Class Identity-Ordering-Mixin
A mixin class for classes whose instances will be used in FSet collections,
and for which the appropriate equivalence relation is identity (eq).
This is the right choice for the vast majority of mutable classes.
Slot
| next-serial-number | Initform:'0; Allocation:class. |
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| serial-number | |
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Direct Method
| compare | Returns one of :less, :greater, :equal, or :unequal according as x
is less than, greate... |
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