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Auto merge of #121500 - oli-obk:track_errors12, r=petrochenkov

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Merge `collect_mod_item_types` query into `check_well_formed`

follow-up to https://github.com/rust-lang/rust/pull/121154

this removes more potential parallel-compiler bottlenecks and moves diagnostics for the same items next to each other, instead of grouping diagnostics by analysis kind
This commit is contained in:
bors 2024-03-08 15:06:36 +00:00
commit 74acabe9b0
67 changed files with 1102 additions and 1113 deletions
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25
compiler/rustc_hir_analysis/src/check/wfcheck.rs
View File

@ -1,7 +1,9 @@
use crate::autoderef::Autoderef;
use crate::collect::CollectItemTypesVisitor;
use crate::constrained_generic_params::{identify_constrained_generic_params, Parameter};
use crate::errors;
use hir::intravisit::Visitor;
use rustc_ast as ast;
use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexSet};
use rustc_errors::{codes::*, pluralize, struct_span_code_err, Applicability, ErrorGuaranteed};
@ -225,6 +227,7 @@ fn check_item<'tcx>(tcx: TyCtxt<'tcx>, item: &'tcx hir::Item<'tcx>) -> Result<()
?item.owner_id,
item.name = ? tcx.def_path_str(def_id)
);
CollectItemTypesVisitor { tcx }.visit_item(item);
let res = match item.kind {
// Right now we check that every default trait implementation
@ -336,9 +339,14 @@ fn check_item<'tcx>(tcx: TyCtxt<'tcx>, item: &'tcx hir::Item<'tcx>) -> Result<()
res
}
fn check_foreign_item(tcx: TyCtxt<'_>, item: &hir::ForeignItem<'_>) -> Result<(), ErrorGuaranteed> {
fn check_foreign_item<'tcx>(
tcx: TyCtxt<'tcx>,
item: &'tcx hir::ForeignItem<'tcx>,
) -> Result<(), ErrorGuaranteed> {
let def_id = item.owner_id.def_id;
CollectItemTypesVisitor { tcx }.visit_foreign_item(item);
debug!(
?item.owner_id,
item.name = ? tcx.def_path_str(def_id)
@ -355,12 +363,14 @@ fn check_foreign_item(tcx: TyCtxt<'_>, item: &hir::ForeignItem<'_>) -> Result<()
}
}
fn check_trait_item(
tcx: TyCtxt<'_>,
trait_item: &hir::TraitItem<'_>,
fn check_trait_item<'tcx>(
tcx: TyCtxt<'tcx>,
trait_item: &'tcx hir::TraitItem<'tcx>,
) -> Result<(), ErrorGuaranteed> {
let def_id = trait_item.owner_id.def_id;
CollectItemTypesVisitor { tcx }.visit_trait_item(trait_item);
let (method_sig, span) = match trait_item.kind {
hir::TraitItemKind::Fn(ref sig, _) => (Some(sig), trait_item.span),
hir::TraitItemKind::Type(_bounds, Some(ty)) => (None, ty.span),
@ -895,7 +905,12 @@ fn check_object_unsafe_self_trait_by_name(tcx: TyCtxt<'_>, item: &hir::TraitItem
}
}
fn check_impl_item(tcx: TyCtxt<'_>, impl_item: &hir::ImplItem<'_>) -> Result<(), ErrorGuaranteed> {
fn check_impl_item<'tcx>(
tcx: TyCtxt<'tcx>,
impl_item: &'tcx hir::ImplItem<'tcx>,
) -> Result<(), ErrorGuaranteed> {
CollectItemTypesVisitor { tcx }.visit_impl_item(impl_item);
let (method_sig, span) = match impl_item.kind {
hir::ImplItemKind::Fn(ref sig, _) => (Some(sig), impl_item.span),
// Constrain binding and overflow error spans to `<Ty>` in `type foo = <Ty>`.

12
compiler/rustc_hir_analysis/src/collect.rs
View File

@ -20,7 +20,7 @@ use rustc_data_structures::unord::UnordMap;
use rustc_errors::{Applicability, Diag, ErrorGuaranteed, StashKey};
use rustc_hir as hir;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::{DefId, LocalDefId, LocalModDefId};
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_hir::intravisit::{self, Visitor};
use rustc_hir::{GenericParamKind, Node};
use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
@ -52,11 +52,6 @@ mod resolve_bound_vars;
mod type_of;
///////////////////////////////////////////////////////////////////////////
// Main entry point
fn collect_mod_item_types(tcx: TyCtxt<'_>, module_def_id: LocalModDefId) {
tcx.hir().visit_item_likes_in_module(module_def_id, &mut CollectItemTypesVisitor { tcx });
}
pub fn provide(providers: &mut Providers) {
resolve_bound_vars::provide(providers);
@ -82,7 +77,6 @@ pub fn provide(providers: &mut Providers) {
impl_trait_header,
coroutine_kind,
coroutine_for_closure,
collect_mod_item_types,
is_type_alias_impl_trait,
find_field,
..*providers
@ -155,8 +149,8 @@ impl<'v> Visitor<'v> for HirPlaceholderCollector {
}
}
struct CollectItemTypesVisitor<'tcx> {
tcx: TyCtxt<'tcx>,
pub struct CollectItemTypesVisitor<'tcx> {
pub tcx: TyCtxt<'tcx>,
}
/// If there are any placeholder types (`_`), emit an error explaining that this is not allowed

6
compiler/rustc_hir_analysis/src/lib.rs
View File

@ -159,12 +159,6 @@ pub fn provide(providers: &mut Providers) {
pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
let _prof_timer = tcx.sess.timer("type_check_crate");
// this ensures that later parts of type checking can assume that items
// have valid types and not error
tcx.sess.time("type_collecting", || {
tcx.hir().for_each_module(|module| tcx.ensure().collect_mod_item_types(module))
});
if tcx.features().rustc_attrs {
tcx.sess.time("outlives_testing", || outlives::test::test_inferred_outlives(tcx))?;
}

5
compiler/rustc_middle/src/query/mod.rs
View File

@ -762,6 +762,7 @@ rustc_queries! {
desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
cache_on_disk_if { def_id.is_local() }
separate_provide_extern
cycle_delay_bug
}
/// Maps from thee `DefId` of a type to its (inferred) outlives.
@ -959,10 +960,6 @@ rustc_queries! {
ensure_forwards_result_if_red
}
query collect_mod_item_types(key: LocalModDefId) {
desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
}
/// Caches `CoerceUnsized` kinds for impls on custom types.
query coerce_unsized_info(key: DefId) -> Result<ty::adjustment::CoerceUnsizedInfo, ErrorGuaranteed> {
desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }

21
compiler/rustc_middle/src/values.rs
View File

@ -131,6 +131,27 @@ impl<'tcx> Value<TyCtxt<'tcx>> for ty::EarlyBinder<ty::Binder<'_, ty::FnSig<'_>>
}
}
impl<'tcx> Value<TyCtxt<'tcx>> for &[ty::Variance] {
fn from_cycle_error(
tcx: TyCtxt<'tcx>,
cycle_error: &CycleError,
_guar: ErrorGuaranteed,
) -> Self {
if let Some(frame) = cycle_error.cycle.get(0)
&& frame.query.dep_kind == dep_kinds::variances_of
&& let Some(def_id) = frame.query.def_id
{
let n = tcx.generics_of(def_id).params.len();
vec![ty::Variance::Bivariant; n].leak()
} else {
span_bug!(
cycle_error.usage.as_ref().unwrap().0,
"only `variances_of` returns `&[ty::Variance]`"
);
}
}
}
// Take a cycle of `Q` and try `try_cycle` on every permutation, falling back to `otherwise`.
fn search_for_cycle_permutation<Q, T>(
cycle: &[Q],

11
src/librustdoc/core.rs
View File

@ -314,21 +314,10 @@ pub(crate) fn run_global_ctxt(
// typeck function bodies or run the default rustc lints.
// (see `override_queries` in the `config`)
// HACK(jynelson) this calls an _extremely_ limited subset of `typeck`
// and might break if queries change their assumptions in the future.
tcx.sess.time("type_collecting", || {
tcx.hir().for_each_module(|module| tcx.ensure().collect_mod_item_types(module))
});
// NOTE: These are copy/pasted from typeck/lib.rs and should be kept in sync with those changes.
let _ = tcx.sess.time("wf_checking", || {
tcx.hir().try_par_for_each_module(|module| tcx.ensure().check_mod_type_wf(module))
});
tcx.sess.time("item_types_checking", || {
tcx.hir().for_each_module(|module| {
let _ = tcx.ensure().check_mod_type_wf(module);
});
});
if let Some(guar) = tcx.dcx().has_errors() {
return Err(guar);

12
tests/rustdoc-ui/issue-110629-private-type-cycle-dyn.stderr
View File

@ -8,17 +8,11 @@ LL | type Bar<'a, 'b> = Box<dyn PartialEq<Bar<'a, 'b>>>;
= note: type aliases cannot be recursive
= help: consider using a struct, enum, or union instead to break the cycle
= help: see <https://doc.rust-lang.org/reference/types.html#recursive-types> for more information
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `Bar` is well-formed
--> $DIR/issue-110629-private-type-cycle-dyn.rs:1:1
|
LL | / type Bar<'a, 'b> = Box<dyn PartialEq<Bar<'a, 'b>>>;
LL | |
LL | |
LL | | fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
... |
LL | | assert!(bar(&meh) == bar(&muh));
LL | | }
| |_^
LL | type Bar<'a, 'b> = Box<dyn PartialEq<Bar<'a, 'b>>>;
| ^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

64
tests/rustdoc-ui/issues/issue-105742.stderr
View File

@ -464,38 +464,6 @@ help: add missing generic argument
LL | Output = <Self as SVec>::Item> as SVec>::Item<T>,
| +++
error[E0107]: missing generics for associated type `SVec::Item`
--> $DIR/issue-105742.rs:61:38
|
LL | fn len(&self) -> <Self as SVec>::Item;
| ^^^^ expected 1 lifetime argument
|
note: associated type defined here, with 1 lifetime parameter: `'a`
--> $DIR/issue-105742.rs:59:10
|
LL | type Item<'a, T>;
| ^^^^ --
help: add missing lifetime argument
|
LL | fn len(&self) -> <Self as SVec>::Item<'_>;
| ++++
error[E0107]: missing generics for associated type `SVec::Item`
--> $DIR/issue-105742.rs:61:38
|
LL | fn len(&self) -> <Self as SVec>::Item;
| ^^^^ expected 1 generic argument
|
note: associated type defined here, with 1 generic parameter: `T`
--> $DIR/issue-105742.rs:59:10
|
LL | type Item<'a, T>;
| ^^^^ -
help: add missing generic argument
|
LL | fn len(&self) -> <Self as SVec>::Item<T>;
| +++
error[E0107]: missing generics for associated type `SVec::Item`
--> $DIR/issue-105742.rs:15:21
|
@ -632,6 +600,38 @@ help: add missing generic argument
LL | Output = <Self as SVec>::Item> as SVec>::Item<T>,
| +++
error[E0107]: missing generics for associated type `SVec::Item`
--> $DIR/issue-105742.rs:61:38
|
LL | fn len(&self) -> <Self as SVec>::Item;
| ^^^^ expected 1 lifetime argument
|
note: associated type defined here, with 1 lifetime parameter: `'a`
--> $DIR/issue-105742.rs:59:10
|
LL | type Item<'a, T>;
| ^^^^ --
help: add missing lifetime argument
|
LL | fn len(&self) -> <Self as SVec>::Item<'_>;
| ++++
error[E0107]: missing generics for associated type `SVec::Item`
--> $DIR/issue-105742.rs:61:38
|
LL | fn len(&self) -> <Self as SVec>::Item;
| ^^^^ expected 1 generic argument
|
note: associated type defined here, with 1 generic parameter: `T`
--> $DIR/issue-105742.rs:59:10
|
LL | type Item<'a, T>;
| ^^^^ -
help: add missing generic argument
|
LL | fn len(&self) -> <Self as SVec>::Item<T>;
| +++
error: aborting due to 37 previous errors
Some errors have detailed explanations: E0038, E0107.

