[E-Lang] Immutable map operations

[Mark S. Miller]

At 11:00 PM Sunday 4/1/01, Mark S. Miller wrote:
>(MarcS's 
>suggested ":pbc", which stands for PassByConstruction, would have worked in 
>this case, although pbc objects are necessarily immutable.

Oops.  Parity error.  That should be

    although pbc objects *aren't* necessarily immutable

Most pbc are actually of the subtype PassByCopy, which is necessarily 
immutable, but isn't yet supported correctly.


        Cheers,
        --MarkM