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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 `i32` because of return type
...
LL | 1u32
| ^^^^ expected `i32`, found `u32`
|
help: change the type of the numeric literal from `u32` to `i32`
|
LL | 1i32
| ~~~
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 `i32` because of return type
...
LL | return 1u32;
| ^^^^ expected `i32`, found `u32`
|
help: change the type of the numeric literal from `u32` to `i32`
|
LL | return 1i32;
| ~~~
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 `i32` because of return type
...
LL | 1u32
| ^^^^ expected `i32`, found `u32`
|
help: you can convert a `u32` to an `i32` and panic if the converted value doesn't fit
|
LL | }.try_into().unwrap()
| ++++++++++++++++++++
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
|
help: you could change the return type to be a boxed trait object
|
LL | fn qux() -> Box<dyn std::fmt::Display> {
| ~~~~~~~ +
help: if you change the return type to expect trait objects, box the returned expressions
|
LL ~ Box::new(0i32)
LL | } else {
LL ~ Box::new(1u32)
|
help: change the type of the numeric literal from `u32` to `i32`
|
LL | 1i32
| ~~~
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 `i32` because of return type
...
LL | _ => 1u32,
| ^^^^ expected `i32`, found `u32`
|
help: you can convert a `u32` to an `i32` and panic if the converted value doesn't fit
|
LL | }.try_into().unwrap()
| ++++++++++++++++++++
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 `i32` because of return type
LL | / match 13 {
LL | | 0 => return 0i32,
LL | | 1 => 1u32,
LL | | _ => 2u32,
LL | | }
| |_____^ expected `i32`, found `u32`
|
help: you can convert a `u32` to an `i32` and panic if the converted value doesn't fit
|
LL | }.try_into().unwrap()
| ++++++++++++++++++++
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 `i32` because of return type
...
LL | 1u32
| ^^^^ expected `i32`, found `u32`
|
help: you can convert a `u32` to an `i32` and panic if the converted value doesn't fit
|
LL | }.try_into().unwrap()
| ++++++++++++++++++++
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
|
help: you could change the return type to be a boxed trait object
|
LL | fn dog() -> Box<dyn std::fmt::Display> {
| ~~~~~~~ +
help: if you change the return type to expect trait objects, box the returned expressions
|
LL ~ 0 => Box::new(0i32),
LL ~ 1 => Box::new(1u32),
|
help: change the type of the numeric literal from `u32` to `i32`
|
LL | 1 => 1i32,
| ~~~
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
|
help: you could change the return type to be a boxed trait object
|
LL | fn apt() -> Box<dyn std::fmt::Display> {
| ~~~~~~~ +
help: if you change the return type to expect trait objects, box the returned expressions
|
LL ~ Box::new(0i32)
LL | } else {
LL ~ Box::new(1u32)
|
help: change the type of the numeric literal from `u32` to `i32`
|
LL | 1i32
| ~~~
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
|
help: return an `impl Trait` instead of a `dyn Trait`, if all returned values are the same type
|
LL | fn hat() -> impl std::fmt::Display {
| ~~~~
help: box the return type, and wrap all of the returned values in `Box::new`
|
LL ~ fn hat() -> Box<dyn std::fmt::Display> {
LL | match 13 {
LL | 0 => {
LL ~ return Box::new(0i32);
LL | }
LL | _ => {
LL ~ Box::new(1u32)
|
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
|
help: return an `impl Trait` instead of a `dyn Trait`, if all returned values are the same type
|
LL | fn pug() -> impl std::fmt::Display {
| ~~~~
help: box the return type, and wrap all of the returned values in `Box::new`
|
LL ~ fn pug() -> Box<dyn std::fmt::Display> {
LL | match 13 {
LL ~ 0 => Box::new(0i32),
LL ~ 1 => Box::new(1u32),
LL ~ _ => Box::new(2u32),
|
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
|
help: return an `impl Trait` instead of a `dyn Trait`, if all returned values are the same type
|
LL | fn man() -> impl std::fmt::Display {
| ~~~~
help: box the return type, and wrap all of the returned values in `Box::new`
|
LL ~ fn man() -> Box<dyn std::fmt::Display> {
LL | if false {
LL ~ Box::new(0i32)
LL | } else {
LL ~ Box::new(1u32)
|
error: aborting due to 12 previous errors
Some errors have detailed explanations: E0308, E0746.
For more information about an error, try `rustc --explain E0308`.
|
