Slots := Object clone.
The slots object is a singleton object, like the parents object, which allows runtime access to an object’s slots, using either predetermined or runtime symbol names.
Slots toString := "Slots".
Slots hold (object, symbol).Returns the value of the given slot on object. If the result is a
method, it is not called. Note that this method may result in a call
to missing if the slot is not found through the standard full
retrieval.
Slots get (object, symbol).Returns the value of the given slot on object. If the result is a
method, it is called with object as the caller. As such, if symbol
is a literal, this is equivalent to simply invoking the method with no
arguments using the usual syntax.
Slots put (object, symbol, value).Sets the value of the given slot on object. If the symbol is a
literal value, this is equivalent to simply using the colon-equals
assignment.
Slots delete (object, symbol).If a slot with name symbol exists on object directly, then this
method deletes that slot. Note that this only removes direct slots and
does not interfere with slots from a parent class. This method always
returns the nil object.
Slots has? (object, symbol).Returns whether or not the slot exists on the object. Specifically,
this method attempts to access the slot using Slots hold. If
the access is successful, the return value is true. If the access
attempt throws a SlotError, the return value is false. Any other
exceptions or thrown objects are propogated.
Slots protect (object, slotName, prot).Adds protection to the given slot on the supplied object. prot
should be a list of Protection instances specifying the
protection(s) to apply. If the slot does not exist, a SlotError is
raised.
Slots protected? (object, slotName).Returns whether the given slot on the supplied object has any protections applied to it.
Slots hasProtection? (object, slotName, prot).Returns whether the given slot on the supplied object has the given
protection(s) applied to it, where prot is a list of Protection
instances.
Protection := Enumeration clone.
Used in the protection interface is the Protection enumeration
object, defining the values Assign and Delete.
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