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並前往https://itfanr.gitbooks.io/rust-book-2rd-en/content/ch15-02-deref.html

The Deref Trait Allows Access to the Data Through a Reference

use std::ops::Deref; struct Mp3 { audio: Vec<u8>, artist: Option<String>, ... If we hadn't implemented the Deref trait for Mp3 , Rust wouldn't compile the ...

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