nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-11-22 14:55:26 +00:00
Code Issues Packages Projects Releases Wiki Activity

Rollup merge of #112614 - lukas-code:apit-unsized-suggestion, r=compiler-errors

Browse Source 
tweak suggestion for argument-position `impl ?Sized`

fixes this invalid suggestion:
```text
help: consider removing the `?Sized` bound to make the type parameter `Sized`
  |
1 - fn foo(_: impl ?Sized) {}
1 + fn foo(_: impl ) {}
  |
```
This commit is contained in:
Guillaume Gomez 2023-06-15 22:04:56 +02:00 committed by GitHub
commit af955a647e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
26 changed files with 141 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
compiler/rustc_middle/src/ty/diagnostics.rs
View File

@ -14,8 +14,8 @@ use rustc_errors::{Applicability, Diagnostic, DiagnosticArgValue, IntoDiagnostic
use rustc_hir as hir;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::DefId;
use rustc_hir::WherePredicate;
use rustc_span::Span;
use rustc_hir::{PredicateOrigin, WherePredicate};
use rustc_span::{BytePos, Span};
use rustc_type_ir::sty::TyKind::*;
impl<'tcx> IntoDiagnosticArg for Ty<'tcx> {
@ -156,10 +156,11 @@ enum SuggestChangingConstraintsMessage<'a> {
RestrictBoundFurther,
RestrictType { ty: &'a str },
RestrictTypeFurther { ty: &'a str },
RemovingQSized,
RemoveMaybeUnsized,
ReplaceMaybeUnsizedWithSized,
}
fn suggest_removing_unsized_bound(
fn suggest_changing_unsized_bound(
generics: &hir::Generics<'_>,
suggestions: &mut Vec<(Span, String, SuggestChangingConstraintsMessage<'_>)>,
param: &hir::GenericParam<'_>,
@ -183,12 +184,25 @@ fn suggest_removing_unsized_bound(
if poly.trait_ref.trait_def_id() != def_id {
continue;
}
let sp = generics.span_for_bound_removal(where_pos, pos);
suggestions.push((
sp,
String::new(),
SuggestChangingConstraintsMessage::RemovingQSized,
));
if predicate.origin == PredicateOrigin::ImplTrait && predicate.bounds.len() == 1 {
// For `impl ?Sized` with no other bounds, suggest `impl Sized` instead.
let bound_span = bound.span();
if bound_span.can_be_used_for_suggestions() {
let question_span = bound_span.with_hi(bound_span.lo() + BytePos(1));
suggestions.push((
question_span,
String::new(),
SuggestChangingConstraintsMessage::ReplaceMaybeUnsizedWithSized,
));
}
} else {
let sp = generics.span_for_bound_removal(where_pos, pos);
suggestions.push((
sp,
String::new(),
SuggestChangingConstraintsMessage::RemoveMaybeUnsized,
));
}
}
}
}
@ -238,14 +252,11 @@ pub fn suggest_constraining_type_params<'a>(
{
let mut sized_constraints =
constraints.extract_if(|(_, def_id)| *def_id == tcx.lang_items().sized_trait());
if let Some((constraint, def_id)) = sized_constraints.next() {
if let Some((_, def_id)) = sized_constraints.next() {
applicability = Applicability::MaybeIncorrect;
err.span_label(
param.span,
format!("this type parameter needs to be `{}`", constraint),
);
suggest_removing_unsized_bound(generics, &mut suggestions, param, def_id);
err.span_label(param.span, "this type parameter needs to be `Sized`");
suggest_changing_unsized_bound(generics, &mut suggestions, param, def_id);
}
}
@ -395,9 +406,12 @@ pub fn suggest_constraining_type_params<'a>(
SuggestChangingConstraintsMessage::RestrictTypeFurther { ty } => {
Cow::from(format!("consider further restricting type parameter `{}`", ty))
}
SuggestChangingConstraintsMessage::RemovingQSized => {
SuggestChangingConstraintsMessage::RemoveMaybeUnsized => {
Cow::from("consider removing the `?Sized` bound to make the type parameter `Sized`")
}
SuggestChangingConstraintsMessage::ReplaceMaybeUnsizedWithSized => {
Cow::from("consider replacing `?Sized` with `Sized`")
}
};
err.span_suggestion_verbose(span, msg, suggestion, applicability);

2
tests/ui/const-generics/const-argument-if-length.full.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/const-argument-if-length.rs:15:12
|
LL | pub struct AtLeastByte<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: T,
| ^ doesn't have a size known at compile-time
|

2
tests/ui/const-generics/const-argument-if-length.min.stderr
View File

@ -11,7 +11,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/const-argument-if-length.rs:15:12
|
LL | pub struct AtLeastByte<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: T,
| ^ doesn't have a size known at compile-time
|

