Re: [racket-users] transparency of structs?

[Ben Greenman]

I see the same results on Racket 7.0 and 6.5, so I don't think
anything has changed.

Maybe the trouble is that (make-inspector) makes a subinspector of
(current-inspector), which has the same value for both the main module
& the submodules.

Switching to (make-sibling-inspector) causes (struct? an-s) to return #f

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Re: [racket-users] no TR support for streams?

[Alex Knauth]

> On Sep 6, 2019, at 1:04 PM, 'John Clements' via Racket Users 
>  wrote:
> 
> Perhaps I just don’t know how to search the racket docs correctly, but IIUC 
> there’s no support for Streams in the current TR implementation? I just want 
> to use stream-cons, empty-stream, stream-first, and stream-rest. I guess the 
> easy workaround is just to use thunks to roll my own stream, but I’m 
> wondering if I’m missing something obvious?

You can wrap `stream-cons`, etc. in contracts and keep the original stream data 
type, but it's trickier than wrapping a normal function, and involves:
 - an untyped file which imports the macros and exports "function-ized" 
versions of the macros
 - a typed file which imports those function-ized things with require/typed, 
then exports new versions of the macros in terms of the functions

And looks something like like these two files:
; untyped-stream-function-ized.rkt
#lang racket
(provide stream-cons/fn)
(require racket/stream)
(define (stream-cons/fn a b)
  (stream-cons (a) (b)))

; typed-stream.rkt
#lang typed/racket
(provide stream-cons)
(require/typed "untyped-stream-function-ized.rkt"
  [stream-cons/fn (All (a) (-> (-> a) (-> (Sequenceof a)) (Sequenceof a)))])
(define-simple-macro (stream-cons a b)
  (stream-cons/fn (thunk a) (thunk b)))

This is the strategy I used for my `typed-racket-stream` repository:
https://github.com/AlexKnauth/typed-racket-stream 


I wanted to do this instead of "rolling my own" stream library because I wanted 
to be able to share the same stream data-structure as existing untyped racket 
files.

Alex Knauth

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Re: [racket-users] [ANN] Racket-on-ChezScheme docker images now available

[Sage Gerard]

Super exciting news. Thank you for sharing!

 Original Message 
On Sep 7, 2019, 2:42 PM, Jack Firth wrote:

> Thanks to the [hard work of Bogdan 
> Popa](https://github.com/jackfirth/racket-docker/pull/34), you can now run 
> Racket-on-ChezScheme inside docker containers using the 
> [jackfirth/racket](https://hub.docker.com/r/jackfirth/racket/) DockerHub 
> repository. The ChezScheme image variants are tagged as 
> jackfirth/racket:{version}-cs or jackfirth/racket:{version}-cs-full, 
> depending on whether you want the minimal installation of Racket or the full 
> installation. For example, this command:
>
>   docker run -it jackfirth/racket:7.4-cs
>
> ...will pull the minimal Racket-on-ChezScheme 7.4 image and run a REPL inside 
> it. Note that running on ChezScheme is only possible for version 7.4 and 
> above. For more information about the Racket images, see the 
> [jackfirth/racket-docker](https://github.com/jackfirth/racket-docker) GitHub 
> repository.
>
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[racket-users] [ANN] Racket-on-ChezScheme docker images now available

[Jack Firth]

Thanks to the hard work of Bogdan Popa 
, you can now run 
Racket-on-ChezScheme inside docker containers using the jackfirth/racket 
 DockerHub repository. The 
ChezScheme image variants are tagged as jackfirth/racket:{version}-cs or 
jackfirth/racket:{version}-cs-full, depending on whether you want the 
minimal installation of Racket or the full installation. For example, this 
command:

  docker run -it jackfirth/racket:7.4-cs

...will pull the minimal Racket-on-ChezScheme 7.4 image and run a REPL 
inside it. Note that running on ChezScheme is only possible for version 7.4 
and above. For more information about the Racket images, see the 
jackfirth/racket-docker  GitHub 
repository.

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