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Clarify difference between Copy & Clone traits

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Marcello 2021-11-24 21:42:44 +01:00 • committed by GitHub
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@ -368,6 +368,9 @@ When a variable goes out of scope, Rust calls the special function `drop`, where
Rust has a special annotation called the `Copy` trait that it's placeable on types that are stored on the stack.
If a type has the `Copy` trait, an older variable is still usable after assignment.
Copies happen implicitly, for example as part of an assignment `y = x`. The behavior of `Copy` is not overloadable; it is always a simple bit-wise copy.
Cloning is an explicit action, `x.clone()`. The implementation of Clone can provide any type-specific behavior necessary to duplicate values safely.
Rust won't allow to annotate a type with the `Copy` trait if the type, or any of its parts, has implemented the `Drop` trait.
```rs