14
tests/ui/associated-inherent-types/bugs/cycle-iat-inside-of-adt.stderr
View File

@ -26,17 +26,11 @@ note: ...which requires computing normalized predicates of `Foo`...
LL | struct Foo {
| ^^^^^^^^^^
= note: ...which again requires computing predicates of `Foo`, completing the cycle
note: cycle used when collecting item types in top-level module
--> $DIR/cycle-iat-inside-of-adt.rs:3:1
note: cycle used when checking that `Foo` is well-formed
--> $DIR/cycle-iat-inside-of-adt.rs:7:1
|
LL | / #![feature(inherent_associated_types)]
LL | | #![allow(incomplete_features)]
LL | | // FIXME(inherent_associated_types): This should pass.
LL | |
... |
LL | |
LL | | fn main() {}
| |____________^
LL | struct Foo {
| ^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

28
tests/ui/associated-inherent-types/bugs/cycle-iat-inside-of-where-predicate.stderr
View File

@ -20,19 +20,23 @@ note: ...which requires computing normalized predicates of `user`...
LL | fn user<T>() where S<T>::P: std::fmt::Debug {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: ...which again requires computing predicates of `user`, completing the cycle
note: cycle used when collecting item types in top-level module
--> $DIR/cycle-iat-inside-of-where-predicate.rs:3:1
note: cycle used when checking that `user` is well-formed
--> $DIR/cycle-iat-inside-of-where-predicate.rs:8:1
|
LL | / #![feature(inherent_associated_types)]
LL | | #![allow(incomplete_features)]
LL | |
LL | | // FIXME(inherent_associated_types): This shouldn't lead to a cycle error.
... |
LL | |
LL | | fn main() {}
| |____________^
LL | fn user<T>() where S<T>::P: std::fmt::Debug {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error
error[E0392]: type parameter `T` is never used
--> $DIR/cycle-iat-inside-of-where-predicate.rs:10:10
|
LL | struct S<T>;
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
For more information about this error, try `rustc --explain E0391`.
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0391, E0392.
For more information about an error, try `rustc --explain E0391`.

20
tests/ui/associated-inherent-types/issue-109071.no_gate.stderr
View File

@ -20,16 +20,6 @@ help: add missing generic argument
LL | impl<T> Windows<T> {
| +++
error[E0658]: inherent associated types are unstable
--> $DIR/issue-109071.rs:8:5
|
LL | type Item = &[T];
| ^^^^^^^^^^^^^^^^^
|
= note: see issue #8995 <https://github.com/rust-lang/rust/issues/8995> for more information
= help: add `#![feature(inherent_associated_types)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0223]: ambiguous associated type
--> $DIR/issue-109071.rs:15:22
|
@ -43,6 +33,16 @@ LL | fn T() -> Option<<Windows<T> as IntoAsyncIterator>::Item> {}
LL | fn T() -> Option<<Windows<T> as IntoIterator>::Item> {}
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error[E0658]: inherent associated types are unstable
--> $DIR/issue-109071.rs:8:5
|
LL | type Item = &[T];
| ^^^^^^^^^^^^^^^^^
|
= note: see issue #8995 <https://github.com/rust-lang/rust/issues/8995> for more information
= help: add `#![feature(inherent_associated_types)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0107, E0223, E0637, E0658.

186
tests/ui/associated-type-bounds/duplicate.stderr
View File

@ -198,6 +198,17 @@ LL | fn FRPIT1() -> impl Iterator<Item: Copy, Item: Send> {
| |
| `Item` bound here first
error[E0282]: type annotations needed
--> $DIR/duplicate.rs:136:5
|
LL | iter::empty()
| ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty`
|
help: consider specifying the generic argument
|
LL | iter::empty::<T>()
| +++++
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:139:42
|
@ -206,6 +217,17 @@ LL | fn FRPIT2() -> impl Iterator<Item: Copy, Item: Copy> {
| |
| `Item` bound here first
error[E0282]: type annotations needed
--> $DIR/duplicate.rs:141:5
|
LL | iter::empty()
| ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty`
|
help: consider specifying the generic argument
|
LL | iter::empty::<T>()
| +++++
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:144:45
|
@ -214,6 +236,17 @@ LL | fn FRPIT3() -> impl Iterator<Item: 'static, Item: 'static> {
| |
| `Item` bound here first
error[E0282]: type annotations needed
--> $DIR/duplicate.rs:146:5
|
LL | iter::empty()
| ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty`
|
help: consider specifying the generic argument
|
LL | iter::empty::<T>()
| +++++
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:149:40
|
@ -376,6 +409,16 @@ LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:197:34
|
LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:201:34
|
@ -394,6 +437,16 @@ LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:201:34
|
LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:205:37
|
@ -412,6 +465,16 @@ LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:205:37
|
LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:211:29
|
@ -454,6 +517,16 @@ LL | Self: Iterator<Item: Copy, Item: Send>,
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:229:32
|
LL | Self: Iterator<Item: Copy, Item: Send>,
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:237:32
|
@ -472,6 +545,16 @@ LL | Self: Iterator<Item: Copy, Item: Copy>,
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:237:32
|
LL | Self: Iterator<Item: Copy, Item: Copy>,
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:245:35
|
@ -490,6 +573,16 @@ LL | Self: Iterator<Item: 'static, Item: 'static>,
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:245:35
|
LL | Self: Iterator<Item: 'static, Item: 'static>,
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:252:34
|
@ -514,99 +607,6 @@ LL | type A: Iterator<Item: 'static, Item: 'static>;
| |
| `Item` bound here first
error[E0282]: type annotations needed
--> $DIR/duplicate.rs:136:5
|
LL | iter::empty()
| ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty`
|
help: consider specifying the generic argument
|
LL | iter::empty::<T>()
| +++++
error[E0282]: type annotations needed
--> $DIR/duplicate.rs:141:5
|
LL | iter::empty()
| ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty`
|
help: consider specifying the generic argument
|
LL | iter::empty::<T>()
| +++++
error[E0282]: type annotations needed
--> $DIR/duplicate.rs:146:5
|
LL | iter::empty()
| ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty`
|
help: consider specifying the generic argument
|
LL | iter::empty::<T>()
| +++++
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:197:34
|
LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:201:34
|
LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:205:37
|
LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:229:32
|
LL | Self: Iterator<Item: Copy, Item: Send>,
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:237:32
|
LL | Self: Iterator<Item: Copy, Item: Copy>,
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/duplicate.rs:245:35
|
LL | Self: Iterator<Item: 'static, Item: 'static>,
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: aborting due to 72 previous errors
Some errors have detailed explanations: E0282, E0719.

34
tests/ui/associated-types/associated-types-in-ambiguous-context.stderr
View File

@ -9,6 +9,23 @@ help: if there were a type named `Example` that implemented `Get`, you could use
LL | fn get<T:Get,U:Get>(x: T, y: U) -> <Example as Get>::Value {}
| ~~~~~~~~~~~~~~~~~~~~~~~
error[E0223]: ambiguous associated type
--> $DIR/associated-types-in-ambiguous-context.rs:13:23
|
LL | fn grab(&self) -> Grab::Value;
| ^^^^^^^^^^^ help: use fully-qualified syntax: `<Self as Grab>::Value`
error[E0223]: ambiguous associated type
--> $DIR/associated-types-in-ambiguous-context.rs:16:22
|
LL | fn get(&self) -> Get::Value;
| ^^^^^^^^^^
|
help: if there were a type named `Example` that implemented `Get`, you could use the fully-qualified path
|
LL | fn get(&self) -> <Example as Get>::Value;
| ~~~~~~~~~~~~~~~~~~~~~~~
error[E0223]: ambiguous associated type
--> $DIR/associated-types-in-ambiguous-context.rs:22:17
|
@ -33,23 +50,6 @@ LL | type X = <OsString as Deref>::Target;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~
and N other candidates
error[E0223]: ambiguous associated type
--> $DIR/associated-types-in-ambiguous-context.rs:13:23
|
LL | fn grab(&self) -> Grab::Value;
| ^^^^^^^^^^^ help: use fully-qualified syntax: `<Self as Grab>::Value`
error[E0223]: ambiguous associated type
--> $DIR/associated-types-in-ambiguous-context.rs:16:22
|
LL | fn get(&self) -> Get::Value;
| ^^^^^^^^^^
|
help: if there were a type named `Example` that implemented `Get`, you could use the fully-qualified path
|
LL | fn get(&self) -> <Example as Get>::Value;
| ~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 5 previous errors
For more information about this error, try `rustc --explain E0223`.

40
tests/ui/const-generics/generic_arg_infer/in-signature.stderr
View File

@ -74,26 +74,6 @@ LL | static TY_STATIC_MIXED: Bar<_, _> = Bar::<i32, 3>(0);
| not allowed in type signatures
| help: replace with the correct type: `Bar<i32, 3>`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/in-signature.rs:35:21
|
LL | const ARR: [u8; _];
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/in-signature.rs:39:25
|
LL | const ARR: Bar<i32, _>;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/in-signature.rs:43:20
|
LL | const ARR: Bar<_, _>;
| ^ ^ not allowed in type signatures
| |
| not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/in-signature.rs:51:23
|
@ -114,6 +94,26 @@ LL | type Assoc = Bar<_, _>;
| |
| not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/in-signature.rs:35:21
|
LL | const ARR: [u8; _];
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/in-signature.rs:39:25
|
LL | const ARR: Bar<i32, _>;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/in-signature.rs:43:20
|
LL | const ARR: Bar<_, _>;
| ^ ^ not allowed in type signatures
| |
| not allowed in type signatures
error: aborting due to 15 previous errors
For more information about this error, try `rustc --explain E0121`.

