Encode unknown terms as null

src/jsxrecord.erl

@@ -96,8 +96,11 @@ encode_json(Term) ->
         skip_values => [],
         proplists => true,
         encode_list => fun encode_list/2,
-        encode_tuple => fun encode_tuple/2
-        % error_handler => fun jsx_error/3
+        encode_tuple => fun encode_tuple/2,
+        encode_pid => fun encode_unknown/2,
+        encode_port => fun encode_unknown/2,
+        encode_reference => fun encode_unknown/2,
+        encode_term => fun encode_unknown/2
     },
     euneus:encode_to_iodata(Term, Options).
 
@@ -138,18 +141,15 @@ encode_tuple(T, _Opts) ->
         <<"_list">> => tuple_to_list(T)
     }).
 
-% jsx_error(throw, {{token, Token}, Rest, Opts, Input, Pos, Buffer}, _Stacktrace) ->
-%     ?LOG_ERROR(#{
-%         in => jsxrecord,
-%         text => <<"Error mapping value to JSON">>,
-%         result => error,
-%         reason => json_token,
-%         token => Token
-%     }),
-%     Replacement = null,
-%     euneus_decoder:resume(Token, Replacement, Rest, Opts, Input, Pos, Buffer);
-% jsx_error(Class, Reason, Stacktrace) ->
-%     euneus_decoder:handle_error(Class, Reason, Stacktrace).
+encode_unknown(Term, _State) ->
+    ?LOG_WARNING(#{
+        in => jsxrecord,
+        text => <<"Error mapping value to JSON - replaced with 'null'">>,
+        result => error,
+        reason => json_token,
+        token => Term
+    }),
+    <<"null">>.
 
 reconstitute_records(Acc, OldAcc) ->
     MaybeRecord = case maps:from_list(Acc) of

test/jsxrecord_SUITE.erl

@@ -39,7 +39,8 @@ all() ->
         times,
         proplist,
         record_proplist,
-        mixed_list
+        mixed_list,
+        unknown_term
     ].
 
 %%--------------------------------------------------------------------
@@ -132,6 +133,11 @@ mixed_list(_Config) ->
     [ match = re:run(JSON, RE, [{capture, none}]) || RE <- E ],
     ok.
 
+unknown_term(_Config) ->
+    <<"null">> = encode(self()),
+    <<"null">> = encode(make_ref()),
+    <<"[null,1,null]">> = encode([ make_ref(), 1, self() ]).
+
 %%--------------------------------------------------------------------
 %% SUPPORT FUNCTIONS
 %%--------------------------------------------------------------------