mirror of https://github.com/rust-lang/rust
50 lines
1.7 KiB
Plaintext
50 lines
1.7 KiB
Plaintext
error[E0631]: type mismatch in function arguments
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--> $DIR/fn-variance-1.rs:11:15
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LL | fn takes_mut(x: &mut isize) { }
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| --------------------------- found signature defined here
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...
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LL | apply(&3, takes_mut);
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| ----- ^^^^^^^^^ expected due to this
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| |
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| required by a bound introduced by this call
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= note: expected function signature `fn(&{integer}) -> _`
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found function signature `fn(&mut isize) -> _`
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note: required by a bound in `apply`
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--> $DIR/fn-variance-1.rs:5:37
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LL | fn apply<T, F>(t: T, f: F) where F: FnOnce(T) {
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| ^^^^^^^^^ required by this bound in `apply`
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help: consider wrapping the function in a closure
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LL | apply(&3, |x| takes_mut(&mut *x));
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| +++ +++++++++
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error[E0631]: type mismatch in function arguments
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--> $DIR/fn-variance-1.rs:15:19
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LL | fn takes_imm(x: &isize) { }
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| ----------------------- found signature defined here
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...
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LL | apply(&mut 3, takes_imm);
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| ----- ^^^^^^^^^ expected due to this
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| |
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| required by a bound introduced by this call
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= note: expected function signature `fn(&mut {integer}) -> _`
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found function signature `fn(&isize) -> _`
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note: required by a bound in `apply`
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--> $DIR/fn-variance-1.rs:5:37
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LL | fn apply<T, F>(t: T, f: F) where F: FnOnce(T) {
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| ^^^^^^^^^ required by this bound in `apply`
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help: consider wrapping the function in a closure
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LL | apply(&mut 3, |x| takes_imm(&*x));
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| +++ +++++
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0631`.
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