14
tests/ui/consts/issue-103790.stderr
View File

@ -48,17 +48,11 @@ note: ...which requires computing type of `S::S`...
LL | struct S<const S: (), const S: S = { S }>;
| ^
= note: ...which again requires computing type of `S`, completing the cycle
note: cycle used when collecting item types in top-level module
--> $DIR/issue-103790.rs:1:1
note: cycle used when checking that `S` is well-formed
--> $DIR/issue-103790.rs:4:1
|
LL | / #![feature(generic_const_exprs)]
LL | | #![allow(incomplete_features)]
LL | |
LL | | struct S<const S: (), const S: S = { S }>;
... |
LL | |
LL | | fn main() {}
| |____________^
LL | struct S<const S: (), const S: S = { S }>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: `()` is forbidden as the type of a const generic parameter

14
tests/ui/consts/issue-36163.stderr
View File

@ -20,17 +20,11 @@ note: ...which requires const-evaluating + checking `A`...
LL | const A: isize = Foo::B as isize;
| ^^^^^^^^^^^^^^^
= note: ...which again requires simplifying constant for the type system `Foo::B::{constant#0}`, completing the cycle
note: cycle used when collecting item types in top-level module
--> $DIR/issue-36163.rs:1:1
note: cycle used when checking that `Foo` is well-formed
--> $DIR/issue-36163.rs:3:1
|
LL | / const A: isize = Foo::B as isize;
LL | |
LL | | enum Foo {
LL | | B = A,
LL | | }
LL | |
LL | | fn main() {}
| |____________^
LL | enum Foo {
| ^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

10
tests/ui/cycle-trait/cycle-trait-default-type-trait.stderr
View File

@ -5,15 +5,11 @@ LL | trait Foo<X = Box<dyn Foo>> {
| ^^^
|
= note: ...which immediately requires computing type of `Foo::X` again
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `Foo` is well-formed
--> $DIR/cycle-trait-default-type-trait.rs:4:1
|
LL | / trait Foo<X = Box<dyn Foo>> {
LL | |
LL | | }
LL | |
LL | | fn main() { }
| |_____________^
LL | trait Foo<X = Box<dyn Foo>> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

2
tests/ui/cycle-trait/cycle-trait-supertrait-direct.stderr
View File

@ -5,7 +5,7 @@ LL | trait Chromosome: Chromosome {
| ^^^^^^^^^^
|
= note: ...which immediately requires computing the super predicates of `Chromosome` again
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `Chromosome` is well-formed
--> $DIR/cycle-trait-supertrait-direct.rs:3:1
|
LL | / trait Chromosome: Chromosome {

2
tests/ui/cycle-trait/issue-12511.stderr
View File

@ -10,7 +10,7 @@ note: ...which requires computing the super predicates of `T2`...
LL | trait T2 : T1 {
| ^^
= note: ...which again requires computing the super predicates of `T1`, completing the cycle
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `T1` is well-formed
--> $DIR/issue-12511.rs:1:1
|
LL | / trait T1 : T2 {

42
tests/ui/delegation/not-supported.stderr
View File

@ -70,14 +70,14 @@ LL | fn foo(&self, x: i32) -> i32 { x }
LL | reuse Trait::foo;
| ^^^
error: delegation with early bound generics is not supported yet
error[E0049]: method `foo2` has 0 type parameters but its trait declaration has 1 type parameter
--> $DIR/not-supported.rs:49:22
|
LL | fn foo2<T>(&self, x: T) -> T { x }
| ---------------------------- callee defined here
| - expected 1 type parameter
...
LL | reuse Trait::foo2 { &self.0 }
| ^^^^
| ^^^^ found 0 type parameters
error: delegation with early bound generics is not supported yet
--> $DIR/not-supported.rs:52:29
@ -88,6 +88,15 @@ LL | fn foo3<'a: 'a>(_: &'a u32) {}
LL | reuse <F as Trait>::foo3;
| ^^^^
error[E0195]: lifetime parameters or bounds on method `foo3` do not match the trait declaration
--> $DIR/not-supported.rs:52:29
|
LL | fn foo3<'a: 'a>(_: &'a u32) {}
| -------- lifetimes in impl do not match this method in trait
...
LL | reuse <F as Trait>::foo3;
| ^^^^ lifetimes do not match method in trait
error: delegation with early bound generics is not supported yet
--> $DIR/not-supported.rs:59:22
|
@ -97,6 +106,15 @@ LL | fn foo(&self, x: i32) -> i32 { x }
LL | reuse Trait::foo { &self.0 }
| ^^^
error: delegation with early bound generics is not supported yet
--> $DIR/not-supported.rs:49:22
|
LL | fn foo2<T>(&self, x: T) -> T { x }
| ---------------------------- callee defined here
...
LL | reuse Trait::foo2 { &self.0 }
| ^^^^
error: delegation with early bound generics is not supported yet
--> $DIR/not-supported.rs:74:21
|
@ -160,24 +178,6 @@ LL | pub reuse to_reuse2::foo;
LL | reuse to_reuse1::foo;
| ^^^
error[E0049]: method `foo2` has 0 type parameters but its trait declaration has 1 type parameter
--> $DIR/not-supported.rs:49:22
|
LL | fn foo2<T>(&self, x: T) -> T { x }
| - expected 1 type parameter
...
LL | reuse Trait::foo2 { &self.0 }
| ^^^^ found 0 type parameters
error[E0195]: lifetime parameters or bounds on method `foo3` do not match the trait declaration
--> $DIR/not-supported.rs:52:29
|
LL | fn foo3<'a: 'a>(_: &'a u32) {}
| -------- lifetimes in impl do not match this method in trait
...
LL | reuse <F as Trait>::foo3;
| ^^^^ lifetimes do not match method in trait
error: aborting due to 19 previous errors; 1 warning emitted
Some errors have detailed explanations: E0049, E0195.

44
tests/ui/did_you_mean/bad-assoc-ty.stderr
View File

@ -272,6 +272,17 @@ help: use type parameters instead
LL | struct L<F, T>(F) where F: Fn() -> T;
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/bad-assoc-ty.rs:82:38
|
LL | fn foo<F>(_: F) where F: Fn() -> _ {}
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | fn foo<F, T>(_: F) where F: Fn() -> T {}
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/bad-assoc-ty.rs:62:30
|
@ -305,28 +316,6 @@ help: use type parameters instead
LL | union O<F, T> where F: Fn() -> T {
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for traits
--> $DIR/bad-assoc-ty.rs:77:29
|
LL | trait P<F> where F: Fn() -> _ {
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | trait P<F, T> where F: Fn() -> T {
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/bad-assoc-ty.rs:82:38
|
LL | fn foo<F>(_: F) where F: Fn() -> _ {}
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | fn foo<F, T>(_: F) where F: Fn() -> T {}
| +++ ~
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
--> $DIR/bad-assoc-ty.rs:73:5
|
@ -339,6 +328,17 @@ help: wrap the field type in `ManuallyDrop<...>`
LL | foo: std::mem::ManuallyDrop<F>,
| +++++++++++++++++++++++ +
error[E0121]: the placeholder `_` is not allowed within types on item signatures for traits
--> $DIR/bad-assoc-ty.rs:77:29
|
LL | trait P<F> where F: Fn() -> _ {
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | trait P<F, T> where F: Fn() -> T {
| +++ ~
error: aborting due to 29 previous errors; 1 warning emitted
Some errors have detailed explanations: E0121, E0223, E0740.

20
tests/ui/error-codes/E0719.stderr
View File

@ -16,6 +16,16 @@ LL | trait Foo: Iterator<Item = i32, Item = i32> {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/E0719.rs:1:33
|
LL | trait Foo: Iterator<Item = i32, Item = i32> {}
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/E0719.rs:8:42
|
@ -24,16 +34,6 @@ LL | fn test() -> Box<dyn Iterator<Item = (), Item = Unit>> {
| |
| `Item` bound here first
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/E0719.rs:1:33
|
LL | trait Foo: Iterator<Item = i32, Item = i32> {}
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0719]: the value of the associated type `Item` in trait `Iterator` is already specified
--> $DIR/E0719.rs:14:38
|

16
tests/ui/feature-gates/feature-gate-impl_trait_in_assoc_type.stderr
View File

@ -18,6 +18,14 @@ LL | type Bop = impl std::fmt::Debug;
= help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: unconstrained opaque type
--> $DIR/feature-gate-impl_trait_in_assoc_type.rs:6:16
|
LL | type Bar = impl std::fmt::Debug;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: `Bar` must be used in combination with a concrete type within the same impl
error[E0658]: inherent associated types are unstable
--> $DIR/feature-gate-impl_trait_in_assoc_type.rs:14:5
|
@ -28,14 +36,6 @@ LL | type Bop = impl std::fmt::Debug;
= help: add `#![feature(inherent_associated_types)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: unconstrained opaque type
--> $DIR/feature-gate-impl_trait_in_assoc_type.rs:6:16
|
LL | type Bar = impl std::fmt::Debug;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: `Bar` must be used in combination with a concrete type within the same impl
error: unconstrained opaque type
--> $DIR/feature-gate-impl_trait_in_assoc_type.rs:14:16
|

76
tests/ui/feature-gates/feature-gate-unboxed-closures-manual-impls.stderr
View File

@ -56,26 +56,6 @@ LL | impl Fn<()> for Foo {
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0183]: manual implementations of `FnOnce` are experimental
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
|
LL | impl FnOnce() for Foo1 {
| ^^^^^^^^ manual implementations of `FnOnce` are experimental
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0229]: associated type bindings are not allowed here
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
|
LL | impl FnOnce() for Foo1 {
| ^^^^^^^^ associated type not allowed here
|
help: parenthesized trait syntax expands to `FnOnce<(), Output=()>`
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
|
LL | impl FnOnce() for Foo1 {
| ^^^^^^^^
error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:26:6
|
@ -94,24 +74,6 @@ LL | impl FnMut<()> for Bar {
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
|
LL | impl FnOnce<()> for Baz {
| ^^^^^^^^^^
|
= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0183]: manual implementations of `FnOnce` are experimental
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
|
LL | impl FnOnce<()> for Baz {
| ^^^^^^^^^^ manual implementations of `FnOnce` are experimental
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0277]: expected a `FnMut()` closure, found `Foo`
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:17
|
@ -135,6 +97,44 @@ LL | extern "rust-call" fn call(self, args: ()) -> () {}
= note: expected signature `extern "rust-call" fn(&Foo, ()) -> _`
found signature `extern "rust-call" fn(Foo, ())`
error[E0183]: manual implementations of `FnOnce` are experimental
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
|
LL | impl FnOnce() for Foo1 {
| ^^^^^^^^ manual implementations of `FnOnce` are experimental
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0229]: associated type bindings are not allowed here
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
|
LL | impl FnOnce() for Foo1 {
| ^^^^^^^^ associated type not allowed here
|
help: parenthesized trait syntax expands to `FnOnce<(), Output=()>`
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
|
LL | impl FnOnce() for Foo1 {
| ^^^^^^^^
error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
|
LL | impl FnOnce<()> for Baz {
| ^^^^^^^^^^
|
= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0183]: manual implementations of `FnOnce` are experimental
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
|
LL | impl FnOnce<()> for Baz {
| ^^^^^^^^^^ manual implementations of `FnOnce` are experimental
|
= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
error[E0046]: not all trait items implemented, missing: `Output`
--> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:1
|

40
tests/ui/generic-associated-types/gat-trait-path-missing-lifetime.stderr
View File

@ -1,3 +1,23 @@
error[E0049]: method `foo` has 1 type parameter but its trait declaration has 0 type parameters
--> $DIR/gat-trait-path-missing-lifetime.rs:8:10
|
LL | fn foo<'a>(t : Self::Y<'a>) -> Self::Y<'a> { t }
| -- expected 0 type parameters
...
LL | fn foo<'a, T1: X<Y = T1>>(t : T1) -> T1::Y<'a> {
| ^^ ^^
| |
| found 1 type parameter
error[E0046]: not all trait items implemented, missing: `Y`
--> $DIR/gat-trait-path-missing-lifetime.rs:7:1
|
LL | type Y<'a>;
| ---------- `Y` from trait
...
LL | impl<T> X for T {
| ^^^^^^^^^^^^^^^ missing `Y` in implementation
error[E0107]: missing generics for associated type `X::Y`
--> $DIR/gat-trait-path-missing-lifetime.rs:8:20
|
@ -31,26 +51,6 @@ help: add missing lifetime argument
LL | fn foo<'a, T1: X<Y<'a> = T1>>(t : T1) -> T1::Y<'a> {
| ++++
error[E0049]: method `foo` has 1 type parameter but its trait declaration has 0 type parameters
--> $DIR/gat-trait-path-missing-lifetime.rs:8:10
|
LL | fn foo<'a>(t : Self::Y<'a>) -> Self::Y<'a> { t }
| -- expected 0 type parameters
...
LL | fn foo<'a, T1: X<Y = T1>>(t : T1) -> T1::Y<'a> {
| ^^ ^^
| |
| found 1 type parameter
error[E0046]: not all trait items implemented, missing: `Y`
--> $DIR/gat-trait-path-missing-lifetime.rs:7:1
|
LL | type Y<'a>;
| ---------- `Y` from trait
...
LL | impl<T> X for T {
| ^^^^^^^^^^^^^^^ missing `Y` in implementation
error: lifetime may not live long enough
--> $DIR/gat-trait-path-missing-lifetime.rs:8:3
|

