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Re: [Chicken-hackers] basic question regarding interfaces

From: Martin Schneeweis
Subject: Re: [Chicken-hackers] basic question regarding interfaces
Date: Fri, 6 Jul 2018 20:55:02 +0200

Hi Felix,

thank's for your reply.

> Drop the "export" from your "define-interface" forms

I could have sworn that I started my journey without the "export".

Anyway - both problems persists - may I please ask you to take a second
look if I make another error?

Module that implements two interfaces (chicken 5) - the module compiles,
but "some-b" is not visible outside. (And the compiler does not even
complain if I remove the implementation of "some-b" - nothing changes
by the way if I change the export to "(interface: iface-a iface-b)"

  (define-interface iface-a (some-a))
  (define-interface iface-b (some-b))
  (module two-ifaces (
      (interface: iface-a)
      (interface: iface-b))
    (import scheme (chicken base))
    (define some-a (lambda ()
      (print "a")))
    (define some-b (lambda ()
      (print "b"))))

And here is a module with an extra export where "extra-a" is not visible
outside the module (to make it visible the "extra-a" and
"(interface: iface-a)" have to change place):

  (define-interface iface-a (some-a))
  (module one-extra-iface-wrong (
      (interface: iface-a)
    (import scheme (chicken base))
    (define extra-a (lambda ()
      (print "extra a")))
    (define some-a (lambda ()
      (print "a"))))


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