mirror of https://github.com/rust-lang/rust.git
54 lines
1.9 KiB
Plaintext
54 lines
1.9 KiB
Plaintext
error[E0277]: the size for values of type `T` cannot be known at compilation time
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--> $DIR/unsized-struct.rs:6:36
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LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
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| - ^^^^^^ doesn't have a size known at compile-time
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| |
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| this type parameter needs to be `Sized`
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note: required by a bound in `Foo`
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--> $DIR/unsized-struct.rs:4:12
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LL | struct Foo<T> { data: T }
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| ^ required by this bound in `Foo`
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help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
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--> $DIR/unsized-struct.rs:4:12
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LL | struct Foo<T> { data: T }
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| ^ - ...if indirection were used here: `Box<T>`
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| |
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| this could be changed to `T: ?Sized`...
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help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
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LL + fn foo2<T>() { not_sized::<Foo<T>>() }
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error[E0277]: the size for values of type `T` cannot be known at compilation time
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--> $DIR/unsized-struct.rs:13:35
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LL | fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
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| - ^^^^^^ doesn't have a size known at compile-time
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| this type parameter needs to be `Sized`
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note: required because it appears within the type `Bar<T>`
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--> $DIR/unsized-struct.rs:11:8
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LL | struct Bar<T: ?Sized> { data: T }
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| ^^^
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note: required by a bound in `is_sized`
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--> $DIR/unsized-struct.rs:1:13
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LL | fn is_sized<T:Sized>() { }
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| ^ required by this bound in `is_sized`
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help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
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LL + fn bar2<T>() { is_sized::<Bar<T>>() }
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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