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|
error[E0308]: mismatched types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:5:5
|
LL | fn foo() -> impl std::fmt::Display {
| ---------------------- expected `_` because of return type
...
LL | 1u32
| ^^^^ expected `i32`, found `u32`
error[E0308]: mismatched types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:12:16
|
LL | fn bar() -> impl std::fmt::Display {
| ---------------------- expected `_` because of return type
...
LL | return 1u32;
| ^^^^ expected `i32`, found `u32`
error[E0308]: mismatched types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:20:9
|
LL | fn baz() -> impl std::fmt::Display {
| ---------------------- expected `_` because of return type
...
LL | 1u32
| ^^^^ expected `i32`, found `u32`
error[E0308]: `if` and `else` have incompatible types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:28:9
|
LL | / if false {
LL | | 0i32
| | ---- expected because of this
LL | | } else {
LL | | 1u32
| | ^^^^ expected `i32`, found `u32`
LL | | }
| |_____- `if` and `else` have incompatible types
error[E0308]: mismatched types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:35:14
|
LL | fn bat() -> impl std::fmt::Display {
| ---------------------- expected `_` because of return type
...
LL | _ => 1u32,
| ^^^^ expected `i32`, found `u32`
error[E0308]: mismatched types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:40:5
|
LL | fn can() -> impl std::fmt::Display {
| ---------------------- expected `_` because of return type
LL | / match 13 {
LL | | 0 => return 0i32,
LL | | 1 => 1u32,
LL | | _ => 2u32,
LL | | }
| |_____^ expected `i32`, found `u32`
error[E0308]: mismatched types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:53:13
|
LL | fn cat() -> impl std::fmt::Display {
| ---------------------- expected `_` because of return type
...
LL | 1u32
| ^^^^ expected `i32`, found `u32`
error[E0308]: `match` arms have incompatible types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:61:14
|
LL | / match 13 {
LL | | 0 => 0i32,
| | ---- this is found to be of type `i32`
LL | | 1 => 1u32,
| | ^^^^ expected `i32`, found `u32`
LL | | _ => 2u32,
LL | | }
| |_____- `match` arms have incompatible types
error[E0308]: `if` and `else` have incompatible types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:97:9
|
LL | / if let Some(42) = Some(42) {
LL | | 0i32
| | ---- expected because of this
LL | | } else {
LL | | 1u32
| | ^^^^ expected `i32`, found `u32`
LL | | }
| |_____- `if` and `else` have incompatible types
error[E0746]: return type cannot have an unboxed trait object
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:66:13
|
LL | fn hat() -> dyn std::fmt::Display {
| ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= note: for information on trait objects, see <https://doc.rust-lang.org/book/ch17-02-trait-objects.html#using-trait-objects-that-allow-for-values-of-different-types>
= note: if all the returned values were of the same type you could use `impl std::fmt::Display` as the return type
= note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
= note: you can create a new `enum` with a variant for each returned type
help: return a boxed trait object instead
|
LL | fn hat() -> Box<dyn std::fmt::Display> {
| ++++ +
help: ... and box this value
|
LL | return Box::new(0i32);
| +++++++++ +
help: ... and box this value
|
LL | Box::new(1u32)
| +++++++++ +
error[E0308]: `match` arms have incompatible types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:80:14
|
LL | / match 13 {
LL | | 0 => 0i32,
| | ---- this is found to be of type `i32`
LL | | 1 => 1u32,
| | ^^^^ expected `i32`, found `u32`
LL | | _ => 2u32,
LL | | }
| |_____- `match` arms have incompatible types
error[E0746]: return type cannot have an unboxed trait object
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:77:13
|
LL | fn pug() -> dyn std::fmt::Display {
| ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= note: for information on trait objects, see <https://doc.rust-lang.org/book/ch17-02-trait-objects.html#using-trait-objects-that-allow-for-values-of-different-types>
= note: if all the returned values were of the same type you could use `impl std::fmt::Display` as the return type
= note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
= note: you can create a new `enum` with a variant for each returned type
help: return a boxed trait object instead
|
LL | fn pug() -> Box<dyn std::fmt::Display> {
| ++++ +
help: ... and box this value
|
LL | 0 => Box::new(0i32),
| +++++++++ +
help: ... and box this value
|
LL | 1 => Box::new(1u32),
| +++++++++ +
help: ... and box this value
|
LL | _ => Box::new(2u32),
| +++++++++ +
error[E0308]: `if` and `else` have incompatible types
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:89:9
|
LL | / if false {
LL | | 0i32
| | ---- expected because of this
LL | | } else {
LL | | 1u32
| | ^^^^ expected `i32`, found `u32`
LL | | }
| |_____- `if` and `else` have incompatible types
error[E0746]: return type cannot have an unboxed trait object
--> $DIR/point-to-type-err-cause-on-impl-trait-return.rs:85:13
|
LL | fn man() -> dyn std::fmt::Display {
| ^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= note: for information on trait objects, see <https://doc.rust-lang.org/book/ch17-02-trait-objects.html#using-trait-objects-that-allow-for-values-of-different-types>
= note: if all the returned values were of the same type you could use `impl std::fmt::Display` as the return type
= note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
= note: you can create a new `enum` with a variant for each returned type
help: return a boxed trait object instead
|
LL | fn man() -> Box<dyn std::fmt::Display> {
| ++++ +
help: ... and box this value
|
LL | Box::new(0i32)
| +++++++++ +
help: ... and box this value
|
LL | Box::new(1u32)
| +++++++++ +
error: aborting due to 14 previous errors
Some errors have detailed explanations: E0308, E0746.
For more information about an error, try `rustc --explain E0308`.
|
