Rust part15 - 暇つぶし2ch

Rust part15 ..

62:デフォルトの名無しさん
22/05/16 20:58:36.88 qW5+0T97.net
>>50
"Copyのコストが高い" は Copy を実装する行為そのもののコストが高いと解釈すべきということ？
そんなばかな
 >>52
ドキュメント読みましょうねー
URLﾘﾝｸ(doc.rust-lang.org)
> It’s important to note that in these two examples, the only difference is whether you are allowed to access x after the assignment.
> Under the hood, both a copy and a move can result in bits being copied in memory, although this is sometimes optimized away.
...
> The behavior of Copy is not overloadable; it is always a simple bit-wise copy.
...
> The implementation of Clone can provide any type-specific behavior necessary to duplicate values safely.
> For example, the implementation of Clone for String needs to copy the pointed-to string buffer in the heap.

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