--> $DIR/borrowck-unboxed-closures.rs:3:5
|
LL | let g = &mut f;
- | - mutable borrow occurs here
+ | ------ mutable borrow occurs here
LL | f(1, 2);
| ^ immutable borrow occurs here
LL | use_mut(g);
-LL | }
- | - mutable borrow ends here
+ | - mutable borrow later used here
-error[E0596]: cannot borrow immutable argument `f` as mutable
+error[E0596]: cannot borrow `f` as mutable, as it is not declared as mutable
--> $DIR/borrowck-unboxed-closures.rs:7:5
|
LL | fn b<F:FnMut(isize, isize) -> isize>(f: F) {
- | - help: make this binding mutable: `mut f`
+ | - help: consider changing this to be mutable: `mut f`
LL | f(1, 2);
- | ^ cannot borrow mutably
+ | ^ cannot borrow as mutable
error[E0382]: use of moved value: `f`
--> $DIR/borrowck-unboxed-closures.rs:12:5
|
+LL | fn c<F:FnOnce(isize, isize) -> isize>(f: F) {
+ | -- - move occurs because `f` has type `F`, which does not implement the `Copy` trait
+ | |
+ | help: consider adding a `Copy` constraint to this type argument: `F: Copy +`
LL | f(1, 2);
| - value moved here
LL | f(1, 2);
| ^ value used here after move
- |
- = note: move occurs because `f` has type `F`, which does not implement the `Copy` trait
error: aborting due to 3 previous errors
-Some errors occurred: E0382, E0502, E0596.
+Some errors have detailed explanations: E0382, E0502, E0596.
For more information about an error, try `rustc --explain E0382`.