[erlang-questions] Installation of exprecs.erl

Ulf Wiger <>
Sat Jan 10 23:59:07 CET 2009


The 'undef' means that erlc can't find the file exprecs.beam.

Try adding e.g. -pa ../ebin to the erlc command line in your
Makefile (or similar, depending on how you prefer to identify
the location of exprecs.beam in the Makefile)

BR,
Ulf W

2009/1/9 Torben Hoffmann <>:
> Hi,
>
> I have put exprecs.erl into util/src/ and added it to my util/ebin/util.app
> file but when I do my make it keeps complaining about
>
> src/record_logger.erl:none: error in parse transform 'exprecs': {undef,
>                                      [{exprecs,parse_transform,
>                                        [[{attribute,1,file,
>                                           {"src/record_logger.erl",1}},
>
> {attribute,17,module,record_logger},
>                                          {attribute,1,file,
>
> {"/home/pap/subv/util-0.1/../pap_app-0.1/include/my_types.hrl",
>                                            1}},
> <snip>
>
> I have my records definded in a .hrl which is included in the module where I
> want to utilise the exprecs functionality like this:
>
> -compiler({parse_transform,exprecs}).
> -include("my_types.hrl").
>
> -export([fields/1]).
> -export_records([ % huge list with all the records from my_types.hrl that I
> want to get the field names for
>                 ]).
>
> fields(Rec) ->
>     '#info-'(fields,Rec).
>
> Have I installed exprecs incorrectly?
>
> Thanks,
> Torben
>
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