Ensure escaping works within struct fields, closes #14817

Author: josevalim

lib/elixir/src/elixir_map.erl

@@ -38,7 +38,8 @@ expand_struct(Meta, Left, {'%{}', MapMeta, MapArgs}, S, #{context := Context} =
           Keys = ['__struct__'] ++ AssocKeys,
           WithoutKeys = lists:sort(maps:to_list(maps:without(Keys, Struct))),
           StructAssocs = elixir_quote:escape(WithoutKeys, none, false),
-          {{'%', Meta, [ELeft, {'%{}', MapMeta, StructAssocs ++ Assocs}]}, SE, EE};
+          {EStructAssocs, SA, EA} = elixir_expand:expand(StructAssocs, SE, EE),
+          {{'%', Meta, [ELeft, {'%{}', MapMeta, EStructAssocs ++ Assocs}]}, SA, EA};
 
         {'%{}', MapMeta, Assocs} ->
           _ = load_struct_info(Meta, ELeft, Assocs, EE),

lib/elixir/test/elixir/macro_test.exs

@@ -176,6 +176,17 @@ defmodule MacroTest do
              } = Macro.escape(~r/foo/)
     end
 
+    @tag :re_import
+    test "escape works within structs fields" do
+      defmodule Test do
+        # Structs have their own escape logic, which now needs to be expanded
+        defstruct my_regex: ~r/^hi$/
+        def init, do: %__MODULE__{}
+      end
+
+      assert %Regex{} = Test.init().my_regex
+    end
+
     defmodule EscapedStruct do
       defstruct [:ast, :ref]