32
tests/ui/generic-associated-types/gat-trait-path-parenthesised-args.stderr
View File

@ -53,22 +53,6 @@ note: associated type defined here, with 0 generic parameters
LL | type Y<'a>;
| ^
error[E0107]: associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
--> $DIR/gat-trait-path-parenthesised-args.rs:18:27
|
LL | fn bar<'a>(arg: Box<dyn X<Y() = ()>>) {}
| ^ expected 1 lifetime argument
|
note: associated type defined here, with 1 lifetime parameter: `'a`
--> $DIR/gat-trait-path-parenthesised-args.rs:2:8
|
LL | type Y<'a>;
| ^ --
help: add missing lifetime argument
|
LL | fn bar<'a>(arg: Box<dyn X<Y('_) = ()>>) {}
| ++
error[E0107]: associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
--> $DIR/gat-trait-path-parenthesised-args.rs:5:27
|
@ -154,6 +138,22 @@ LL | type Y<'a>;
| ^ ...because it contains the generic associated type `Y`
= help: consider moving `Y` to another trait
error[E0107]: associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
--> $DIR/gat-trait-path-parenthesised-args.rs:18:27
|
LL | fn bar<'a>(arg: Box<dyn X<Y() = ()>>) {}
| ^ expected 1 lifetime argument
|
note: associated type defined here, with 1 lifetime parameter: `'a`
--> $DIR/gat-trait-path-parenthesised-args.rs:2:8
|
LL | type Y<'a>;
| ^ --
help: add missing lifetime argument
|
LL | fn bar<'a>(arg: Box<dyn X<Y('_) = ()>>) {}
| ++
error[E0107]: associated type takes 1 lifetime argument but 0 lifetime arguments were supplied
--> $DIR/gat-trait-path-parenthesised-args.rs:18:27
|

22
tests/ui/generic-associated-types/issue-80433.stderr
View File

@ -1,3 +1,14 @@
error: missing required bound on `Output`
--> $DIR/issue-80433.rs:7:5
|
LL | type Output<'a>;
| ^^^^^^^^^^^^^^^-
| |
| help: add the required where clause: `where Self: 'a`
|
= note: this bound is currently required to ensure that impls have maximum flexibility
= note: we are soliciting feedback, see issue #87479 <https://github.com/rust-lang/rust/issues/87479> for more information
error[E0107]: missing generics for associated type `TestMut::Output`
--> $DIR/issue-80433.rs:21:47
|
@ -14,17 +25,6 @@ help: add missing lifetime argument
LL | fn test_simpler<'a>(dst: &'a mut impl TestMut<Output<'a> = &'a mut f32>)
| ++++
error: missing required bound on `Output`
--> $DIR/issue-80433.rs:7:5
|
LL | type Output<'a>;
| ^^^^^^^^^^^^^^^-
| |
| help: add the required where clause: `where Self: 'a`
|
= note: this bound is currently required to ensure that impls have maximum flexibility
= note: we are soliciting feedback, see issue #87479 <https://github.com/rust-lang/rust/issues/87479> for more information
error[E0499]: cannot borrow `*dst` as mutable more than once at a time
--> $DIR/issue-80433.rs:25:10
|

72
tests/ui/generic-associated-types/missing_lifetime_args.stderr
View File

@ -14,42 +14,6 @@ help: add missing lifetime arguments
LL | fn foo<'c, 'd>(_arg: Box<dyn X<Y<'_, '_> = (&'c u32, &'d u32)>>) {}
| ++++++++
error[E0107]: struct takes 3 lifetime arguments but 2 lifetime arguments were supplied
--> $DIR/missing_lifetime_args.rs:17:26
|
LL | fn bar<'a, 'b, 'c>(_arg: Foo<'a, 'b>) {}
| ^^^ -- -- supplied 2 lifetime arguments
| |
| expected 3 lifetime arguments
|
note: struct defined here, with 3 lifetime parameters: `'a`, `'b`, `'c`
--> $DIR/missing_lifetime_args.rs:5:8
|
LL | struct Foo<'a, 'b, 'c> {
| ^^^ -- -- --
help: add missing lifetime argument
|
LL | fn bar<'a, 'b, 'c>(_arg: Foo<'a, 'b, 'a>) {}
| ++++
error[E0107]: struct takes 3 lifetime arguments but 1 lifetime argument was supplied
--> $DIR/missing_lifetime_args.rs:20:16
|
LL | fn f<'a>(_arg: Foo<'a>) {}
| ^^^ -- supplied 1 lifetime argument
| |
| expected 3 lifetime arguments
|
note: struct defined here, with 3 lifetime parameters: `'a`, `'b`, `'c`
--> $DIR/missing_lifetime_args.rs:5:8
|
LL | struct Foo<'a, 'b, 'c> {
| ^^^ -- -- --
help: add missing lifetime arguments
|
LL | fn f<'a>(_arg: Foo<'a, 'a, 'a>) {}
| ++++++++
error[E0107]: missing generics for associated type `X::Y`
--> $DIR/missing_lifetime_args.rs:11:32
|
@ -99,6 +63,42 @@ LL | type Y<'a, 'b>;
| ^ ...because it contains the generic associated type `Y`
= help: consider moving `Y` to another trait
error[E0107]: struct takes 3 lifetime arguments but 2 lifetime arguments were supplied
--> $DIR/missing_lifetime_args.rs:17:26
|
LL | fn bar<'a, 'b, 'c>(_arg: Foo<'a, 'b>) {}
| ^^^ -- -- supplied 2 lifetime arguments
| |
| expected 3 lifetime arguments
|
note: struct defined here, with 3 lifetime parameters: `'a`, `'b`, `'c`
--> $DIR/missing_lifetime_args.rs:5:8
|
LL | struct Foo<'a, 'b, 'c> {
| ^^^ -- -- --
help: add missing lifetime argument
|
LL | fn bar<'a, 'b, 'c>(_arg: Foo<'a, 'b, 'a>) {}
| ++++
error[E0107]: struct takes 3 lifetime arguments but 1 lifetime argument was supplied
--> $DIR/missing_lifetime_args.rs:20:16
|
LL | fn f<'a>(_arg: Foo<'a>) {}
| ^^^ -- supplied 1 lifetime argument
| |
| expected 3 lifetime arguments
|
note: struct defined here, with 3 lifetime parameters: `'a`, `'b`, `'c`
--> $DIR/missing_lifetime_args.rs:5:8
|
LL | struct Foo<'a, 'b, 'c> {
| ^^^ -- -- --
help: add missing lifetime arguments
|
LL | fn f<'a>(_arg: Foo<'a, 'a, 'a>) {}
| ++++++++
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0038, E0107.

8
tests/ui/generic-associated-types/unknown-lifetime-ice-119827.rs
View File

@ -1,16 +1,10 @@
trait Foo {
//~^ ERROR cycle detected
type Context<'c>
where
Self: 'c;
}
impl Foo for Box<dyn Foo> {}
//~^ ERROR `Foo` cannot be made into an object
//~| ERROR `Foo` cannot be made into an object
//~| ERROR cycle detected
//~| ERROR cycle detected
//~| ERROR cycle detected
//~| ERROR the trait bound `Box<(dyn Foo + 'static)>: Foo` is not satisfied
//~| ERROR not all trait items implemented
fn main() {}

115
tests/ui/generic-associated-types/unknown-lifetime-ice-119827.stderr
View File

@ -1,119 +1,22 @@
error[E0391]: cycle detected when computing type of `<impl at $DIR/unknown-lifetime-ice-119827.rs:7:1: 7:26>`
--> $DIR/unknown-lifetime-ice-119827.rs:7:1
|
LL | impl Foo for Box<dyn Foo> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: ...which requires finding trait impls of `Foo`...
error[E0391]: cycle detected when finding trait impls of `Foo`
--> $DIR/unknown-lifetime-ice-119827.rs:1:1
|
LL | trait Foo {
| ^^^^^^^^^
= note: ...which again requires computing type of `<impl at $DIR/unknown-lifetime-ice-119827.rs:7:1: 7:26>`, completing the cycle
note: cycle used when collecting item types in top-level module
--> $DIR/unknown-lifetime-ice-119827.rs:1:1
|
LL | / trait Foo {
LL | | type Context<'c>
LL | | where
LL | | Self: 'c;
... |
LL | |
LL | | fn main() {}
| |____________^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error[E0391]: cycle detected when computing type of `<impl at $DIR/unknown-lifetime-ice-119827.rs:7:1: 7:26>`
--> $DIR/unknown-lifetime-ice-119827.rs:7:1
note: ...which requires computing type of `<impl at $DIR/unknown-lifetime-ice-119827.rs:8:1: 8:26>`...
--> $DIR/unknown-lifetime-ice-119827.rs:8:1
|
LL | impl Foo for Box<dyn Foo> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: ...which immediately requires computing type of `<impl at $DIR/unknown-lifetime-ice-119827.rs:7:1: 7:26>` again
note: cycle used when collecting item types in top-level module
= note: ...which again requires finding trait impls of `Foo`, completing the cycle
note: cycle used when checking that `Foo` is well-formed
--> $DIR/unknown-lifetime-ice-119827.rs:1:1
|
LL | / trait Foo {
LL | | type Context<'c>
LL | | where
LL | | Self: 'c;
... |
LL | |
LL | | fn main() {}
| |____________^
LL | trait Foo {
| ^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error[E0391]: cycle detected when computing type of `<impl at $DIR/unknown-lifetime-ice-119827.rs:7:1: 7:26>`
--> $DIR/unknown-lifetime-ice-119827.rs:7:1
|
LL | impl Foo for Box<dyn Foo> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: ...which immediately requires computing type of `<impl at $DIR/unknown-lifetime-ice-119827.rs:7:1: 7:26>` again
note: cycle used when collecting item types in top-level module
--> $DIR/unknown-lifetime-ice-119827.rs:1:1
|
LL | / trait Foo {
LL | | type Context<'c>
LL | | where
LL | | Self: 'c;
... |
LL | |
LL | | fn main() {}
| |____________^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: aborting due to 1 previous error
error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/unknown-lifetime-ice-119827.rs:7:22
|
LL | impl Foo for Box<dyn Foo> {}
| ^^^ `Foo` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/unknown-lifetime-ice-119827.rs:2:10
|
LL | trait Foo {
| --- this trait cannot be made into an object...
LL | type Context<'c>
| ^^^^^^^ ...because it contains the generic associated type `Context`
= help: consider moving `Context` to another trait
= help: only type `{type error}` implements the trait, consider using it directly instead
error[E0277]: the trait bound `Box<(dyn Foo + 'static)>: Foo` is not satisfied
--> $DIR/unknown-lifetime-ice-119827.rs:7:14
|
LL | impl Foo for Box<dyn Foo> {}
| ^^^^^^^^^^^^ the trait `Foo` is not implemented for `Box<(dyn Foo + 'static)>`
|
= help: the trait `Foo` is implemented for `Box<(dyn Foo + 'static)>`
error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/unknown-lifetime-ice-119827.rs:7:14
|
LL | impl Foo for Box<dyn Foo> {}
| ^^^^^^^^^^^^ `Foo` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/unknown-lifetime-ice-119827.rs:2:10
|
LL | trait Foo {
| --- this trait cannot be made into an object...
LL | type Context<'c>
| ^^^^^^^ ...because it contains the generic associated type `Context`
= help: consider moving `Context` to another trait
= help: only type `std::boxed::Box<(dyn Foo + 'static)>` implements the trait, consider using it directly instead
error[E0046]: not all trait items implemented, missing: `Context`
--> $DIR/unknown-lifetime-ice-119827.rs:7:1
|
LL | type Context<'c>
| ---------------- `Context` from trait
...
LL | impl Foo for Box<dyn Foo> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^ missing `Context` in implementation
error: aborting due to 7 previous errors
Some errors have detailed explanations: E0038, E0046, E0277, E0391.
For more information about an error, try `rustc --explain E0038`.
For more information about this error, try `rustc --explain E0391`.

