(As, Vs)}];
{HeadPat, rewrite(Gs, Vs), rewrite(As, Vs)};
false ->
erlang:error(badarg)
end.
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