默认情况下，Rust中的共享引用不允许突变，Rc也不例外：通常无法获得对Rc内部内容可变引用。Arc在这方面与Rc相同。您需要使用Mutex或RwLock（或atomics）来更改其内容。
IList<mutable_struct>对mutable_struct[] 、 好的,让我们有一些代码:ValueType[] good = new ValueType[1];IList<ValueType> bad = new ValueType[1];{ 浏览0提问于2014-09-26得票数7 回答已采纳 1回答 collection.mutable.OpenHashMap vs collection.mutable.HashMap ...
Contributor cyrgani commented Jul 3, 2024 • edited by rustbot Code struct X(u32); impl X { fn f(&mut self) { generic(self); self.0 += 1; } } fn generic<T>(_x: T) {} Current output error[E0382]: use of moved value: `self` --> src/lib.rs:6:9 | 4 | fn f(&...
Code struct MyStruct { foo: Option<UndefinedType>, } impl MyStruct { pub const EMPTY_REF: &'static Self = &Self::EMPTY; pub const EMPTY: Self = Self { foo: None, }; } Current output error[E0412]: cannot find type `UndefinedType` in this ...
This code works on stable, but not latest nightly #[derive(Copy, Clone)] pub struct S<T>(T); #[doc(hidden)] pub trait DynTrait { type VTable: Copy + 'static; const VTABLE: &'static Self::VTable; } impl<T: DynTrait> DynTrait for S<T> { ty...