36
tests/ui/impl-trait/impl-fn-hrtb-bounds.stderr
View File

@ -22,6 +22,15 @@ note: lifetime declared here
LL | fn a() -> impl Fn(&u8) -> (impl Debug + '_) {
| ^
error: lifetime may not live long enough
--> $DIR/impl-fn-hrtb-bounds.rs:6:9
|
LL | |x| x
| -- ^ returning this value requires that `'1` must outlive `'2`
| ||
| |return type of closure is impl Debug + '2
| has type `&'1 u8`
error: higher kinded lifetime bounds on nested opaque types are not supported yet
--> $DIR/impl-fn-hrtb-bounds.rs:10:52
|
@ -34,6 +43,15 @@ note: lifetime declared here
LL | fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
| ^^
error: lifetime may not live long enough
--> $DIR/impl-fn-hrtb-bounds.rs:12:9
|
LL | |x| x
| -- ^ returning this value requires that `'1` must outlive `'2`
| ||
| |return type of closure is impl Debug + '2
| has type `&'1 u8`
error: higher kinded lifetime bounds on nested opaque types are not supported yet
--> $DIR/impl-fn-hrtb-bounds.rs:16:52
|
@ -46,24 +64,6 @@ note: lifetime declared here
LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
| ^^
error: lifetime may not live long enough
--> $DIR/impl-fn-hrtb-bounds.rs:6:9
|
LL | |x| x
| -- ^ returning this value requires that `'1` must outlive `'2`
| ||
| |return type of closure is impl Debug + '2
| has type `&'1 u8`
error: lifetime may not live long enough
--> $DIR/impl-fn-hrtb-bounds.rs:12:9
|
LL | |x| x
| -- ^ returning this value requires that `'1` must outlive `'2`
| ||
| |return type of closure is impl Debug + '2
| has type `&'1 u8`
error: lifetime may not live long enough
--> $DIR/impl-fn-hrtb-bounds.rs:18:9
|

24
tests/ui/impl-trait/issues/issue-88236-2.stderr
View File

@ -22,18 +22,6 @@ note: lifetime declared here
LL | fn make_weird_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
| ^^
error: higher kinded lifetime bounds on nested opaque types are not supported yet
--> $DIR/issue-88236-2.rs:25:78
|
LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
| ^^
|
note: lifetime declared here
--> $DIR/issue-88236-2.rs:25:45
|
LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
| ^^
error: implementation of `Hrtb` is not general enough
--> $DIR/issue-88236-2.rs:20:5
|
@ -52,6 +40,18 @@ LL | &()
= note: `Hrtb<'a>` would have to be implemented for the type `&()`
= note: ...but `Hrtb<'0>` is actually implemented for the type `&'0 ()`, for some specific lifetime `'0`
error: higher kinded lifetime bounds on nested opaque types are not supported yet
--> $DIR/issue-88236-2.rs:25:78
|
LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
| ^^
|
note: lifetime declared here
--> $DIR/issue-88236-2.rs:25:45
|
LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
| ^^
error: lifetime may not live long enough
--> $DIR/issue-88236-2.rs:27:5
|

18
tests/ui/impl-trait/nested-rpit-hrtb.stderr
View File

@ -65,6 +65,15 @@ note: lifetime declared here
LL | fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {}
| ^^
error: implementation of `Bar` is not general enough
--> $DIR/nested-rpit-hrtb.rs:32:78
|
LL | fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {}
| ^^ implementation of `Bar` is not general enough
|
= note: `()` must implement `Bar<'a>`
= note: ...but it actually implements `Bar<'0>`, for some specific lifetime `'0`
error: higher kinded lifetime bounds on nested opaque types are not supported yet
--> $DIR/nested-rpit-hrtb.rs:36:73
|
@ -77,15 +86,6 @@ note: lifetime declared here
LL | fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {}
| ^^
error: implementation of `Bar` is not general enough
--> $DIR/nested-rpit-hrtb.rs:32:78
|
LL | fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {}
| ^^ implementation of `Bar` is not general enough
|
= note: `()` must implement `Bar<'a>`
= note: ...but it actually implements `Bar<'0>`, for some specific lifetime `'0`
error[E0277]: the trait bound `for<'a> &'a (): Qux<'_>` is not satisfied
--> $DIR/nested-rpit-hrtb.rs:36:64
|

38
tests/ui/impl-trait/where-allowed.stderr
View File

@ -342,25 +342,6 @@ LL | let _in_return_in_local_variable = || -> impl Fn() { || {} };
|
= note: `impl Trait` is only allowed in arguments and return types of functions and methods
error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
--> $DIR/where-allowed.rs:239:7
|
LL | impl <T = impl Debug> T {}
| ^^^^^^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
= note: `#[deny(invalid_type_param_default)]` on by default
error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
--> $DIR/where-allowed.rs:246:36
|
LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {}
| ^^^^^^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
error[E0283]: type annotations needed
--> $DIR/where-allowed.rs:46:57
|
@ -381,6 +362,16 @@ LL | fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { pani
- impl<Args, F, A> Fn<Args> for Box<F, A>
where Args: Tuple, F: Fn<Args>, A: Allocator, F: ?Sized;
error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
--> $DIR/where-allowed.rs:239:7
|
LL | impl <T = impl Debug> T {}
| ^^^^^^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
= note: `#[deny(invalid_type_param_default)]` on by default
error[E0118]: no nominal type found for inherent implementation
--> $DIR/where-allowed.rs:239:1
|
@ -428,6 +419,15 @@ LL | type Out = impl Debug;
|
= note: `Out` must be used in combination with a concrete type within the same impl
error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
--> $DIR/where-allowed.rs:246:36
|
LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {}
| ^^^^^^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887>
error: aborting due to 50 previous errors
Some errors have detailed explanations: E0053, E0118, E0283, E0562, E0599, E0658, E0666.

2
tests/ui/infinite/infinite-trait-alias-recursion.stderr
View File

@ -16,7 +16,7 @@ LL | trait T3 = T1 + T3;
| ^^
= note: ...which again requires computing the super predicates of `T1`, completing the cycle
= note: trait aliases cannot be recursive
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `T1` is well-formed
--> $DIR/infinite-trait-alias-recursion.rs:3:1
|
LL | trait T1 = T2;

14
tests/ui/infinite/infinite-type-alias-mutual-recursion.gated.stderr
View File

@ -18,17 +18,11 @@ LL | type X3 = X1;
= note: type aliases cannot be recursive
= help: consider using a struct, enum, or union instead to break the cycle
= help: see <https://doc.rust-lang.org/reference/types.html#recursive-types> for more information
note: cycle used when collecting item types in top-level module
--> $DIR/infinite-type-alias-mutual-recursion.rs:3:1
note: cycle used when checking that `X1` is well-formed
--> $DIR/infinite-type-alias-mutual-recursion.rs:6:1
|
LL | / #![cfg_attr(feature, feature(lazy_type_alias))]
LL | | #![allow(incomplete_features)]
LL | |
LL | | type X1 = X2;
... |
LL | |
LL | | fn main() {}
| |____________^
LL | type X1 = X2;
| ^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

14
tests/ui/infinite/infinite-vec-type-recursion.gated.stderr
View File

@ -8,17 +8,11 @@ LL | type X = Vec<X>;
= note: type aliases cannot be recursive
= help: consider using a struct, enum, or union instead to break the cycle
= help: see <https://doc.rust-lang.org/reference/types.html#recursive-types> for more information
note: cycle used when collecting item types in top-level module
--> $DIR/infinite-vec-type-recursion.rs:3:1
note: cycle used when checking that `X` is well-formed
--> $DIR/infinite-vec-type-recursion.rs:6:1
|
LL | / #![cfg_attr(feature, feature(lazy_type_alias))]
LL | | #![allow(incomplete_features)]
LL | |
LL | | type X = Vec<X>;
... |
LL | | #[rustfmt::skip]
LL | | fn main() { let b: X = Vec::new(); }
| |____________________________________^
LL | type X = Vec<X>;
| ^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

10
tests/ui/issues/issue-23302-enum-infinite-recursion/issue-23302-1.stderr
View File

@ -10,15 +10,11 @@ note: ...which requires const-evaluating + checking `X::A::{constant#0}`...
LL | A = X::A as isize,
| ^^^^^^^^^^^^^
= note: ...which again requires simplifying constant for the type system `X::A::{constant#0}`, completing the cycle
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `X` is well-formed
--> $DIR/issue-23302-1.rs:3:1
|
LL | / enum X {
LL | | A = X::A as isize,
LL | | }
LL | |
LL | | fn main() { }
| |_____________^
LL | enum X {
| ^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

11
tests/ui/issues/issue-23302-enum-infinite-recursion/issue-23302-2.stderr
View File

@ -10,16 +10,11 @@ note: ...which requires const-evaluating + checking `Y::A::{constant#0}`...
LL | A = Y::B as isize,
| ^^^^^^^^^^^^^
= note: ...which again requires simplifying constant for the type system `Y::A::{constant#0}`, completing the cycle
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `Y` is well-formed
--> $DIR/issue-23302-2.rs:3:1
|
LL | / enum Y {
LL | | A = Y::B as isize,
LL | | B,
LL | | }
LL | |
LL | | fn main() { }
| |_____________^
LL | enum Y {
| ^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

14
tests/ui/issues/issue-34373.stderr
View File

@ -10,17 +10,11 @@ note: ...which requires expanding type alias `DefaultFoo`...
LL | type DefaultFoo = Foo;
| ^^^
= note: ...which again requires computing type of `Foo::T`, completing the cycle
note: cycle used when collecting item types in top-level module
--> $DIR/issue-34373.rs:1:1
note: cycle used when checking that `Foo` is well-formed
--> $DIR/issue-34373.rs:7:1
|
LL | / #![allow(warnings)]
LL | |
LL | | trait Trait<T> {
LL | | fn foo(_: T) {}
... |
LL | | fn main() {
LL | | }
| |_^
LL | pub struct Foo<T = Box<Trait<DefaultFoo>>>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error[E0038]: the trait `Trait` cannot be made into an object

12
tests/ui/lifetimes/issue-95023.stderr
View File

@ -32,12 +32,6 @@ help: parenthesized trait syntax expands to `Fn<(&isize,), Output=()>`
LL | impl Fn(&isize) for Error {
| ^^^^^^^^^^
error[E0220]: associated type `B` not found for `Self`
--> $DIR/issue-95023.rs:8:44
|
LL | fn foo<const N: usize>(&self) -> Self::B<{ N }>;
| ^ help: `Self` has the following associated type: `Output`
error[E0277]: expected a `FnMut(&isize)` closure, found `Error`
--> $DIR/issue-95023.rs:3:21
|
@ -56,6 +50,12 @@ LL | impl Fn(&isize) for Error {
|
= help: implement the missing item: `fn call(&self, _: (&isize,)) -> <Self as FnOnce<(&isize,)>>::Output { todo!() }`
error[E0220]: associated type `B` not found for `Self`
--> $DIR/issue-95023.rs:8:44
|
LL | fn foo<const N: usize>(&self) -> Self::B<{ N }>;
| ^ help: `Self` has the following associated type: `Output`
error[E0220]: associated type `B` not found for `Self`
--> $DIR/issue-95023.rs:8:44
|

32
tests/ui/lifetimes/missing-lifetime-in-alias.stderr
View File

@ -25,22 +25,6 @@ help: consider using one of the available lifetimes here
LL | type C<'a, 'b> = <A<'a> as Trait<'lifetime>>::Bar;
| +++++++++++
error[E0107]: missing generics for associated type `Trait::Bar`
--> $DIR/missing-lifetime-in-alias.rs:27:36
|
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar;
| ^^^ expected 1 lifetime argument
|
note: associated type defined here, with 1 lifetime parameter: `'b`
--> $DIR/missing-lifetime-in-alias.rs:4:10
|
LL | type Bar<'b>
| ^^^ --
help: add missing lifetime argument
|
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar<'a>;
| ++++
error[E0477]: the type `Impl<'a>` does not fulfill the required lifetime
--> $DIR/missing-lifetime-in-alias.rs:16:20
|
@ -60,6 +44,22 @@ help: copy the `where` clause predicates from the trait
LL | type Bar<'b> = &'b () where Self: 'b;
| ++++++++++++++
error[E0107]: missing generics for associated type `Trait::Bar`
--> $DIR/missing-lifetime-in-alias.rs:27:36
|
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar;
| ^^^ expected 1 lifetime argument
|
note: associated type defined here, with 1 lifetime parameter: `'b`
--> $DIR/missing-lifetime-in-alias.rs:4:10
|
LL | type Bar<'b>
| ^^^ --
help: add missing lifetime argument
|
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar<'a>;
| ++++
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0106, E0107, E0477.

