| -- 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...
当所有权发生转移时,我们就说变量的值被移动了。如果变量的值移动之后还使用它,那么会报错:value used here after move;如果变量的值移动之后还获取它的引用借给别人,那么也会报错:value borrowed here after move。 但即便如此,由于大部分完全分配在栈上的数据都是可 Copy 的,为了方便理解,我们仍可以把所有权简单...
| -- move occurs because `v1` has type `Vec<&str>`, which does not implement the `Copy` trait 9 | let v2 =v1; | -- value moved here 10 | println!("{:?}",v1); | ^^ value borrowed here after move | v1 拥有堆上数据的所有权。(每次只能有一个变量对堆上数据有所有权) v2...
^^ value borrowed here after moveFor more information about this error, try `rustc --explain E0382`.error: could not compile `ownership` due to previous error如果你在其他语言中听说过术语 浅拷贝(shallow copy)和 深拷贝(deep copy),那么拷贝指针、长度和容量而不拷贝数据可能听起来像浅拷贝。不过...
| ^^ value borrowed here after move For more information about this error, try `rustc --explain E0382`. error: could not compile `ownership` due to previous error 如果你在其他语言中听说过术语浅拷贝(shallow copy)和深拷贝(deep copy),那么拷贝指针、长度和容量而不拷贝数据可能听起来像浅拷贝。
| ^^^ value borrowed here after move error: aborting due to previous error For more information about this error, try 'rustc --explain E0382'. error: could not compile 'ch1-cereals'. 清单1.4(参见ch1/ch1-race/src/main.rs文件)展示了一个Rust防止数据竞态条件的示例。之所以会出现这种情况,是...
("{}, world!", s1); | ^^ value borrowed here after move error: aborting due to previous error For more information about this error, try `rustc --explain E0382`. error: could not compile `ownership` 解析:String的所有权从s1转移到s2后,不能再使用s1访问数据。否则违反原则2。 然而,对于...
| ^^^ value borrowed here after move 现在当涉及到Heap堆时,所有权的概念将更加透明。 当变量value_for_i传递给函数lets_change_the_value_of_string时,编译器在Stack栈中创建了一个变量引用的副本,并将所有权转移到它。 Heap堆中的值没有发生任何变化。一旦控制权回到main(),变量value_for_i的引用就不存...
^^ value borrowed here after move// |// = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)// help: consider cloning the value if the performa...