Symbols, Protocols, Frames, and Versioning

Allen Wirfs-Brock allen at
Thu Oct 4 13:18:36 PDT 2012

Presumably, this concern would also apply to associating programmer supplied debug info with symbols

"Mark S. Miller" <erights at> wrote:

>On Thu, Oct 4, 2012 at 11:41 AM, Allen Wirfs-Brock <allen at> wrote:
>Note that in most cases, you want to look up an already interned symbol name rather than intern a new one. 
>One of the beautiful things about interning is that it is a pure function, and so does not provide a communications channel. If one frame could test whether some other frame somewhere had already interned a given name, you'd have an unpluggable cross-frame communications channel.
>    Cheers,
>    --MarkM
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