Parameters and dynamic-require

[Jens Axel Søgaard]

Hi All,

How can I set a parameter used in a dynamically required module?

Example:
A parameter `out` is defined in a module p.
Before requiring (dynamically) module a, we want to set the parameter.

The attempt below fails.

    (module p racket/base (define out (make-parameter 'original-value)) (provide out))
    (module a racket/base (require 'p) (displayln (list 'a (out))) (define a 43) (provide a))
    (require 'p)              
    (displayln (out))
    (out "foo")
    (dynamic-require ''a 'a)

The output is:
    (a original-value)
    original-value
    43

I am hoping to see (a "foo").

/Jens Axel

[Jay McCarthy]

When I run

```
#lang racket/load

(module p racket/base
(define out (make-parameter 'original-value))
(provide out))
(module a racket/base
(require 'p)
(displayln (list 'a (out)))
(define a 43)
(provide a))
(require 'p)

(displayln (list 'outer (out)))
(out "foo")
(displayln (dynamic-require ''a 'a))
```

I get

```
(outer original-value)
(a foo)
43
```

as expected

--
Jay McCarthy
Associate Professor @ CS @ UMass Lowell
http://jeapostrophe.github.io
Vincit qui se vincit.

> --
> You received this message because you are subscribed to the Google Groups "Racket Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to racket-users...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CABefVgxbZ5Jo1Gee8PCEArHSTrT9TBqcvUCZJoKB0QV3duHEgw%40mail.gmail.com.