4
tests/ui/dst/dst-object-from-unsized-type.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/dst-object-from-unsized-type.rs:8:23
|
LL | fn test1<T: ?Sized + Foo>(t: &T) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let u: &dyn Foo = t;
| ^ doesn't have a size known at compile-time
|
@ -17,7 +17,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/dst-object-from-unsized-type.rs:13:23
|
LL | fn test2<T: ?Sized + Foo>(t: &T) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let v: &dyn Foo = t as &dyn Foo;
| ^ doesn't have a size known at compile-time
|

2
tests/ui/generic-associated-types/issue-88287.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
--> $DIR/issue-88287.rs:34:9
|
LL | type SearchFutureTy<'f, A, B: 'f>
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | async move { todo!() }
| ^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time

2
tests/ui/offset-of/offset-of-dst-field.stderr
View File

@ -70,7 +70,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/offset-of-dst-field.rs:50:5
|
LL | fn generic_with_maybe_sized<T: ?Sized>() -> usize {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | offset_of!(Delta<T>, z)
| ^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|

2
tests/ui/packed/issue-27060-2.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/issue-27060-2.rs:3:11
|
LL | pub struct Bad<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | data: T,
| ^ doesn't have a size known at compile-time
|

2
tests/ui/suggestions/adt-param-with-implicit-sized-bound.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/adt-param-with-implicit-sized-bound.rs:25:9
|
LL | struct Struct5<T: ?Sized>{
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | _t: X<T>,
| ^^^^ doesn't have a size known at compile-time
|

6
tests/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo<T>(foo: Wrapper<T>)
| - ^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Wrapper`
--> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
@ -33,7 +33,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn bar<T>(foo: Wrapper<T>)
| - ^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Wrapper`
--> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
@ -58,7 +58,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn qux<T>(foo: Wrapper<T>)
| - ^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Wrapper`
--> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16

4
tests/ui/trait-bounds/apit-unsized.rs Normal file
View File

@ -0,0 +1,4 @@
fn foo(_: impl Iterator<Item = i32> + ?Sized) {} //~ ERROR [E0277]
fn bar(_: impl ?Sized) {} //~ ERROR [E0277]
fn main() {}

41
tests/ui/trait-bounds/apit-unsized.stderr Normal file
View File

@ -0,0 +1,41 @@
error[E0277]: the size for values of type `impl Iterator<Item = i32> + ?Sized` cannot be known at compilation time
--> $DIR/apit-unsized.rs:1:8
|
LL | fn foo(_: impl Iterator<Item = i32> + ?Sized) {}
| ^ ---------------------------------- this type parameter needs to be `Sized`
| |
| doesn't have a size known at compile-time
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`
|
LL - fn foo(_: impl Iterator<Item = i32> + ?Sized) {}
LL + fn foo(_: impl Iterator<Item = i32>) {}
|
help: function arguments must have a statically known size, borrowed types always have a known size
|
LL | fn foo(_: &impl Iterator<Item = i32> + ?Sized) {}
| +
error[E0277]: the size for values of type `impl ?Sized` cannot be known at compilation time
--> $DIR/apit-unsized.rs:2:8
|
LL | fn bar(_: impl ?Sized) {}
| ^ ----------- this type parameter needs to be `Sized`
| |
| doesn't have a size known at compile-time
|
= help: unsized fn params are gated as an unstable feature
help: consider replacing `?Sized` with `Sized`
|
LL - fn bar(_: impl ?Sized) {}
LL + fn bar(_: impl Sized) {}
|
help: function arguments must have a statically known size, borrowed types always have a known size
|
LL | fn bar(_: &impl ?Sized) {}
| +
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.

