rust/tests/ui/self/elision/ref-struct.stderr

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error: lifetime may not live long enough
--> $DIR/ref-struct.rs:12:9
|
LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 {
| - - let's call the lifetime of this reference `'1`
| |
| let's call the lifetime of this reference `'2`
LL | f
| ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
|
help: consider introducing a named lifetime parameter and update trait if needed
|
Tweak suggested lifetimes to modify return type instead of `&self` receiver Do not suggest constraining the `&self` param, but rather the return type. If that is wrong (because it is not sufficient), a follow up error will tell the user to fix it. This way we lower the chances of *over* constraining, but still get the cake of "correctly" contrained in two steps. This is a correct suggestion: ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:9:9 | LL | fn foo<'a>(&self, x: &i32) -> &i32 { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | x | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a i32) -> &'a i32 { | ++ ++ ``` While this is incomplete because it should suggestino `&'a self` ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-self-is-anon.rs:7:19 | LL | fn foo<'a>(&self, x: &Foo) -> &Foo { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | if true { x } else { self } | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | ++ ++ ``` but the follow up error is ``` error: lifetime may not live long enough --> tests/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.rs:7:30 | 6 | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | -- - let's call the lifetime of this reference `'1` | | | lifetime `'a` defined here 7 | if true { x } else { self } | ^^^^ method was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | 6 | fn foo<'a>(&'a self, x: &'a Foo) -> &'a Foo { | ++ ```
2024-05-07 19:54:16 +00:00
LL | fn ref_Struct<'a>(self: &Struct, f: &'a u32) -> &'a u32 {
| ++++ ++ ++
error: lifetime may not live long enough
--> $DIR/ref-struct.rs:17:9
|
LL | fn box_ref_Struct(self: Box<&Struct>, f: &u32) -> &u32 {
| - - let's call the lifetime of this reference `'1`
| |
| let's call the lifetime of this reference `'2`
LL | f
| ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
|
help: consider introducing a named lifetime parameter and update trait if needed
|
Tweak suggested lifetimes to modify return type instead of `&self` receiver Do not suggest constraining the `&self` param, but rather the return type. If that is wrong (because it is not sufficient), a follow up error will tell the user to fix it. This way we lower the chances of *over* constraining, but still get the cake of "correctly" contrained in two steps. This is a correct suggestion: ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:9:9 | LL | fn foo<'a>(&self, x: &i32) -> &i32 { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | x | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a i32) -> &'a i32 { | ++ ++ ``` While this is incomplete because it should suggestino `&'a self` ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-self-is-anon.rs:7:19 | LL | fn foo<'a>(&self, x: &Foo) -> &Foo { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | if true { x } else { self } | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | ++ ++ ``` but the follow up error is ``` error: lifetime may not live long enough --> tests/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.rs:7:30 | 6 | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | -- - let's call the lifetime of this reference `'1` | | | lifetime `'a` defined here 7 | if true { x } else { self } | ^^^^ method was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | 6 | fn foo<'a>(&'a self, x: &'a Foo) -> &'a Foo { | ++ ```
2024-05-07 19:54:16 +00:00
LL | fn box_ref_Struct<'a>(self: Box<&Struct>, f: &'a u32) -> &'a u32 {
| ++++ ++ ++
error: lifetime may not live long enough
--> $DIR/ref-struct.rs:22:9
|
LL | fn pin_ref_Struct(self: Pin<&Struct>, f: &u32) -> &u32 {
| - - let's call the lifetime of this reference `'1`
| |
| let's call the lifetime of this reference `'2`
LL | f
| ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
|
help: consider introducing a named lifetime parameter and update trait if needed
|
