OK, OK, just so I can get it off my chest:
- introduce '@' as a prefix operator meaning 'freeze'.
- [1, 2, 3] is a mutable sequence (our old friend the list)
- {1, 2, 3} is a mutable set
- @{1, 2, 3} is an immutable set (i.e., a frozen set --- frozen
at creation, so all current optimizations possible)
- @[1, 2, 3] is an immutable sequence (i.e., a tuple)
Now, if only I can figure out whether "@x" means "bind the name x
permanently to its current value to create a symbolic constant" or "freeze
the object to which x currently refers"... ;-)
Thanks,
Greg
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