transpiling this https://github.com/efene/efene/blob/master/examples/use_macros.fn that includes this https://github.com/efene/efene/blob/master/examples/ms.hrl produces the following

efene_macro_use_output.erl

-file("examples/use_macros.fn", 1).

-module(use_macros).

-export([main/0]).

-file("examples/ms.hrl", 1).

what_am_i() -> a_function_in_the_macro_file.

-file("use_macros.fn", 1).

main() ->
    a_function_in_the_macro_file = what_am_i(),
    "bob" = "bob",
    2 * 3 = 2 * 3,
    {"bob", bob} = {"bob", bob},
    12 + 1 = 12 + 1,
    42 * 5 + 2 * 3 = 42 * 5 + 2 * 3,
    io:format("Call ~s: ~w~n",
              ["what_am_i()", what_am_i()]),
    "hi there" ++ "1 - 2" = "hi there" ++ "1 - 2",
    "1 * 2 + 3" = "1 * 2 + 3",
    1 + 2 + 3 = 1 + 2 + 3,
    {val, _, integer, 456} = {val, 123, integer, 456},
    {val, 123, integer, 456} = {val, 123, integer, 456},
    {val, 123, integer, 456} = {val, 123, integer, 456},
    1 + {val, 123, integer, 456} = 1 +
                                     {val, 123, integer, 456},
    FreeVar = 12,
    13 + 12 = 13 + FreeVar.