References
References are denoted with a reference token.
let variable = &expression
There are two types of references:
Unique
Shared
Unique references are denoted with a unique token in front of the reference token.
let variable = ~&expression
References may also appear in type ascriptions.
let variable: &Type = &expression
Dereference
References can be dereferenced with the dereference operator.
let reference = &expression
let variable = *reference
This accesses the value that the reference is referencing.
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