| -- move occurs because `s1` hastype`String`,whichdoes not implement the `Copy` trait 4 |lets2 = s1; | -- value moved here 5 | 6 | println!("{}, world!", s1); | ^^ value borrowed here after move | = note: this error originatesinthe macro `$crate::format_args_nl` (in...
| -- move occurs because `s1` has type `String`, which does not implement the `Copy` trait 4 | let s2 = s1; | -- value moved here 5 | 6 | println!("{}, world!", s1); | ^^ value borrowed here after move | = note: this error originates in the macro `$crate::format_a...
Copy trait的实现存在一些限制。只有当结构的组件都未实现Drop trait时，结构才能实现Copy trait。由于Str...
["udon".to_string(),"ramen".to_string(),"soba".to_string()];|- move occurs because`s`hastype`Vec<String>`, which does not implement the`Copy`trait3|lett=s;|- value moved here4|letu=s;|^ value used here after move|help: consider cloning the valueifthe performance cost is accept...
Compiling ownership v0.1.0(file:///projects/ownership)error[E0382]:borrowofmoved value:`s1`-->src/main.rs:5:28|2|lets1=String::from("hello");|--move occurs because`s1`has type`String`,which does not implement the`Copy`trait3|lets2=s1;|--value moved here4|5|println!("{}, world...
2 | let s1=String::from("hello"); | -- move occurs because `s1` has type `std::string::String`, which does not implement the `Copy` trait 3 | let s2=s1; | -- value moved here 4 | println!("s1={},s2={}",s1,s2); ...
error[E0382]:borrowofmoved value:`s`-->src/main.rs:8:20|6|lets=String::from("Hello World!");|-move occurs because`s`has type`String`,which does not implement the`Copy`trait7|echo(s);|-value moved here8|println!("{}",s);|^value borrowed here after move ...
| -- move occurs because `s1` has type `String`, which does not implement the `Copy` trait 3 | let s2 = s1; | -- value moved here 4 | println!("{}, world!", s1); | ^^ value borrowed here after move 这是Rust中的所有权的概念,当 let s1 这行代码执行后,后面就不再有 s1 ...
| --- move occurs becausephas typePoint, which does not implement theCopytrait 12 | p.x += 1; 13 | f2(p); | - value moved here 14 | println!("{},{}", p.x, p.y); | ^^^ value borrowed here after move | = note: this error originates in the macro$crate::format_args_...
结构可以是Copy,而i32是Copy,因此Point有资格成为Copy。相比之下,考虑 structPointList{points: Vec<Point>, } 结构PointList无法实现Copy,因为Vec<T>不是Copy。如果我们尝试派生Copy实现,我们会得到一个错误: the trait `Copy` maynotbe implementedforthistype; field `points` doesnotimplement `Copy` ...