30
tests/ui/trait-bounds/unsized-bound.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `B` cannot be known at compilation tim
LL | impl<A, B> Trait<(A, B)> for (A, B) where A: ?Sized, B: ?Sized, {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: required because it appears within the type `(A, B)`
note: required by a bound in `Trait`
@ -28,7 +28,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A, B> Trait<(A, B)> for (A, B) where A: ?Sized, B: ?Sized, {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -43,7 +43,7 @@ error[E0277]: the size for values of type `C` cannot be known at compilation tim
LL | impl<A, B: ?Sized, C: ?Sized> Trait<(A, B, C)> for (A, B, C) where A: ?Sized, {}
| - ^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: required because it appears within the type `(A, B, C)`
note: required by a bound in `Trait`
@ -65,9 +65,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
--> $DIR/unsized-bound.rs:5:52
|
LL | impl<A, B: ?Sized, C: ?Sized> Trait<(A, B, C)> for (A, B, C) where A: ?Sized, {}
| - ^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized` ^^^^^^^^^ doesn't have a size known at compile-time
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -80,9 +78,7 @@ error[E0277]: the size for values of type `B` cannot be known at compilation tim
--> $DIR/unsized-bound.rs:5:52
|
LL | impl<A, B: ?Sized, C: ?Sized> Trait<(A, B, C)> for (A, B, C) where A: ?Sized, {}
| - ^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized` ^^^^^^^^^ doesn't have a size known at compile-time
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -97,7 +93,7 @@ error[E0277]: the size for values of type `B` cannot be known at compilation tim
LL | impl<A: ?Sized, B: ?Sized> Trait2<(A, B)> for (A, B) {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: required because it appears within the type `(A, B)`
note: required by a bound in `Trait2`
@ -121,7 +117,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A: ?Sized, B: ?Sized> Trait2<(A, B)> for (A, B) {}
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= note: only the last element of a tuple may have a dynamically sized type
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -136,7 +132,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A> Trait3<A> for A where A: ?Sized {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait3`
--> $DIR/unsized-bound.rs:13:14
@ -159,7 +155,7 @@ error[E0277]: the size for values of type `A` cannot be known at compilation tim
LL | impl<A: ?Sized> Trait4<A> for A {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait4`
--> $DIR/unsized-bound.rs:16:14
@ -182,7 +178,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X, Y> Trait5<X, Y> for X where X: ?Sized {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait5`
--> $DIR/unsized-bound.rs:19:14
@ -205,7 +201,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized, Y> Trait6<X, Y> for X {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait6`
--> $DIR/unsized-bound.rs:22:14
@ -228,7 +224,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
LL | impl<X, Y> Trait7<X, Y> for X where Y: ?Sized {}
| - ^^^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait7`
--> $DIR/unsized-bound.rs:25:17
@ -251,7 +247,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
LL | impl<X, Y: ?Sized> Trait8<X, Y> for X {}
| - ^^^^^^^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Trait8`
--> $DIR/unsized-bound.rs:28:17

4
tests/ui/traits/suggest-where-clause.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `U` cannot be known at compilation tim
--> $DIR/suggest-where-clause.rs:7:20
|
LL | fn check<T: Iterator, U: ?Sized>() {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | // suggest a where-clause, if needed
LL | mem::size_of::<U>();
| ^ doesn't have a size known at compile-time
@ -19,7 +19,7 @@ error[E0277]: the size for values of type `U` cannot be known at compilation tim
--> $DIR/suggest-where-clause.rs:10:20
|
LL | fn check<T: Iterator, U: ?Sized>() {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | mem::size_of::<Misc<U>>();
| ^^^^^^^ doesn't have a size known at compile-time

6
tests/ui/union/union-sized-field.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/union-sized-field.rs:4:12
|
LL | union Foo<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: ManuallyDrop<T>,
| ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
@ -28,7 +28,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/union-sized-field.rs:9:12
|
LL | struct Foo2<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | value: ManuallyDrop<T>,
| ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
@ -54,7 +54,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
--> $DIR/union-sized-field.rs:15:11
|
LL | enum Foo3<T: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | Value(ManuallyDrop<T>),
| ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|

2
tests/ui/unsized/unsized-bare-typaram.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo<T: ?Sized>() { bar::<T>() }
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `bar`
--> $DIR/unsized-bare-typaram.rs:1:8

2
tests/ui/unsized/unsized-enum.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Foo`
--> $DIR/unsized-enum.rs:4:10

8
tests/ui/unsized/unsized-enum2.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `W` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:23:8
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | // parameter
LL | VA(W),
| ^ doesn't have a size known at compile-time
@ -27,7 +27,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:25:11
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | VB{x: X},
| ^ doesn't have a size known at compile-time
@ -52,7 +52,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:27:15
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | VC(isize, Y),
| ^ doesn't have a size known at compile-time
@ -77,7 +77,7 @@ error[E0277]: the size for values of type `Z` cannot be known at compilation tim
--> $DIR/unsized-enum2.rs:29:21
|
LL | enum E<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | VD{u: isize, x: Z},
| ^ doesn't have a size known at compile-time

2
tests/ui/unsized/unsized-fn-arg.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn f<T: ?Sized>(t: T) {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`

2
tests/ui/unsized/unsized-inherent-impl-self-type.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized> S5<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `S5`
--> $DIR/unsized-inherent-impl-self-type.rs:5:11

4
tests/ui/unsized/unsized-struct.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `Foo`
--> $DIR/unsized-struct.rs:4:12
@ -30,7 +30,7 @@ error[E0277]: the size for values of type `T` cannot be known at compilation tim
LL | fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
| - ^^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required because it appears within the type `Bar<T>`
--> $DIR/unsized-struct.rs:11:8

2
tests/ui/unsized/unsized-trait-impl-self-type.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized> T3<X> for S5<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `S5`
--> $DIR/unsized-trait-impl-self-type.rs:8:11

