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...
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(&...
1; } // Fails fn box_destructure(v: &mut Box<(i32, i32)>) { let (ref mut _head, ref mut _tail) = **v; } // My own smart pointer struct Wrap<T>(T); impl<T> Deref for Wrap<T> { type Target = T; fn deref(&self) -> &T { &self.0 } } impl<T> DerefMut for ...
Just speaking as a user, who happened to find this bug: I'm very excited about the fix, but also I am nervous about the noalias optimizations being in Rust 1.53.0. I didn't find this bug intentionally. It was 100% an accident; i.e. pure luck. I know a lot of people are doing...
0 } } struct Bar(Foo); impl Bar { fn baz(&mut self) { match *self.0 { X::A(ref mut i) => { *i += 1; } X::B => { self.fail(); } } } fn fail(&mut self) {} } fn main() { Bar(Foo(X::A(0))).baz(); } $ rustc test.rs error[E0499]: cannot borrow ...
usestd::{fs,io::*};usestd::collections::HashMap;typeHandle=BufWriter<fs::File>;structThing(HashMap<String,Handle>);implThing{pubfndie_horribly(&mutself){forvinself.0.values(){v.flush();}}}fnmain(){} It could probably be reduced in size further but I'm not much of a Rust exper...
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...