You are the wrong version of camlp4 (the different campl4 binaries load different libraries, syntaxes etc...). If you switch camlp4orf to camlp4o your code should compile fine. Also note that I would recommend using the excellent ocamlfind tool:
ocamlfind c -linkpkg -package sexplib,sexplib.syntax -syntax camlp4o main.ml Till On Wed, Mar 7, 2012 at 12:28 PM, Matej Košík <5764c029b688c1c0d24a2e97cd7...@gmail.com> wrote: > Hi Markus, > > On 03/07/2012 05:10 PM, Markus Mottl wrote: >> On Wed, Mar 7, 2012 at 11:44, Matej Košík >> <5764c029b688c1c0d24a2e97cd7...@gmail.com> wrote: >>> I have found one (I guess unnecessary) disadvantage over `deriving'. >>> If you process your *.ml file with sexplib/bin_prot preprocessor, you >>> have to append "with ..." suffix to every type definition, otherwise you >>> will get a an error report from the preprocessor. `Deriving' does not >>> force you to do that. You can annotate only those type definitions, >>> which for you makes sense to annotate. >> >> I'm not sure what the perceived problem is, but there should be no >> need to annotate all type definitions. It should suffice to annotate >> those for which converters are needed. > > The following artificial example: > > open Sexplib.Conv > type foo = int * int with sexp > type bar = float * float with sexp > > is compilable > > (e.g.: > ocamlc -o main -pp "camlp4of -I > /home/mkosik/lib/godi/lib/ocaml/std-lib/../pkg-lib/sexplib -I > /home/mkosik/lib/godi/lib/ocaml/std-lib/../pkg-lib/type-conv > pa_type_conv.cma pa_sexp_conv.cma" -I > /home/mkosik/lib/godi/lib/ocaml/std-lib/../pkg-lib/sexplib -I > /home/mkosik/lib/godi/lib/ocaml/std-lib/../pkg-lib/type-conv unix.cma > nums.cma bigarray.cma sexplib.cma main.ml > ) > > If you remove any of the "with sexp" clauses, you will get a > preprocessor error: > > File "main.ml", line 4, characters 18-23: > Parse error: "with" expected after [type_declaration] (in [str_item]) > File "main.ml", line 1, characters 0-1: > > This is at least what I am experiencing. > >> This, of course, means that >> any types that a type definition is referring to will also need >> annotations (or hand-written conversion functions). > > Regards, > > Matej Kosik > > -- > Caml-list mailing list. Subscription management and archives: > https://sympa-roc.inria.fr/wws/info/caml-list > Beginner's list: http://groups.yahoo.com/group/ocaml_beginners > Bug reports: http://caml.inria.fr/bin/caml-bugs > -- Caml-list mailing list. Subscription management and archives: https://sympa-roc.inria.fr/wws/info/caml-list Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