36
tests/ui/object-safety/object-safety-supertrait-mentions-Self.stderr
View File

@ -1,21 +1,3 @@
error[E0038]: the trait `Baz` cannot be made into an object
--> $DIR/object-safety-supertrait-mentions-Self.rs:16:31
|
LL | fn make_baz<T:Baz>(t: &T) -> &dyn Baz {
| ^^^^^^^ `Baz` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/object-safety-supertrait-mentions-Self.rs:8:13
|
LL | trait Baz : Bar<Self> {
| --- ^^^^^^^^^ ...because it uses `Self` as a type parameter
| |
| this trait cannot be made into an object...
help: consider using an opaque type instead
|
LL | fn make_baz<T:Baz>(t: &T) -> &impl Baz {
| ~~~~
error[E0277]: the size for values of type `Self` cannot be known at compilation time
--> $DIR/object-safety-supertrait-mentions-Self.rs:8:13
|
@ -36,6 +18,24 @@ help: consider relaxing the implicit `Sized` restriction
LL | trait Bar<T: ?Sized> {
| ++++++++
error[E0038]: the trait `Baz` cannot be made into an object
--> $DIR/object-safety-supertrait-mentions-Self.rs:16:31
|
LL | fn make_baz<T:Baz>(t: &T) -> &dyn Baz {
| ^^^^^^^ `Baz` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/object-safety-supertrait-mentions-Self.rs:8:13
|
LL | trait Baz : Bar<Self> {
| --- ^^^^^^^^^ ...because it uses `Self` as a type parameter
| |
| this trait cannot be made into an object...
help: consider using an opaque type instead
|
LL | fn make_baz<T:Baz>(t: &T) -> &impl Baz {
| ~~~~
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0038, E0277.

34
tests/ui/resolve/resolve-self-in-impl.stderr
View File

@ -14,6 +14,20 @@ LL | impl Tr for S<Self> {}
|
= note: replace `Self` with a different type
error[E0391]: cycle detected when computing trait implemented by `<impl at $DIR/resolve-self-in-impl.rs:19:1: 19:23>`
--> $DIR/resolve-self-in-impl.rs:19:1
|
LL | impl Tr<Self::A> for S {}
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: ...which immediately requires computing trait implemented by `<impl at $DIR/resolve-self-in-impl.rs:19:1: 19:23>` again
note: cycle used when building specialization graph of trait `Tr`
--> $DIR/resolve-self-in-impl.rs:4:1
|
LL | trait Tr<T = u8> {
| ^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: `Self` is not valid in the self type of an impl block
--> $DIR/resolve-self-in-impl.rs:16:6
|
@ -38,26 +52,6 @@ LL | impl (Self, Self) {}
|
= note: replace `Self` with a different type
error[E0391]: cycle detected when computing trait implemented by `<impl at $DIR/resolve-self-in-impl.rs:19:1: 19:23>`
--> $DIR/resolve-self-in-impl.rs:19:1
|
LL | impl Tr<Self::A> for S {}
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: ...which immediately requires computing trait implemented by `<impl at $DIR/resolve-self-in-impl.rs:19:1: 19:23>` again
note: cycle used when collecting item types in top-level module
--> $DIR/resolve-self-in-impl.rs:1:1
|
LL | / #![feature(associated_type_defaults)]
LL | |
LL | | struct S<T = u8>(T);
LL | | trait Tr<T = u8> {
... |
LL | |
LL | | fn main() {}
| |____________^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 6 previous errors
For more information about this error, try `rustc --explain E0391`.

18
tests/ui/rfcs/rfc-2396-target_feature-11/trait-impl.stderr
View File

@ -1,12 +1,3 @@
error: `#[target_feature(..)]` cannot be applied to safe trait method
--> $DIR/trait-impl.rs:22:5
|
LL | #[target_feature(enable = "sse2")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot be applied to safe trait method
LL |
LL | fn foo(&self) {}
| ------------- not an `unsafe` function
error: `#[target_feature(..)]` cannot be applied to safe trait method
--> $DIR/trait-impl.rs:13:5
|
@ -16,5 +7,14 @@ LL |
LL | fn foo(&self) {}
| ------------- not an `unsafe` function
error: `#[target_feature(..)]` cannot be applied to safe trait method
--> $DIR/trait-impl.rs:22:5
|
LL | #[target_feature(enable = "sse2")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot be applied to safe trait method
LL |
LL | fn foo(&self) {}
| ------------- not an `unsafe` function
error: aborting due to 2 previous errors

18
tests/ui/rfcs/rfc-2632-const-trait-impl/const_derives/derive-const-use.stderr
View File

@ -13,6 +13,15 @@ LL | impl const Default for A {
= note: marking a trait with `#[const_trait]` ensures all default method bodies are `const`
= note: adding a non-const method body in the future would be a breaking change
error[E0207]: the const parameter `host` is not constrained by the impl trait, self type, or predicates
--> $DIR/derive-const-use.rs:7:6
|
LL | impl const Default for A {
| ^^^^^ unconstrained const parameter
|
= note: expressions using a const parameter must map each value to a distinct output value
= note: proving the result of expressions other than the parameter are unique is not supported
error: const `impl` for trait `Default` which is not marked with `#[const_trait]`
--> $DIR/derive-const-use.rs:15:16
|
@ -23,15 +32,6 @@ LL | #[derive_const(Default, PartialEq)]
= note: adding a non-const method body in the future would be a breaking change
= note: this error originates in the derive macro `Default` (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0207]: the const parameter `host` is not constrained by the impl trait, self type, or predicates
--> $DIR/derive-const-use.rs:7:6
|
LL | impl const Default for A {
| ^^^^^ unconstrained const parameter
|
= note: expressions using a const parameter must map each value to a distinct output value
= note: proving the result of expressions other than the parameter are unique is not supported
error[E0207]: the const parameter `host` is not constrained by the impl trait, self type, or predicates
|
= note: expressions using a const parameter must map each value to a distinct output value

12
tests/ui/rfcs/rfc-2632-const-trait-impl/super-traits-fail-3.nn.stderr
View File

@ -24,12 +24,6 @@ LL | trait Bar: ~const Foo {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/super-traits-fail-3.rs:18:24
|
LL | const fn foo<T: ~const Bar>(x: &T) {
| ^^^
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/super-traits-fail-3.rs:12:19
|
@ -38,5 +32,11 @@ LL | trait Bar: ~const Foo {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: `~const` can only be applied to `#[const_trait]` traits
--> $DIR/super-traits-fail-3.rs:18:24
|
LL | const fn foo<T: ~const Bar>(x: &T) {
| ^^^
error: aborting due to 5 previous errors

20
tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-invalid-places.stderr
View File

@ -262,16 +262,6 @@ LL | const CONSTANT<T: ~const Trait>: () = ();
= help: add `#![feature(generic_const_items)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0658]: inherent associated types are unstable
--> $DIR/tilde-const-invalid-places.rs:44:5
|
LL | type Type<T: ~const Trait> = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #8995 <https://github.com/rust-lang/rust/issues/8995> for more information
= help: add `#![feature(inherent_associated_types)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0392]: type parameter `T` is never used
--> $DIR/tilde-const-invalid-places.rs:11:19
|
@ -304,6 +294,16 @@ note: required by a bound in `NonConstTrait::Type`
LL | type Type<T: ~const Trait>: ~const Trait;
| ^^^^^^^^^^^^ required by this bound in `NonConstTrait::Type`
error[E0658]: inherent associated types are unstable
--> $DIR/tilde-const-invalid-places.rs:44:5
|
LL | type Type<T: ~const Trait> = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #8995 <https://github.com/rust-lang/rust/issues/8995> for more information
= help: add `#![feature(inherent_associated_types)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 30 previous errors
Some errors have detailed explanations: E0275, E0392, E0658, E0740.

1
tests/ui/span/issue-35987.rs
View File

@ -7,6 +7,7 @@ impl<T: Clone, Add> Add for Foo<T> {
type Output = usize;
fn add(self, rhs: Self) -> Self::Output {
//~^ ERROR ambiguous associated type
unimplemented!();
}
}

18
tests/ui/span/issue-35987.stderr
View File

@ -9,6 +9,20 @@ LL | impl<T: Clone, Add> Add for Foo<T> {
| |
| found this type parameter
error: aborting due to 1 previous error
error[E0223]: ambiguous associated type
--> $DIR/issue-35987.rs:9:32
|
LL | fn add(self, rhs: Self) -> Self::Output {
| ^^^^^^^^^^^^
|
help: use fully-qualified syntax
|
LL | fn add(self, rhs: Self) -> <Foo<T> as BitOr>::Output {
| ~~~~~~~~~~~~~~~~~~~~~~~~~
LL | fn add(self, rhs: Self) -> <Foo<T> as IntoFuture>::Output {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For more information about this error, try `rustc --explain E0404`.
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0223, E0404.
For more information about an error, try `rustc --explain E0223`.

32
tests/ui/suggestions/impl-trait-missing-lifetime-gated.stderr
View File

@ -150,6 +150,14 @@ help: consider introducing a named lifetime parameter
LL | fn g<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&()> { x.next() }
| ++++ ++
error: lifetime may not live long enough
--> $DIR/impl-trait-missing-lifetime-gated.rs:19:67
|
LL | async fn i(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
| ----------------------------------------------------------- ^^^^^^^^ returning this value requires that `'1` must outlive `'static`
| |
| return type `impl Future<Output = Option<&'static ()>>` contains a lifetime `'1`
error[E0658]: anonymous lifetimes in `impl Trait` are unstable
--> $DIR/impl-trait-missing-lifetime-gated.rs:25:35
|
@ -176,6 +184,14 @@ help: consider introducing a named lifetime parameter
LL | fn g<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'_ ()> { x.next() }
| ++++ ~~
error: lifetime may not live long enough
--> $DIR/impl-trait-missing-lifetime-gated.rs:38:73
|
LL | async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
| ----------------------------------------------------------------- ^^^^^^^^ returning this value requires that `'1` must outlive `'static`
| |
| return type `impl Future<Output = Option<&'static ()>>` contains a lifetime `'1`
error[E0658]: anonymous lifetimes in `impl Trait` are unstable
--> $DIR/impl-trait-missing-lifetime-gated.rs:46:18
|
@ -228,22 +244,6 @@ help: consider introducing a named lifetime parameter
LL | fn g<'a>(mut x: impl Foo<'a, ()>) -> Option<&()> { x.next() }
| ++++ +++
error: lifetime may not live long enough
--> $DIR/impl-trait-missing-lifetime-gated.rs:19:67
|
LL | async fn i(mut x: impl Iterator<Item = &()>) -> Option<&()> { x.next() }
| ----------------------------------------------------------- ^^^^^^^^ returning this value requires that `'1` must outlive `'static`
| |
| return type `impl Future<Output = Option<&'static ()>>` contains a lifetime `'1`
error: lifetime may not live long enough
--> $DIR/impl-trait-missing-lifetime-gated.rs:38:73
|
LL | async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
| ----------------------------------------------------------------- ^^^^^^^^ returning this value requires that `'1` must outlive `'static`
| |
| return type `impl Future<Output = Option<&'static ()>>` contains a lifetime `'1`
error: aborting due to 16 previous errors
Some errors have detailed explanations: E0106, E0658.