Tweak suggested lifetimes to modify return type instead of `&self` receiver Do not suggest constraining the `&self` param, but rather the return type. If that is wrong (because it is not sufficient), a follow up error will tell the user to fix it. This way we lower the chances of *over* constraining, but still get the cake of "correctly" contrained in two steps. This is a correct suggestion: ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:9:9 | LL | fn foo<'a>(&self, x: &i32) -> &i32 { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | x | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a i32) -> &'a i32 { | ++ ++ ``` While this is incomplete because it should suggestino `&'a self` ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-self-is-anon.rs:7:19 | LL | fn foo<'a>(&self, x: &Foo) -> &Foo { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | if true { x } else { self } | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | ++ ++ ``` but the follow up error is ``` error: lifetime may not live long enough --> tests/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.rs:7:30 | 6 | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | -- - let's call the lifetime of this reference `'1` | | | lifetime `'a` defined here 7 | if true { x } else { self } | ^^^^ method was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | 6 | fn foo<'a>(&'a self, x: &'a Foo) -> &'a Foo { | ++ ```
2024-05-07 19:54:16 +00:00
LL | fn pin_ref_Struct<'a>(self: Pin<&Struct>, f: &'a u32) -> &'a u32 {
| ++++ ++ ++
error: lifetime may not live long enough
--> $DIR/ref-struct.rs:27:9
|
LL | fn box_box_ref_Struct(self: Box<Box<&Struct>>, f: &u32) -> &u32 {
| - - let's call the lifetime of this reference `'1`
| |
| let's call the lifetime of this reference `'2`
LL | f
| ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
|
help: consider introducing a named lifetime parameter and update trait if needed
|
Tweak suggested lifetimes to modify return type instead of `&self` receiver Do not suggest constraining the `&self` param, but rather the return type. If that is wrong (because it is not sufficient), a follow up error will tell the user to fix it. This way we lower the chances of *over* constraining, but still get the cake of "correctly" contrained in two steps. This is a correct suggestion: ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:9:9 | LL | fn foo<'a>(&self, x: &i32) -> &i32 { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | x | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a i32) -> &'a i32 { | ++ ++ ``` While this is incomplete because it should suggestino `&'a self` ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-self-is-anon.rs:7:19 | LL | fn foo<'a>(&self, x: &Foo) -> &Foo { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | if true { x } else { self } | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | ++ ++ ``` but the follow up error is ``` error: lifetime may not live long enough --> tests/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.rs:7:30 | 6 | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | -- - let's call the lifetime of this reference `'1` | | | lifetime `'a` defined here 7 | if true { x } else { self } | ^^^^ method was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | 6 | fn foo<'a>(&'a self, x: &'a Foo) -> &'a Foo { | ++ ```
2024-05-07 19:54:16 +00:00
LL | fn box_box_ref_Struct<'a>(self: Box<Box<&Struct>>, f: &'a u32) -> &'a u32 {
| ++++ ++ ++
error: lifetime may not live long enough
--> $DIR/ref-struct.rs:32:9
|
LL | fn box_pin_Struct(self: Box<Pin<&Struct>>, f: &u32) -> &u32 {
| - - let's call the lifetime of this reference `'1`
| |
| let's call the lifetime of this reference `'2`
LL | f
| ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
|
help: consider introducing a named lifetime parameter and update trait if needed
|
Tweak suggested lifetimes to modify return type instead of `&self` receiver Do not suggest constraining the `&self` param, but rather the return type. If that is wrong (because it is not sufficient), a follow up error will tell the user to fix it. This way we lower the chances of *over* constraining, but still get the cake of "correctly" contrained in two steps. This is a correct suggestion: ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:9:9 | LL | fn foo<'a>(&self, x: &i32) -> &i32 { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | x | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a i32) -> &'a i32 { | ++ ++ ``` While this is incomplete because it should suggestino `&'a self` ``` error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-self-is-anon.rs:7:19 | LL | fn foo<'a>(&self, x: &Foo) -> &Foo { | - - let's call the lifetime of this reference `'1` | | | let's call the lifetime of this reference `'2` LL | if true { x } else { self } | ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | LL | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | ++ ++ ``` but the follow up error is ``` error: lifetime may not live long enough --> tests/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-self-is-anon.rs:7:30 | 6 | fn foo<'a>(&self, x: &'a Foo) -> &'a Foo { | -- - let's call the lifetime of this reference `'1` | | | lifetime `'a` defined here 7 | if true { x } else { self } | ^^^^ method was supposed to return data with lifetime `'a` but it is returning data with lifetime `'1` | help: consider introducing a named lifetime parameter and update trait if needed | 6 | fn foo<'a>(&'a self, x: &'a Foo) -> &'a Foo { | ++ ```
2024-05-07 19:54:16 +00:00
LL | fn box_pin_Struct<'a>(self: Box<Pin<&Struct>>, f: &'a u32) -> &'a u32 {
| ++++ ++ ++
error: aborting due to 5 previous errors