3016f55579
- add note and suggestion for casting both expected and found fn items to fn pointers - add note for casting expected fn item to fn pointer
85 lines
3.3 KiB
Plaintext
85 lines
3.3 KiB
Plaintext
error[E0308]: `if` and `else` have incompatible types
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--> $DIR/fn-pointer-mismatch.rs:11:43
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LL | let g = if n % 2 == 0 { &foo } else { &bar };
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| ---- ^^^^ expected fn item, found a different fn item
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| |
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| expected because of this
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= note: expected reference `&fn(u32) -> u32 {foo}`
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found reference `&fn(u32) -> u32 {bar}`
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= note: different fn items have unique types, even if their signatures are the same
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= help: consider casting both fn items to fn pointers using `as fn(u32) -> u32`
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error[E0308]: mismatched types
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--> $DIR/fn-pointer-mismatch.rs:23:9
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LL | let mut a = foo;
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| --- expected due to this value
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LL | a = bar;
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| ^^^ expected fn item, found a different fn item
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= note: expected fn item `fn(_) -> _ {foo}`
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found fn item `fn(_) -> _ {bar}`
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= note: different fn items have unique types, even if their signatures are the same
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= help: consider casting both fn items to fn pointers using `as fn(u32) -> u32`
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error[E0308]: mismatched types
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--> $DIR/fn-pointer-mismatch.rs:31:18
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LL | b = Box::new(bar);
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| -------- ^^^ expected fn item, found a different fn item
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| |
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| arguments to this function are incorrect
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= note: expected fn item `fn(_) -> _ {foo}`
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found fn item `fn(_) -> _ {bar}`
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= note: different fn items have unique types, even if their signatures are the same
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note: associated function defined here
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--> $SRC_DIR/alloc/src/boxed.rs:LL:COL
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= help: consider casting both fn items to fn pointers using `as fn(u32) -> u32`
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error[E0308]: mismatched types
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--> $DIR/fn-pointer-mismatch.rs:36:29
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LL | let c: fn(u32) -> u32 = &foo;
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| -------------- ^^^^
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| | |
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| | expected fn pointer, found reference
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| | help: consider removing the reference: `foo`
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| expected due to this
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= note: expected fn pointer `fn(u32) -> u32`
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found reference `&fn(u32) -> u32 {foo}`
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error[E0308]: mismatched types
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--> $DIR/fn-pointer-mismatch.rs:42:30
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LL | let d: &fn(u32) -> u32 = foo;
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| --------------- ^^^
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| | |
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| | expected `&fn(u32) -> u32`, found fn item
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| | help: consider using a reference: `&foo`
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| expected due to this
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= note: expected reference `&fn(u32) -> u32`
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found fn item `fn(u32) -> u32 {foo}`
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error[E0308]: mismatched types
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--> $DIR/fn-pointer-mismatch.rs:48:30
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LL | let e: &fn(u32) -> u32 = &foo;
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| --------------- ^^^^
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| | |
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| | expected fn pointer, found fn item
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| | help: consider casting to a fn pointer: `&(foo as fn(u32) -> u32)`
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| expected due to this
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= note: expected reference `&fn(u32) -> u32`
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found reference `&fn(u32) -> u32 {foo}`
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= note: fn items are distinct from fn pointers
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error: aborting due to 6 previous errors
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For more information about this error, try `rustc --explain E0308`.
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