74
tests/ui/suggestions/suggest-blanket-impl-local-trait.stderr
View File

@ -1,40 +1,3 @@
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:13:24
|
LL | impl LocalTraitTwo for LocalTraitOne {}
| ^^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl LocalTraitTwo for dyn LocalTraitOne {}
| +++
help: alternatively use a blanket implementation to implement `LocalTraitTwo` for all types that also implement `LocalTraitOne`
|
LL | impl<T: LocalTraitOne> LocalTraitTwo for T {}
| ++++++++++++++++++ ~
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:18:23
|
LL | impl fmt::Display for LocalTraitOne {
| ^^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl fmt::Display for dyn LocalTraitOne {
| +++
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:26:23
|
LL | impl fmt::Display for LocalTraitTwo + Send {
| ^^^^^^^^^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl fmt::Display for dyn LocalTraitTwo + Send {
| +++
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:34:24
|
@ -65,6 +28,21 @@ help: alternatively use a blanket implementation to implement `LocalTraitOne` fo
LL | impl<T: fmt::Display + Send> LocalTraitOne for T {}
| ++++++++++++++++++++++++ ~
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:13:24
|
LL | impl LocalTraitTwo for LocalTraitOne {}
| ^^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl LocalTraitTwo for dyn LocalTraitOne {}
| +++
help: alternatively use a blanket implementation to implement `LocalTraitTwo` for all types that also implement `LocalTraitOne`
|
LL | impl<T: LocalTraitOne> LocalTraitTwo for T {}
| ++++++++++++++++++ ~
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:46:29
|
@ -80,6 +58,28 @@ help: alternatively use a blanket implementation to implement `GenericTrait<E>`
LL | impl<E, T: LocalTraitOne> GenericTrait<E> for T {}
| ++++++++++++++++++ ~
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:18:23
|
LL | impl fmt::Display for LocalTraitOne {
| ^^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl fmt::Display for dyn LocalTraitOne {
| +++
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:26:23
|
LL | impl fmt::Display for LocalTraitTwo + Send {
| ^^^^^^^^^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl fmt::Display for dyn LocalTraitTwo + Send {
| +++
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-blanket-impl-local-trait.rs:53:35
|

5
tests/ui/suggestions/suggest-swapping-self-ty-and-trait-edition-2021.rs
View File

@ -3,9 +3,12 @@
pub trait Trait<'a, T> {}
pub struct Struct<T>;
//~^ ERROR `T` is never used
pub enum Enum<T> {}
//~^ ERROR `T` is never used
pub union Union<T> {
//~^ ERROR `T` is never used
f1: usize,
}
@ -15,8 +18,10 @@ impl<'a, T> Struct<T> for Trait<'a, T> {}
impl<'a, T> Enum<T> for Trait<'a, T> {}
//~^ ERROR expected trait, found enum `Enum`
//~| ERROR trait objects must include the `dyn` keyword
impl<'a, T> Union<T> for Trait<'a, T> {}
//~^ ERROR expected trait, found union `Union`
//~| ERROR trait objects must include the `dyn` keyword
fn main() {}

63
tests/ui/suggestions/suggest-swapping-self-ty-and-trait-edition-2021.stderr
View File

@ -1,5 +1,5 @@
error[E0404]: expected trait, found struct `Struct`
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:12:13
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:15:13
|
LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
| ^^^^^^^^^ not a trait
@ -10,7 +10,7 @@ LL | impl<'a, T> Trait<'a, T> for Struct<T> {}
| ~~~~~~~~~~~~ ~~~~~~~~~
error[E0404]: expected trait, found enum `Enum`
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:16:13
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:19:13
|
LL | impl<'a, T> Enum<T> for Trait<'a, T> {}
| ^^^^^^^ not a trait
@ -21,7 +21,7 @@ LL | impl<'a, T> Trait<'a, T> for Enum<T> {}
| ~~~~~~~~~~~~ ~~~~~~~
error[E0404]: expected trait, found union `Union`
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:19:13
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:23:13
|
LL | impl<'a, T> Union<T> for Trait<'a, T> {}
| ^^^^^^^^ not a trait
@ -31,8 +31,35 @@ help: `impl` items mention the trait being implemented first and the type it is
LL | impl<'a, T> Trait<'a, T> for Union<T> {}
| ~~~~~~~~~~~~ ~~~~~~~~
error[E0392]: type parameter `T` is never used
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:5:19
|
LL | pub struct Struct<T>;
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
error[E0392]: type parameter `T` is never used
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:7:15
|
LL | pub enum Enum<T> {}
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
error[E0392]: type parameter `T` is never used
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:10:17
|
LL | pub union Union<T> {
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:12:27
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:15:27
|
LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
| ^^^^^^^^^^^^
@ -42,7 +69,29 @@ help: add `dyn` keyword before this trait
LL | impl<'a, T> Struct<T> for dyn Trait<'a, T> {}
| +++
error: aborting due to 4 previous errors
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:19:25
|
LL | impl<'a, T> Enum<T> for Trait<'a, T> {}
| ^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl<'a, T> Enum<T> for dyn Trait<'a, T> {}
| +++
Some errors have detailed explanations: E0404, E0782.
For more information about an error, try `rustc --explain E0404`.
error[E0782]: trait objects must include the `dyn` keyword
--> $DIR/suggest-swapping-self-ty-and-trait-edition-2021.rs:23:26
|
LL | impl<'a, T> Union<T> for Trait<'a, T> {}
| ^^^^^^^^^^^^
|
help: add `dyn` keyword before this trait
|
LL | impl<'a, T> Union<T> for dyn Trait<'a, T> {}
| +++
error: aborting due to 9 previous errors
Some errors have detailed explanations: E0392, E0404, E0782.
For more information about an error, try `rustc --explain E0392`.

7
tests/ui/suggestions/suggest-swapping-self-ty-and-trait.rs
View File

@ -1,9 +1,12 @@
pub trait Trait<'a, T> {}
pub struct Struct<T>;
//~^ ERROR `T` is never used
pub enum Enum<T> {}
//~^ ERROR `T` is never used
pub union Union<T> {
//~^ ERROR `T` is never used
f1: usize,
}
@ -14,8 +17,12 @@ impl<'a, T> Struct<T> for Trait<'a, T> {}
impl<'a, T> Enum<T> for Trait<'a, T> {}
//~^ ERROR expected trait, found enum `Enum`
//~| WARNING trait objects without an explicit `dyn` are deprecated
//~| WARNING this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
impl<'a, T> Union<T> for Trait<'a, T> {}
//~^ ERROR expected trait, found union `Union`
//~| WARNING trait objects without an explicit `dyn` are deprecated
//~| WARNING this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
fn main() {}

66
tests/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr
View File

@ -1,5 +1,5 @@
error[E0404]: expected trait, found struct `Struct`
--> $DIR/suggest-swapping-self-ty-and-trait.rs:10:13
--> $DIR/suggest-swapping-self-ty-and-trait.rs:13:13
|
LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
| ^^^^^^^^^ not a trait
@ -10,7 +10,7 @@ LL | impl<'a, T> Trait<'a, T> for Struct<T> {}
| ~~~~~~~~~~~~ ~~~~~~~~~
error[E0404]: expected trait, found enum `Enum`
--> $DIR/suggest-swapping-self-ty-and-trait.rs:15:13
--> $DIR/suggest-swapping-self-ty-and-trait.rs:18:13
|
LL | impl<'a, T> Enum<T> for Trait<'a, T> {}
| ^^^^^^^ not a trait
@ -21,7 +21,7 @@ LL | impl<'a, T> Trait<'a, T> for Enum<T> {}
| ~~~~~~~~~~~~ ~~~~~~~
error[E0404]: expected trait, found union `Union`
--> $DIR/suggest-swapping-self-ty-and-trait.rs:18:13
--> $DIR/suggest-swapping-self-ty-and-trait.rs:23:13
|
LL | impl<'a, T> Union<T> for Trait<'a, T> {}
| ^^^^^^^^ not a trait
@ -31,8 +31,35 @@ help: `impl` items mention the trait being implemented first and the type it is
LL | impl<'a, T> Trait<'a, T> for Union<T> {}
| ~~~~~~~~~~~~ ~~~~~~~~
error[E0392]: type parameter `T` is never used
--> $DIR/suggest-swapping-self-ty-and-trait.rs:3:19
|
LL | pub struct Struct<T>;
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
error[E0392]: type parameter `T` is never used
--> $DIR/suggest-swapping-self-ty-and-trait.rs:5:15
|
LL | pub enum Enum<T> {}
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
error[E0392]: type parameter `T` is never used
--> $DIR/suggest-swapping-self-ty-and-trait.rs:8:17
|
LL | pub union Union<T> {
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/suggest-swapping-self-ty-and-trait.rs:10:27
--> $DIR/suggest-swapping-self-ty-and-trait.rs:13:27
|
LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
| ^^^^^^^^^^^^
@ -45,6 +72,33 @@ help: if this is an object-safe trait, use `dyn`
LL | impl<'a, T> Struct<T> for dyn Trait<'a, T> {}
| +++
error: aborting due to 3 previous errors; 1 warning emitted
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/suggest-swapping-self-ty-and-trait.rs:18:25
|
LL | impl<'a, T> Enum<T> for Trait<'a, T> {}
| ^^^^^^^^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
|
LL | impl<'a, T> Enum<T> for dyn Trait<'a, T> {}
| +++
For more information about this error, try `rustc --explain E0404`.
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/suggest-swapping-self-ty-and-trait.rs:23:26
|
LL | impl<'a, T> Union<T> for Trait<'a, T> {}
| ^^^^^^^^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
|
LL | impl<'a, T> Union<T> for dyn Trait<'a, T> {}
| +++
error: aborting due to 6 previous errors; 3 warnings emitted
Some errors have detailed explanations: E0392, E0404.
For more information about an error, try `rustc --explain E0392`.

18
tests/ui/tag-type-args.stderr
View File

@ -1,3 +1,12 @@
error[E0392]: type parameter `T` is never used
--> $DIR/tag-type-args.rs:1:11
|
LL | enum Quux<T> { Bar }
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
error[E0107]: missing generics for enum `Quux`
--> $DIR/tag-type-args.rs:4:11
|
@ -14,15 +23,6 @@ help: add missing generic argument
LL | fn foo(c: Quux<T>) { assert!((false)); }
| +++
error[E0392]: type parameter `T` is never used
--> $DIR/tag-type-args.rs:1:11
|
LL | enum Quux<T> { Bar }
| ^ unused type parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `T` to be a const parameter, use `const T: /* Type */` instead
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0107, E0392.

