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8c3a033d7f
In order to expose edition dependent divergences in some tests in the test suite, add explicit `edition` annotations. Some of these tests might require additional work to *avoid* the divergences, as they might have been unintentional. These are not exhaustive changes, purely opportunistic while looking at something else.
309 lines
12 KiB
Plaintext
309 lines
12 KiB
Plaintext
error[E0782]: expected a type, found a trait
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:10:21
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LL | fn fuz() -> (usize, Trait) { (42, Struct) }
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| ^^^^^
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help: you can add the `dyn` keyword if you want a trait object
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LL | fn fuz() -> (usize, dyn Trait) { (42, Struct) }
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| +++
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error[E0277]: the size for values of type `(dyn Trait + 'static)` cannot be known at compilation time
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:15:13
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LL | fn bar() -> (usize, dyn Trait) { (42, Struct) }
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| ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
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= help: within `(usize, (dyn Trait + 'static))`, the trait `Sized` is not implemented for `(dyn Trait + 'static)`
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= note: required because it appears within the type `(usize, (dyn Trait + 'static))`
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= note: the return type of a function must have a statically known size
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error[E0782]: expected a type, found a trait
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:19:13
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LL | fn bap() -> Trait { Struct }
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| ^^^^^
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help: use `impl Trait` to return an opaque type, as long as you return a single underlying type
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LL | fn bap() -> impl Trait { Struct }
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| ++++
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help: alternatively, you can return an owned trait object
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LL | fn bap() -> Box<dyn Trait> { Struct }
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| +++++++ +
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error[E0746]: return type cannot be a trait object without pointer indirection
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:22:13
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LL | fn ban() -> dyn Trait { Struct }
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| ^^^^^^^^^ doesn't have a size known at compile-time
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help: consider returning an `impl Trait` instead of a `dyn Trait`
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LL - fn ban() -> dyn Trait { Struct }
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LL + fn ban() -> impl Trait { Struct }
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help: alternatively, box the return type, and wrap all of the returned values in `Box::new`
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LL | fn ban() -> Box<dyn Trait> { Box::new(Struct) }
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| ++++ + +++++++++ +
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error[E0746]: return type cannot be a trait object without pointer indirection
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:24:13
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LL | fn bak() -> dyn Trait { unimplemented!() }
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| ^^^^^^^^^ doesn't have a size known at compile-time
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help: consider returning an `impl Trait` instead of a `dyn Trait`
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LL - fn bak() -> dyn Trait { unimplemented!() }
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LL + fn bak() -> impl Trait { unimplemented!() }
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help: alternatively, box the return type, and wrap all of the returned values in `Box::new`
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LL | fn bak() -> Box<dyn Trait> { Box::new(unimplemented!()) }
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| ++++ + +++++++++ +
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error[E0746]: return type cannot be a trait object without pointer indirection
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:26:13
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LL | fn bal() -> dyn Trait {
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| ^^^^^^^^^ doesn't have a size known at compile-time
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help: consider returning an `impl Trait` instead of a `dyn Trait`
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LL - fn bal() -> dyn Trait {
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LL + fn bal() -> impl Trait {
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help: alternatively, box the return type, and wrap all of the returned values in `Box::new`
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LL ~ fn bal() -> Box<dyn Trait> {
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LL | if true {
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LL ~ return Box::new(Struct);
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LL | }
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LL ~ Box::new(42)
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error[E0746]: return type cannot be a trait object without pointer indirection
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:32:13
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LL | fn bax() -> dyn Trait {
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| ^^^^^^^^^ doesn't have a size known at compile-time
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help: consider returning an `impl Trait` instead of a `dyn Trait`
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LL - fn bax() -> dyn Trait {
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LL + fn bax() -> impl Trait {
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help: alternatively, box the return type, and wrap all of the returned values in `Box::new`
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LL ~ fn bax() -> Box<dyn Trait> {
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LL | if true {
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LL ~ Box::new(Struct)
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LL | } else {
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LL ~ Box::new(42)
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error[E0746]: return type cannot be a trait object without pointer indirection
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:67:13
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LL | fn bat() -> dyn Trait {
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| ^^^^^^^^^ doesn't have a size known at compile-time
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help: consider returning an `impl Trait` instead of a `dyn Trait`
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LL - fn bat() -> dyn Trait {
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LL + fn bat() -> impl Trait {
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help: alternatively, box the return type, and wrap all of the returned values in `Box::new`
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LL ~ fn bat() -> Box<dyn Trait> {
