Erik de Castro Lopo wrote: > Hi all, > > Mostly out of curiosity, I'm having a look at the efuns Emacs > clone written in Ocaml: > > http://pauillac.inria.fr/cdrom/prog/unix/efuns/eng.htm > > and trying to compile it with a recent Ocaml compiler like 3.10.2. > >>From the files, it seems that the last version of Ocaml this code > compiled with was 3.01 (around the year 2000?). I've managed to find > fixes for a bunch of problems. > > One of those problems was that one of the files (common/options.ml) > had code like this: > > open Genlex > > let lexer = make_lexer [ "=" ; "{" ; "}"; "["; "]"; ";" ; "("; ")"; ","; > "."] > > let rec parse_gwmlrc = parser > [< id = parse_id; 'Kwd "="; v = parse_option ; > eof = parse_gwmlrc >] -> (id, v) :: eof > | [< >] -> [] > > which the current compiler complained about "[<". A bit of googling > suggested that this was in fact camlp4 source code. Sure enough, > renaming that file to pa_options.ml and running it throught camlp4 > resulted in a file that the standard compiler digested quite happily. > > I've now come to another file gwml/afterstep.mll that seems to be > ocamllex source code but again has these camlp4 like extensions. > Unfortunately camlp4 doesn't like this file, probably because it > has ocamllex syntax instead of ocaml syntax. > > So, I have two questions : > > 1) Did early versions of ocaml (say up to and including 3.01) handle > constructs like those above that were later removed and and added > to camlp4 instead?
Exactly. The 3.10 manual says: 7.2 Streams and stream parsers The syntax for streams and stream parsers is no longer part of the Objective Caml language, but available through a Camlp4 syntax extension. See the Camlp4 reference manual for more information. Support for basic operations on streams is still available through the Stream[Stream] module of the standard library. Objective Caml programs that use the stream parser syntax should be compiled with the -pp camlp4o option to ocamlc and ocamlopt. For interactive use, run ocaml and issue the #load "camlp4o.cma";; command. > 2) Any suggestions on how to handle the camlp4 syntax stuff in an > ocamllex source file? Obviously, this code could be extracted > and placed in its own file but I'm open to other suggestions. I don't know. Have you tried ocamllex followed by camlp4? Martin -- http://mjambon.com/ _______________________________________________ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
