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Further tweak wording of E0759 and introduce E0767

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This commit is contained in:
Esteban Küber
2020-06-29 11:14:42 -07:00
parent 6bac3dbfc2
commit 7bf39fa9d9
43 changed files with 280 additions and 167 deletions
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64
src/test/ui/suggestions/impl-on-dyn-trait-with-implicit-static-bound.stderr
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@@ -1,4 +1,4 @@
error[E0759]: cannot infer an appropriate lifetime
error[E0759]: `val` has lifetime `'a` but it needs to satisfy a `'static` lifetime requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:20:13
|
LL | fn use_it<'a>(val: &'a dyn ObjectTrait) -> impl OtherTrait<'a> + 'a {
@@ -6,78 +6,102 @@ LL | fn use_it<'a>(val: &'a dyn ObjectTrait) -> impl OtherTrait<'a> + 'a {
LL | val.use_self()
| ^^^^^^^^ ...is captured and required to live as long as `'static` here
|
note: when using method `use_self` of trait `foo::MyTrait` on `foo::ObjectTrait`, an implicit `'static` requirement is introduced
note: `foo::ObjectTrait`'s `impl` of `foo::MyTrait` has an implicit `'static` requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:14:26
|
LL | impl MyTrait for dyn ObjectTrait {
| ^^^^^^^^^^^ this trait object has an implicit `'static` lifetime requirement
| ^^^^^^^^^^^ this has an implicit `'static` lifetime requirement
LL | fn use_self(&self) -> &() { panic!() }
| -------- the `'static` requirement is introduced when calling this method
| -------- `'static` requirement is introduced when calling this method
help: consider relaxing the implicit `'static` requirement
|
LL | impl MyTrait for dyn ObjectTrait + '_ {
| ^^^^
error[E0759]: cannot infer an appropriate lifetime
error[E0767]: `val` has lifetime `'a` but calling `use_self` introduces an implicit `'static` lifetime requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:69:13
|
LL | fn use_it<'a>(val: &'a dyn ObjectTrait) -> impl OtherTrait<'a> + 'a {
| ------------------- this data with lifetime `'a`...
LL | val.use_self()
| ^^^^^^^^ ...is captured and required to live as long as `'static` here
| ^^^^^^^^ ...is captured and required to live as long as `'static` here because of an implicit lifetime bound on the inherent `impl`
|
note: when using method `use_self` on `bat::ObjectTrait`, an implicit `'static` requirement is introduced
note: `bat::ObjectTrait`'s inherent `impl` has a `'static` requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:64:14
|
LL | impl dyn ObjectTrait {
| ^^^^^^^^^^^ this trait object has an implicit `'static` lifetime requirement
| ^^^^^^^^^^^ this has an implicit `'static` lifetime requirement
LL | fn use_self(&self) -> &() { panic!() }
| -------- the `'static` requirement is introduced when calling this method
| -------- `'static` requirement is introduced when calling this method
help: consider relaxing the implicit `'static` requirement
|
LL | impl dyn ObjectTrait + '_ {
| ^^^^
error[E0759]: cannot infer an appropriate lifetime
error[E0759]: `val` has lifetime `'a` but it needs to satisfy a `'static` lifetime requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:89:13
|
LL | fn use_it<'a>(val: &'a dyn ObjectTrait) -> impl OtherTrait<'a> {
| ------------------- this data with lifetime `'a`...
LL | val.use_self()
| ^^^^^^^^ ...is captured and required to live as long as `'static` here
|
note: `ban::ObjectTrait`'s `impl` of `ban::MyTrait` has an implicit `'static` requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:83:26
|
LL | impl MyTrait for dyn ObjectTrait {
| ^^^^^^^^^^^ this has an implicit `'static` lifetime requirement
LL | fn use_self(&self) -> &() { panic!() }
| -------- `'static` requirement is introduced when calling this method
help: consider relaxing the implicit `'static` requirement
|
LL | impl MyTrait for dyn ObjectTrait + '_ {
| ^^^^
help: to declare that the `impl Trait` captures data from argument `val`, you can add an explicit `'a` lifetime bound
|
LL | fn use_it<'a>(val: &'a dyn ObjectTrait) -> impl OtherTrait<'a> + 'a {
| ^^^^
error[E0767]: `val` has lifetime `'a` but calling `use_self` introduces an implicit `'static` lifetime requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:37:13
|
LL | fn use_it<'a>(val: &'a dyn ObjectTrait) -> &'a () {
| ------------------- this data with lifetime `'a`...
LL | val.use_self()
| ^^^^^^^^ ...is captured and required to live as long as `'static` here
| ^^^^^^^^ ...is captured and required to live as long as `'static` here because of an implicit lifetime on the `impl` of `bar::MyTrait`
|
note: when using method `use_self` of trait `bar::MyTrait` on `bar::ObjectTrait`, an implicit `'static` requirement is introduced
note: `bar::ObjectTrait`'s `impl` of `bar::MyTrait` has an implicit `'static` requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:31:26
|
LL | impl MyTrait for dyn ObjectTrait {
| ^^^^^^^^^^^ this trait object has an implicit `'static` lifetime requirement
| ^^^^^^^^^^^ this has an implicit `'static` lifetime requirement
LL | fn use_self(&self) -> &() { panic!() }
| -------- the `'static` requirement is introduced when calling this method
| -------- `'static` requirement is introduced when calling this method
help: consider relaxing the implicit `'static` requirement
|
LL | impl MyTrait for dyn ObjectTrait + '_ {
| ^^^^
error[E0759]: cannot infer an appropriate lifetime
error[E0767]: `val` has lifetime `'a` but calling `use_self` introduces an implicit `'static` lifetime requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:54:13
|
LL | fn use_it<'a>(val: &'a Box<dyn ObjectTrait + 'a>) -> &'a () {
| ----------------------------- this data with lifetime `'a`...
LL | val.use_self()
| ^^^^^^^^ ...is captured and required to live as long as `'static` here
| ^^^^^^^^ ...is captured and required to live as long as `'static` here because of an implicit lifetime on the `impl` of `baz::MyTrait`
|
note: when using method `use_self` of trait `baz::MyTrait` on `baz::ObjectTrait`, an implicit `'static` requirement is introduced
note: `baz::ObjectTrait`'s `impl` of `baz::MyTrait` has an implicit `'static` requirement
--> $DIR/impl-on-dyn-trait-with-implicit-static-bound.rs:48:30
|
LL | impl MyTrait for Box<dyn ObjectTrait> {
| ^^^^^^^^^^^ this trait object has an implicit `'static` lifetime requirement
| ^^^^^^^^^^^ this has an implicit `'static` lifetime requirement
LL | fn use_self(&self) -> &() { panic!() }
| -------- the `'static` requirement is introduced when calling this method
| -------- `'static` requirement is introduced when calling this method
help: consider relaxing the implicit `'static` requirement
|
LL | impl MyTrait for Box<dyn ObjectTrait + '_> {
| ^^^^
error: aborting due to 4 previous errors
error: aborting due to 5 previous errors
For more information about this error, try `rustc --explain E0759`.