At Sat, 21 Apr 2012 15:32:15 -0400, Chad Albers wrote:
> Otherwise, I
> just don't understand what the use-case is for adding the port property to
> the struct. Might as well just assign one of the struct's fields to be a
> port, rather than the ceremony of setting a property on the struct.
Occas
Interesting...that worksbut in this case, the struct is purely a port,
since it has no other fields. an-i is not really an instance of a struct
i, but a definition that returns the value of an instance of a struct that
takes as its sole field value a port. IOW, it doesn't take as its only
fi
How about
#lang racket
(struct i (x) #:property prop:input-port 0)
(define (an-i str) (i (open-input-string str)))
(read (an-i "hello")) ;; yields 'hello
?
On Sat, Apr 21, 2012 at 9:43 AM, Chad Albers wrote:
> I was thinking more along the lines of:
>
> #lang racket
> (struct i (x) #:property
I was thinking more along the lines of:
#lang racket
(struct i (x) #:property prop:input-port 0)
(define an-i (i "hello"))
(read an-i) ;; yields 'hello
I know this doesn't work. IOW, the read operation actually has accesses to
a field inside the struct itself. If that's impossible, then I'm try
On Apr 21, 2012, at 11:52 AM, Chad Albers wrote:
> Hi,
>
> I'm looking for an example of treating a struct like a port, which appears to
> be possible:
> http://docs.racket-lang.org/reference/portstructs.html?q=struct#(def._((quote._~23~25kernel)._prop~3ainput-port))
>
> Apparently, this is a
Hi,
I'm looking for an example of treating a struct like a port, which appears
to be possible:
http://docs.racket-lang.org/reference/portstructs.html?q=struct#(def._((quote._~23~25kernel)._prop~3ainput-port))
Apparently, this is a lot easier that using make-custom-port. What I
would like to do
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