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[Jacek Chrzaszcz <chrzaszc AT mimuw.edu.pl>]

On Wed, Feb 19, 2003 at 11:44:48AM +0100, Guillaume Dufay wrote:
> Hello,
> 
> We start playing with modules and we face the following problem. 
> Assuming we have two modules types declaration, whose one is functor type :
> 
> How do I declare a module of type bar?
> We tried the following declaration but without success.
> 

Hello,

In current implementation functor types are useful only as types of
arguments of higher order functors.

What you want is parametric module types and those are not supported yet.

A possible workaround is the following:

Module Type foo as before

Module Type bar.
  Declare Module f:foo.
  Import f.
  Parameter b:a.
End bar.


Module imp [f':foo] : bar with Module f:=f'.
  Module f:=f'.
  ....
End imp.


Jacek