error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable -->src/main.rs:37:14 | 35 | let r1 = &s; // no problem | -- immutable borrow occurs here 36 | let r2 = &s; // no problem 37 | let r3 = &mut s; // BIG PROBLEM | ^^^ mutable borro...
Compiling hello_cargo v0.1.0(/Users/zerun.dong/code/rusttest/hello_cargo)error[E0502]:cannot borrow`a`asimmutable because it is also borrowedasmutable-->src/main.rs:4:25|3|leta_ref=&mut a;|---mutable borrow occurs here4|println!("a is {}",a);|^immutable borrow occurs here5|a_r...
error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable--> src/main.rs:18:516 | let word = first_word(&s);-- immutable borrow occurs here17 | 18 | s.clear(); // error!^^^ mutable borrow occurs here19 | 20 | println!("the first word is: {}"...
leta=Box::new(1);// Owned by aletb=a;// Now owned by bprintln!("{}",a);// Error: value borrowed here after moveletc=&mut a;letd=&a;println!("{}, {}",c,d);// Error: cannot borrow `a` as immutable because it is also borrowed as mutable ...
error[E0502]: cannot borrow `a` as immutable because it is also borrowed as mutable --> src/main.rs:4:19 | 3 | let b: &i32 = &*(&mut a); | --- mutable borrow occurs here 4 | let c: &i32 = &a; | ^^ immutable borrow occurs here 5 | dbg...
error[E0502]: cannot borrow `a` as immutable because it is also borrowed as mutable --> src/main.rs:4:25 | 3 | let a_ref =&muta; | --- mutable borrow occurs here 4 | println!("a is {}", a); | ^ immutable borrow occurs here 5 |...
cannot borrow `s` as mutable because it is also borrowed as immutable --> src/main.rs:6:14 | 4 | let r1 = &s; // no problem | -- immutable borrow occurs here 5 | let r2 = &s; // no problem 6 | let r3 = &mut s; // BIG PROBLEM | ^^^ mutable borrow occurs here 7...
}// 删除节点slow.as_mut().unwrap().next = slow.as_mut().unwrap().next.as_mut().unwrap().next.take(); head.unwrap().next } } 看起来不错?但是当我们按下了运行按钮时,我们就会发现Rust拒绝了我们的代码: Line30, Char24: cannot borrow `head`asimmutable because itisalso borrowedasmutable...
error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable --> src/main.rs:6:14 | 4 | let r1 = &s; // no problem | -- immutable borrow occurs here 5 | let r2 = &s; // no problem 6 | let r3 = &mut s; // BIG PROBLEM ...
len(); // 错误 Cannot borrow `*r1` as immutable because it is also borrowed as mutable println!("{}", l); r2.push('2'); r1.push('3'); // 错误 Cannot borrow `*r1` as mutable more than once at a time println!("{:?}", r1); // 错误 Cannot borrow `r1` as immutable ...