[plt-scheme] Some questions about shared, match and types

On Mon, May 31, 2010 at 2:17 AM, Noel Welsh <noelwelsh at gmail.com> wrote:
> On Sun, May 30, 2010 at 1:03 PM, Groshev Dmitry <a2alt at yandex.ru> wrote:
>> Hello. Some newbie questions:
>> -what is the common usage of "shared"?
>
> In all my years using PLT Scheme I have never used shared. Thus I
> conclude there are no common usages.

shared is a convenient way to build a cyclic data structure, but its
most common use is probably in the REPL where it is used by some
languages to print out values.

Robby