Ok, thank you. Is struct->vector the best way to access fields positionally?
On Wed, Dec 10, 2014 at 7:30 AM, Matthew Flatt <[email protected]> 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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