mirror of https://github.com/rust-lang/rust
126 lines
4.5 KiB
Plaintext
126 lines
4.5 KiB
Plaintext
error[E0502]: cannot borrow `x` as mutable because it is also borrowed as immutable
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:7:13
|
|
|
|
|
LL | let f = || {
|
|
| -- immutable borrow occurs here
|
|
LL | let [ref y, ref z @ ..] = x;
|
|
| - first borrow occurs due to use of `x` in closure
|
|
LL | };
|
|
LL | let r = &mut x;
|
|
| ^^^^^^ mutable borrow occurs here
|
|
LL |
|
|
LL | f();
|
|
| - immutable borrow later used here
|
|
|
|
error[E0502]: cannot borrow `x` as immutable because it is also borrowed as mutable
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:16:13
|
|
|
|
|
LL | let mut f = || {
|
|
| -- mutable borrow occurs here
|
|
LL | let [ref mut y, ref mut z @ ..] = x;
|
|
| - first borrow occurs due to use of `x` in closure
|
|
LL | };
|
|
LL | let r = &x;
|
|
| ^^ immutable borrow occurs here
|
|
LL |
|
|
LL | f();
|
|
| - mutable borrow later used here
|
|
|
|
error[E0382]: borrow of moved value: `x`
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:25:5
|
|
|
|
|
LL | fn arr_by_move(x: [String; 3]) {
|
|
| - move occurs because `x` has type `[String; 3]`, which does not implement the `Copy` trait
|
|
LL | let f = || {
|
|
| -- value moved into closure here
|
|
LL | let [y, z @ ..] = x;
|
|
| - variable moved due to use in closure
|
|
LL | };
|
|
LL | &x;
|
|
| ^^ value borrowed here after move
|
|
|
|
|
help: consider cloning the value if the performance cost is acceptable
|
|
|
|
|
LL | let [y, z @ ..] = x.clone();
|
|
| ++++++++
|
|
|
|
error[E0502]: cannot borrow `*x` as mutable because it is also borrowed as immutable
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:33:13
|
|
|
|
|
LL | let f = || {
|
|
| -- immutable borrow occurs here
|
|
LL | let [ref y, ref z @ ..] = *x;
|
|
| -- first borrow occurs due to use of `x` in closure
|
|
LL | };
|
|
LL | let r = &mut *x;
|
|
| ^^^^^^^ mutable borrow occurs here
|
|
LL |
|
|
LL | f();
|
|
| - immutable borrow later used here
|
|
|
|
error[E0501]: cannot borrow `x` as immutable because previous closure requires unique access
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:42:13
|
|
|
|
|
LL | let mut f = || {
|
|
| -- closure construction occurs here
|
|
LL | let [ref mut y, ref mut z @ ..] = *x;
|
|
| -- first borrow occurs due to use of `x` in closure
|
|
LL | };
|
|
LL | let r = &x;
|
|
| ^^ second borrow occurs here
|
|
LL |
|
|
LL | f();
|
|
| - first borrow later used here
|
|
|
|
error[E0382]: borrow of moved value: `x`
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:51:5
|
|
|
|
|
LL | fn arr_box_by_move(x: Box<[String; 3]>) {
|
|
| - move occurs because `x` has type `Box<[String; 3]>`, which does not implement the `Copy` trait
|
|
LL | let f = || {
|
|
| -- value moved into closure here
|
|
LL | let [y, z @ ..] = *x;
|
|
| -- variable moved due to use in closure
|
|
LL | };
|
|
LL | &x;
|
|
| ^^ value borrowed here after move
|
|
|
|
|
help: consider cloning the value if the performance cost is acceptable
|
|
|
|
|
LL - let [y, z @ ..] = *x;
|
|
LL + let [y, z @ ..] = x.clone();
|
|
|
|
|
|
|
error[E0502]: cannot borrow `*x` as mutable because it is also borrowed as immutable
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:59:13
|
|
|
|
|
LL | let f = || {
|
|
| -- immutable borrow occurs here
|
|
LL | if let [ref y, ref z @ ..] = *x {}
|
|
| -- first borrow occurs due to use of `x` in closure
|
|
LL | };
|
|
LL | let r = &mut *x;
|
|
| ^^^^^^^ mutable borrow occurs here
|
|
LL |
|
|
LL | f();
|
|
| - immutable borrow later used here
|
|
|
|
error[E0501]: cannot borrow `x` as immutable because previous closure requires unique access
|
|
--> $DIR/borrowck-closures-slice-patterns.rs:68:13
|
|
|
|
|
LL | let mut f = || {
|
|
| -- closure construction occurs here
|
|
LL | if let [ref mut y, ref mut z @ ..] = *x {}
|
|
| -- first borrow occurs due to use of `x` in closure
|
|
LL | };
|
|
LL | let r = &x;
|
|
| ^^ second borrow occurs here
|
|
LL |
|
|
LL | f();
|
|
| - first borrow later used here
|
|
|
|
error: aborting due to 8 previous errors
|
|
|
|
Some errors have detailed explanations: E0382, E0501, E0502.
|
|
For more information about an error, try `rustc --explain E0382`.
|