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LL | if true {
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LL ~ return Box::new(0);
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LL | }
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LL ~ Box::new(42)
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error[E0746]: return type cannot be a trait object without pointer indirection
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:73:13
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LL | fn bay() -> dyn Trait {
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| ^^^^^^^^^ doesn't have a size known at compile-time
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help: consider returning an `impl Trait` instead of a `dyn Trait`
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LL - fn bay() -> dyn Trait {
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LL + fn bay() -> impl Trait {
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help: alternatively, box the return type, and wrap all of the returned values in `Box::new`
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LL ~ fn bay() -> Box<dyn Trait> {
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LL | if true {
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LL ~ Box::new(0)
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LL | } else {
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LL ~ Box::new(42)
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:15:39
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LL | fn bar() -> (usize, dyn Trait) { (42, Struct) }
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| ^^^^^^ expected `dyn Trait`, found `Struct`
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= note: expected trait object `(dyn Trait + 'static)`
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found struct `Struct`
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= help: `Struct` implements `Trait` so you could box the found value and coerce it to the trait object `Box<dyn Trait>`, you will have to change the expected type as well
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error[E0277]: the size for values of type `(dyn Trait + 'static)` cannot be known at compilation time
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:15:34
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LL | fn bar() -> (usize, dyn Trait) { (42, Struct) }
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| ^^^^^^^^^^^^ doesn't have a size known at compile-time
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= help: within `(usize, (dyn Trait + 'static))`, the trait `Sized` is not implemented for `(dyn Trait + 'static)`
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= note: required because it appears within the type `(usize, (dyn Trait + 'static))`
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= note: tuples must have a statically known size to be initialized
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:41:16
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LL | fn bam() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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LL | if true {
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LL | return Struct;
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| ^^^^^^ expected `Box<dyn Trait>`, found `Struct`
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found struct `Struct`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | return Box::new(Struct);
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:43:5
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LL | fn bam() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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...
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LL | 42
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| ^^ expected `Box<dyn Trait>`, found integer
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found type `{integer}`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | Box::new(42)
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:47:16
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LL | fn baq() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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LL | if true {
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LL | return 0;
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| ^ expected `Box<dyn Trait>`, found integer
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found type `{integer}`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | return Box::new(0);
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:49:5
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LL | fn baq() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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...
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LL | 42
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| ^^ expected `Box<dyn Trait>`, found integer
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found type `{integer}`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | Box::new(42)
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:53:9
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LL | fn baz() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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LL | if true {
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LL | Struct
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| ^^^^^^ expected `Box<dyn Trait>`, found `Struct`
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found struct `Struct`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | Box::new(Struct)
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:55:9
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LL | fn baz() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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...
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LL | 42
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| ^^ expected `Box<dyn Trait>`, found integer
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found type `{integer}`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | Box::new(42)
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:60:9
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LL | fn baw() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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LL | if true {
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LL | 0
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| ^ expected `Box<dyn Trait>`, found integer
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found type `{integer}`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | Box::new(0)
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-trait-return-should-be-impl-trait.rs:62:9
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LL | fn baw() -> Box<dyn Trait> {
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| -------------- expected `Box<(dyn Trait + 'static)>` because of return type
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...
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LL | 42
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| ^^ expected `Box<dyn Trait>`, found integer
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= note: expected struct `Box<(dyn Trait + 'static)>`
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found type `{integer}`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | Box::new(42)
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| +++++++++ +
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error: aborting due to 19 previous errors
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Some errors have detailed explanations: E0277, E0308, E0746, E0782.
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For more information about an error, try `rustc --explain E0277`.
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