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Date: -- (:)
From: Jozef Kosoru <zyzstar@u...>
Subject: How to define submodules
Hello,

I'm trying to split my project files into several directories but I
can't figure out how to do it right.

Let's assume the following directory structure:

	Kernel/Parser/pdf.ml
	main.ml

and let's define the content of above files as:

~~~ Kernel/Parser/pdf.ml ~~~
 let init () = print_string "hello world\n";;

~~~ main.ml ~~~
 Kernel.Parser.Pdf.init ();;

~~~

OK, and then I want to compile it (within a root directory):

	$ ocamlc -c Kernel/Parser/pdf.ml
	$ ocamlc -I . Kernel/Parser/pdf.cmo main.ml -o app

	File "main.ml", line 1, characters 0-22:
	Unbound value Kernel.Parser.Pdf.init

Is this supposed to work somehow?
I know that most ocaml programs use a bit cumbersome approach and they
define long file names to emulate submodules. Eg.

	Kernel/Parser/kernel_Parser_Pdf.ml
	main.ml

~~~ main.ml ~~~
 Kernel_Parser_Pdf.init ();;

~~~

And then:

	$ ocamlc -c Kernel/Parser/kernel_Parser_Pdf.ml 
	$ ocamlc -I . -I Kernel/Parser/ \
		Kernel/Parser/kernel_Parser_Pdf.cmo \
		main.ml -o app

but that is rather inelegant.

But ANT project [1] uses this nice syntax. For
instance, there are files:

	Engine/Evaluate.ml
	Main/Main.ml

and Main.ml calls:

	let pages = Engine.Evaluate.evaluate ast ...

is it some kind of language extension? I've noticed ANT uses a revised
OCaml syntax but there is no such a thing mentioned in its documentation
[2].

Thank you for any advice. Regards,
Jozef
	 

[1] http://ant.berlios.de/
[2] http://caml.inria.fr/pub/docs/manual-camlp4/manual007.html

-- 
jozef kosoru
http://zyzstar.kosoru.com