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any
is a special type that, like unk
, allows any value. Unlike unk
, however, any
allows you to perform any operation on the value, even if the type checker would otherwise be able to prove that a given operation is incorrect.
The type of any operation on a value typed as any
is also any
. A value of type any
can be assigned to a location of any other type.
unk
should generally be preferred over any
wherever possible.
unk
is a special type that, like any
, allows any value. Unlike any
, however, unk
only allows a very limited set of operations which are safe on all values. In other words, unk
is the type-safe counterpart to any
.
A value of type unk
can only be assigned to a location of type unk
or any
.