Did you mean to provide foo:
#lang racket (define-signature foo^ (make-foo foo?)) (provide foo^)
Also you can use racket/signature like this:
#lang racket/signature make-foo foo?
and then
#lang racket/unit (require "sig.rkt") (import) (export sig^) (define-struct foo ())
On Jul 26, 2010, at 1:55 PM, Shriram Krishnamurthi wrote:
Here's the file "sig": #lang racket (define-signature Foo (make-foo foo?)) Here's another file: #lang racket/unit (require "sig") (import) (export Foo) (define-struct foo ()) When I execute this, I get define-unit: unknown signature in: Foo I would have thought that the the signature is precisely what the (require "sig") line would have imported. I must be missing something in the grammar -- anyone? Shriram _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
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