Util.fields_info(): convert field names to string

lib/util.ex

@@ -1,9 +1,9 @@
 defmodule Scopes.Util do
 
   defmacro fields_info(fields) do
-    names = for {f, _, _} <- fields do f end
-    quote do
-      Enum.zip(unquote(names), unquote(fields))
+    names = for f <- fields do Macro.to_string(f) end
+    quote bind_quoted: [names: names, fields: fields] do
+      Enum.zip(names, fields) |> Map.new
     end
   end
 end

test/util_test.exs

@@ -6,10 +6,8 @@ defmodule Scopes.UtilTest do
 
   describe "info:" do
     test "fields" do
-      a = 17
-      b = 22
-      c = 42
-      assert [a: 17, b: 22, c: 42] = Util.fields_info([a, b, c])
+      {a, b, c} = {17, 22, 42}
+      assert %{"a" => 17, "b" => 22, "c" => 42} = Util.fields_info([a, b, c])
     end
   end
 end