-module(main).
-export([main/0]).

-record(left,  {value}).
-record(right, {value}).

match(#left {value=Value}, L, _) -> L(Value);
match(#right{value=Value}, _, R) -> R(Value).

main() ->
    io:format("~s~n", [match(#right{value="lol"},
        fun(_) -> "" end,
        fun(X) -> X  end)]).