[racket] Run-time record access

Ok, thank you.

Is struct->vector the best way to access fields positionally?

On Wed, Dec 10, 2014 at 7:30 AM, Matthew Flatt <mflatt at cs.utah.edu> wrote:

> Currently, the run-time representation of a struct doesn't include
> field names. In that sense, field names don't exist at run time, and
> all fields are accessed by position.
>
> We plan to change the structure-type core to add field names, but it
> hasn't happened, yet.
>
> At Wed, 10 Dec 2014 04:36:50 -0500, Benjamin Greenman wrote:
> > I'm hoping to implement the following function to access arbitrary struct
> > fields.
> >
> > ;; Compute `[st]-field-name st`, where
> > ;; [st] is the name of the struct type of `st`
> > (define (runtime-get st field-name)
> >   (-> struct? string? any/c)
> >   (error "not implemented"))
> >
> > Is this possible? I fear I can't use a macro because I don't know exactly
> > which struct I'll get at runtime.
> > ____________________
> >   Racket Users list:
> >   http://lists.racket-lang.org/users
>
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