Mark functions as generated in Docs chunk

Author: josevalim

lib/elixir/src/elixir_erl.erl

@@ -510,12 +510,15 @@ get_moduledoc_meta(Set) ->
 
 get_docs(Set, Module, Definitions, Kind) ->
   [{Key,
-    erl_anno:new(Line),
+    maybe_generated(erl_anno:new(Line), Ctx),
     [signature_to_binary(Module, Name, Signature)],
     doc_value(Doc, Name),
     Meta
    } || {Name, Arity} <- Definitions,
-        {Key, _Ctx, Line, Signature, Doc, Meta} <- ets:lookup(Set, {Kind, Name, Arity})].
+        {Key, Ctx, Line, Signature, Doc, Meta} <- ets:lookup(Set, {Kind, Name, Arity})].
+
+maybe_generated(Ann, nil) -> Ann;
+maybe_generated(Ann, _Ctx) -> erl_anno:set_generated(true, Ann).
 
 get_callback_docs(Set, Callbacks) ->
   [{Key,

lib/elixir/test/elixir/kernel/docs_test.exs

@@ -381,4 +381,30 @@ defmodule Kernel.DocsTest do
              {{:fuz, 0}, :none}
            ] = Enum.sort(function_docs)
   end
+
+  test "generated functions are annotated as such" do
+    write_beam(
+      defmodule ToBeUsed do
+        defmacro __using__(_) do
+          quote do
+            @doc "Hello"
+            def foo, do: :bar
+          end
+        end
+      end
+    )
+
+    write_beam(
+      defmodule WillBeUsing do
+        use ToBeUsed
+      end
+    )
+
+    {:docs_v1, _, _, _, _, _, docs} = Code.fetch_docs(WillBeUsing)
+
+    assert [
+             {{:function, :foo, 0}, [generated: true, location: 399], ["foo()"],
+              %{"en" => "Hello"}, %{}}
+           ] = docs
+  end
 end