2
tests/ui/unsized/unsized-trait-impl-trait-arg.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized> T2<X> for S4<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `T2`
--> $DIR/unsized-trait-impl-trait-arg.rs:4:10

12
tests/ui/unsized/unsized3.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:7:13
|
LL | fn f1<X: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f2::<X>(x);
| ------- ^ doesn't have a size known at compile-time
| |
@ -27,7 +27,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:18:13
|
LL | fn f3<X: ?Sized + T>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f4::<X>(x);
| ------- ^ doesn't have a size known at compile-time
| |
@ -52,7 +52,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:33:8
|
LL | fn f8<X: ?Sized>(x1: &S<X>, x2: &S<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(x1);
| -- ^^ doesn't have a size known at compile-time
| |
@ -82,7 +82,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:40:5
|
LL | fn f9<X: ?Sized>(x1: Box<S<X>>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(&(*x1, 34));
| ^^ doesn't have a size known at compile-time
|
@ -102,7 +102,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:45:9
|
LL | fn f10<X: ?Sized>(x1: Box<S<X>>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(&(32, *x1));
| ^^^^^^^^^ doesn't have a size known at compile-time
|
@ -123,7 +123,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized3.rs:45:8
|
LL | fn f10<X: ?Sized>(x1: Box<S<X>>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f5(&(32, *x1));
| -- ^^^^^^^^^^ doesn't have a size known at compile-time
| |

8
tests/ui/unsized/unsized5.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:4:9
|
LL | struct S1<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f1: X,
| ^ doesn't have a size known at compile-time
|
@ -26,7 +26,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:10:8
|
LL | struct S2<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | f: isize,
LL | g: X,
| ^ doesn't have a size known at compile-time
@ -87,7 +87,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:25:8
|
LL | enum E<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | V1(X, isize),
| ^ doesn't have a size known at compile-time
|
@ -111,7 +111,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized5.rs:29:12
|
LL | enum F<X: ?Sized> {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | V2{f1: X, f: isize},
| ^ doesn't have a size known at compile-time
|

26
tests/ui/unsized/unsized6.stderr
View File

@ -2,7 +2,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
--> $DIR/unsized6.rs:9:9
|
LL | fn f1<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y: Y;
| ^ doesn't have a size known at compile-time
@ -23,7 +23,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:7:12
|
LL | fn f1<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let _: W; // <-- this is OK, no bindings created, no initializer.
LL | let _: (isize, (X, isize));
| ^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
@ -39,7 +39,7 @@ error[E0277]: the size for values of type `Z` cannot be known at compilation tim
--> $DIR/unsized6.rs:11:12
|
LL | fn f1<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y: (isize, (Z, usize));
| ^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
@ -55,7 +55,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:15:9
|
LL | fn f2<X: ?Sized, Y: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let y: X;
| ^ doesn't have a size known at compile-time
|
@ -75,7 +75,7 @@ error[E0277]: the size for values of type `Y` cannot be known at compilation tim
--> $DIR/unsized6.rs:17:12
|
LL | fn f2<X: ?Sized, Y: ?Sized>(x: &X) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y: (isize, (Y, isize));
| ^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
@ -91,7 +91,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:22:9
|
LL | fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let y: X = *x1;
| ^ doesn't have a size known at compile-time
|
@ -111,7 +111,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:24:9
|
LL | fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y = *x2;
| ^ doesn't have a size known at compile-time
@ -128,7 +128,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:26:10
|
LL | fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let (y, z) = (*x3, 4);
| ^ doesn't have a size known at compile-time
@ -145,7 +145,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:30:9
|
LL | fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
LL | let y: X = *x1;
| ^ doesn't have a size known at compile-time
|
@ -165,7 +165,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:32:9
|
LL | fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let y = *x2;
| ^ doesn't have a size known at compile-time
@ -182,7 +182,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
--> $DIR/unsized6.rs:34:10
|
LL | fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
| - this type parameter needs to be `std::marker::Sized`
| - this type parameter needs to be `Sized`
...
LL | let (y, z) = (*x3, 4);
| ^ doesn't have a size known at compile-time
@ -201,7 +201,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | fn g1<X: ?Sized>(x: X) {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`
@ -220,7 +220,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | fn g2<X: ?Sized + T>(x: X) {}
| - ^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
= help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`

2
tests/ui/unsized/unsized7.stderr
View File

@ -4,7 +4,7 @@ error[E0277]: the size for values of type `X` cannot be known at compilation tim
LL | impl<X: ?Sized + T> T1<X> for S3<X> {
| - ^^^^^ doesn't have a size known at compile-time
| |
| this type parameter needs to be `std::marker::Sized`
| this type parameter needs to be `Sized`
|
note: required by a bound in `T1`
--> $DIR/unsized7.rs:7:10