]> On Thu, Oct 23, 2003 at 12:37:37PM +0200, Alex Baretta wrote: > I am unable to get the following code to compile. > > class xcaml_conf : ?string -> ?xcaml_configuration -> > Netcgi_types.cgi_activation -> > object > method config : xcaml_configuration > method cgi : # Xcaml_cgi.xcaml_cgi_activation > method mem : Parse_config.varname -> bool > method argument_value : Parse_config.varname -> string > end > Probably better to ask in: > Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Your syntax is wrong: your code is a module interface (ie a signature). Syntax is similar to declaration of functional types. The following example compile and works as expected: (**** file test.mli *****) class class_with_option : ?name: string -> int -> object method print: unit method descr: string end;; (**** end of file test.mli ****) Compile it with ocamlc -c -g test.mli (**** file test.ml ****) class class_with_option ?(name="??") num = object val _num : int = num method print = Printf.printf "in class_with_option name=%S num=%d\n%!" name _num method descr = Printf.sprintf "<class_with_option name=%S num=%d>" name _num method private othermeth = _num + 1 end;; let c1 = new class_with_option ~name: "obj_1" 1;; let c2 = new class_with_option 2;; c1#print;; c2#print;; (**** end of test.ml ******) Compile it with ocamlc -c -g test.ml -o _test and run it with _test. In a few words, code your interface with: class xcaml_conf : ?name: string -> ?config: xcaml_configuration -> Netcgi_types.cgi_activation -> object method config : xcaml_configuration method cgi : # Xcaml_cgi.xcaml_cgi_activation method mem : Parse_config.varname -> bool method argument_value : Parse_config.varname -> string end An additional hint is: avoid reusing names from Pervasives (like int) as optional labels. Even if it is permitted, I believe it is errorprone. Regards. -- Basile STARYNKEVITCH -- basile dot starynkevitch at inria dot fr Project cristal.inria.fr - http://cristal.inria.fr/~starynke --- all opinions are only mine ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners