%%
%% File: maps1.erl
%% Author: Björn-Egil Dahlberg
%% Created: 2014-01-17
%%
-module(maps1).
-compile([export_all]).
-export([recv/3, decode/1]).
%-record(can_pkt, {id, data :: binary(), timestamp}).
-type can_pkt() :: #{ id => term(), data => binary(), timestamp => term() }.
-type channel() :: atom() | pid() | {atom(),_}.
-spec recv(<<_:64,_:_*8>>, fun((can_pkt()) -> R), channel()) -> R.
recv(Packet, Fun, Chan) ->
#{id := Can_id, data := Can_data} = P = decode(Packet),
Fun(P).
-spec decode(<<_:64,_:_*8>>) -> #{id => <<_:11>>,timestamp => char(),_ => _}.
decode(<<_:12, Len:4, Timestamp:16, 0:3, Id:11/bitstring, 0:18,
Data:Len/binary, _/binary>>) ->
#{id => Id, data => Data, timestamp => Timestamp}.
t1() ->
#{bar=>fun t2/0}.
t2() -> ok.
-type map_state() :: #{ id => integer(), val => term() }.
-spec update(map_state(), term()) -> map_state().
update(#{ id := Id, val := Val } = M, X) when is_integer(Id) ->
M#{ val := [Val,X] }.
t3() ->
foo(#{greger => 3, #{arne=>anka} => 45}, 1).
foo(#{} = M, b) -> %% Error
M#{alfa => 42, beta := 1337}.
t4() ->
case #{} of
#{} -> ok;
Mod -> Mod:function(#{literal => map}, another_arg) %% Error
end.