18
tests/ui/target-feature/invalid-attribute.stderr
View File

@ -183,6 +183,15 @@ error: cannot use `#[inline(always)]` with `#[target_feature]`
LL | #[inline(always)]
| ^^^^^^^^^^^^^^^^^
error[E0046]: not all trait items implemented, missing: `foo`
--> $DIR/invalid-attribute.rs:88:1
|
LL | impl Quux for u8 {}
| ^^^^^^^^^^^^^^^^ missing `foo` in implementation
...
LL | fn foo();
| --------- `foo` from trait
error[E0658]: `#[target_feature(..)]` can only be applied to `unsafe` functions
--> $DIR/invalid-attribute.rs:103:5
|
@ -196,15 +205,6 @@ LL | fn foo() {}
= help: add `#![feature(target_feature_11)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0046]: not all trait items implemented, missing: `foo`
--> $DIR/invalid-attribute.rs:88:1
|
LL | impl Quux for u8 {}
| ^^^^^^^^^^^^^^^^ missing `foo` in implementation
...
LL | fn foo();
| --------- `foo` from trait
error: aborting due to 23 previous errors
Some errors have detailed explanations: E0046, E0658.

36
tests/ui/traits/associated_type_bound/116464-invalid-assoc-type-suggestion-in-trait-impl.stderr
View File

@ -1,3 +1,9 @@
error[E0207]: the type parameter `S` is not constrained by the impl trait, self type, or predicates
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:9:9
|
LL | impl<T, S> Trait<T> for i32 {
| ^ unconstrained type parameter
error[E0107]: trait takes 1 generic argument but 2 generic arguments were supplied
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:15:12
|
@ -10,6 +16,12 @@ note: trait defined here, with 1 generic parameter: `T`
LL | pub trait Trait<T> {
| ^^^^^ -
error[E0207]: the type parameter `S` is not constrained by the impl trait, self type, or predicates
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:15:9
|
LL | impl<T, S> Trait<T, S> for () {}
| ^ unconstrained type parameter
error[E0107]: trait takes 1 generic argument but 2 generic arguments were supplied
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:20:12
|
@ -42,6 +54,12 @@ help: replace the generic bound with the associated type
LL | fn func<T: Trait<u32, String>>(t: T) -> impl Trait<(), Assoc = i32> {
| +++++++
error[E0282]: type annotations needed
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:20:41
|
LL | fn func<T: Trait<u32, String>>(t: T) -> impl Trait<(), i32> {
| ^^^^^^^^^^^^^^^^^^^ cannot infer type
error[E0107]: trait takes 1 generic argument but 2 generic arguments were supplied
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:27:18
|
@ -104,24 +122,6 @@ note: struct defined here, with 1 generic parameter: `T`
LL | struct Struct<T: Trait<u32, String>> {
| ^^^^^^ -
error[E0207]: the type parameter `S` is not constrained by the impl trait, self type, or predicates
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:9:9
|
LL | impl<T, S> Trait<T> for i32 {
| ^ unconstrained type parameter
error[E0207]: the type parameter `S` is not constrained by the impl trait, self type, or predicates
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:15:9
|
LL | impl<T, S> Trait<T, S> for () {}
| ^ unconstrained type parameter
error[E0282]: type annotations needed
--> $DIR/116464-invalid-assoc-type-suggestion-in-trait-impl.rs:20:41
|
LL | fn func<T: Trait<u32, String>>(t: T) -> impl Trait<(), i32> {
| ^^^^^^^^^^^^^^^^^^^ cannot infer type
error: aborting due to 10 previous errors
Some errors have detailed explanations: E0107, E0207, E0282.

40
tests/ui/traits/issue-28576.stderr
View File

@ -1,3 +1,23 @@
error[E0277]: the size for values of type `Self` cannot be known at compilation time
--> $DIR/issue-28576.rs:5:16
|
LL | pub trait Bar: Foo<Assoc=()> {
| ^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
note: required by an implicit `Sized` bound in `Foo`
--> $DIR/issue-28576.rs:1:15
|
LL | pub trait Foo<RHS=Self> {
| ^^^^^^^^ required by the implicit `Sized` requirement on this type parameter in `Foo`
help: consider further restricting `Self`
|
LL | pub trait Bar: Foo<Assoc=()> + Sized {
| +++++++
help: consider relaxing the implicit `Sized` restriction
|
LL | pub trait Foo<RHS: ?Sized=Self> {
| ++++++++
error[E0038]: the trait `Bar` cannot be made into an object
--> $DIR/issue-28576.rs:9:12
|
@ -19,26 +39,6 @@ help: consider using an opaque type instead
LL | impl Bar
| ~~~~
error[E0277]: the size for values of type `Self` cannot be known at compilation time
--> $DIR/issue-28576.rs:5:16
|
LL | pub trait Bar: Foo<Assoc=()> {
| ^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
note: required by an implicit `Sized` bound in `Foo`
--> $DIR/issue-28576.rs:1:15
|
LL | pub trait Foo<RHS=Self> {
| ^^^^^^^^ required by the implicit `Sized` requirement on this type parameter in `Foo`
help: consider further restricting `Self`
|
LL | pub trait Bar: Foo<Assoc=()> + Sized {
| +++++++
help: consider relaxing the implicit `Sized` restriction
|
LL | pub trait Foo<RHS: ?Sized=Self> {
| ++++++++
error[E0277]: the size for values of type `Self` cannot be known at compilation time
--> $DIR/issue-28576.rs:5:16
|

1
tests/ui/traits/trait-upcasting/cyclic-trait-resolution.rs
View File

@ -1,5 +1,6 @@
trait A: B + A {}
//~^ ERROR cycle detected when computing the super predicates of `A` [E0391]
//~| ERROR cycle detected when computing the implied predicates of `A` [E0391]
trait B {}

18
tests/ui/traits/trait-upcasting/cyclic-trait-resolution.stderr
View File

@ -5,13 +5,27 @@ LL | trait A: B + A {}
| ^
|
= note: ...which immediately requires computing the super predicates of `A` again
note: cycle used when collecting item types in top-level module
note: cycle used when checking that `A` is well-formed
--> $DIR/cyclic-trait-resolution.rs:1:1
|
LL | trait A: B + A {}
| ^^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error
error[E0391]: cycle detected when computing the implied predicates of `A`
--> $DIR/cyclic-trait-resolution.rs:1:14
|
LL | trait A: B + A {}
| ^
|
= note: ...which immediately requires computing the implied predicates of `A` again
note: cycle used when checking that `<impl at $DIR/cyclic-trait-resolution.rs:7:1: 7:14>` is well-formed
--> $DIR/cyclic-trait-resolution.rs:7:1
|
LL | impl A for () {}
| ^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0391`.

14
tests/ui/type-alias-enum-variants/self-in-enum-definition.stderr
View File

@ -46,17 +46,11 @@ LL | V3 = Self::V1 {} as u8 + 2,
| ^^^^^^^^^^^^^^^^^^^^^
= note: ...which requires computing layout of `Alpha`...
= note: ...which again requires simplifying constant for the type system `Alpha::V3::{constant#0}`, completing the cycle
note: cycle used when collecting item types in top-level module
--> $DIR/self-in-enum-definition.rs:1:1
note: cycle used when checking that `Alpha` is well-formed
--> $DIR/self-in-enum-definition.rs:2:1
|
LL | / #[repr(u8)]
LL | | enum Alpha {
LL | | V1 = 41,
LL | | V2 = Self::V1 as u8 + 1, // OK; See #50072.
... |
LL | |
LL | | fn main() {}
| |____________^
LL | enum Alpha {
| ^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error: aborting due to 1 previous error

16
tests/ui/typeck/type-placeholder-fn-in-const.stderr
View File

@ -1,3 +1,9 @@
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/type-placeholder-fn-in-const.rs:10:25
|
LL | const TEST: fn() -> _ = 42;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/type-placeholder-fn-in-const.rs:4:25
|
@ -5,21 +11,15 @@ LL | const TEST: fn() -> _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/type-placeholder-fn-in-const.rs:4:25
|
LL | const TEST: fn() -> _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/type-placeholder-fn-in-const.rs:10:25
|
LL | const TEST: fn() -> _ = 42;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/type-placeholder-fn-in-const.rs:10:25
--> $DIR/type-placeholder-fn-in-const.rs:4:25
|
LL | const TEST: fn() -> _ = 42;
LL | const TEST: fn() -> _;
| ^ not allowed in type signatures
error: aborting due to 4 previous errors

20
tests/ui/typeck/typeck-builtin-bound-type-parameters.stderr
View File

@ -24,6 +24,16 @@ LL | trait Trait: Copy<dyn Send> {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
--> $DIR/typeck-builtin-bound-type-parameters.rs:4:14
|
LL | trait Trait: Copy<dyn Send> {}
| ^^^^---------- help: remove these generics
| |
| expected 0 generic arguments
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
--> $DIR/typeck-builtin-bound-type-parameters.rs:9:21
|
@ -56,16 +66,6 @@ LL | fn foo2<'a, T:Copy<'a, U>, U>(x: T) {}
| |
| expected 0 generic arguments
error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
--> $DIR/typeck-builtin-bound-type-parameters.rs:4:14
|
LL | trait Trait: Copy<dyn Send> {}
| ^^^^---------- help: remove these generics
| |
| expected 0 generic arguments
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: aborting due to 8 previous errors
For more information about this error, try `rustc --explain E0107`.

390
tests/ui/typeck/typeck_type_placeholder_item.stderr
View File

@ -169,6 +169,28 @@ LL | unsafe fn test12(x: *const usize) -> *const *const _ {
| | not allowed in type signatures
| help: replace with the correct return type: `*const *const usize`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:59:24
|
LL | fn clone(&self) -> _ { Test9 }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone(&self) -> Test9 { Test9 }
| ~~~~~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:62:37
|
LL | fn clone_from(&mut self, other: _) { *self = Test9; }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone_from(&mut self, other: &Test9) { *self = Test9; }
| ~~~~~~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:67:8
|
@ -294,6 +316,28 @@ help: use type parameters instead
LL | fn fn_test8<T>(_f: fn() -> T) { }
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:115:28
|
LL | fn clone(&self) -> _ { FnTest9 }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone(&self) -> FnTest9 { FnTest9 }
| ~~~~~~~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:118:41
|
LL | fn clone_from(&mut self, other: _) { *self = FnTest9; }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone_from(&mut self, other: &FnTest9) { *self = FnTest9; }
| ~~~~~~~~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:123:12
|
@ -346,109 +390,6 @@ LL | fn fn_test13(x: _) -> (i32, _) { (x, x) }
| | not allowed in type signatures
| help: replace with the correct return type: `(i32, i32)`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:154:21
|
LL | struct BadStruct<_>(_);
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | struct BadStruct<T>(T);
| ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for implementations
--> $DIR/typeck_type_placeholder_item.rs:159:15
|
LL | impl BadTrait<_> for BadStruct<_> {}
| ^ ^ not allowed in type signatures
| |
| not allowed in type signatures
|
help: use type parameters instead
|
LL | impl<T> BadTrait<T> for BadStruct<T> {}
| +++ ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for opaque types
--> $DIR/typeck_type_placeholder_item.rs:162:34
|
LL | fn impl_trait() -> impl BadTrait<_> {
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:167:25
|
LL | struct BadStruct1<_, _>(_);
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | struct BadStruct1<T, _>(T);
| ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:172:25
|
LL | struct BadStruct2<_, T>(_, T);
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | struct BadStruct2<U, T>(U, T);
| ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for type aliases
--> $DIR/typeck_type_placeholder_item.rs:176:14
|
LL | type X = Box<_>;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for opaque types
--> $DIR/typeck_type_placeholder_item.rs:182:21
|
LL | type Y = impl Trait<_>;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:217:31
|
LL | fn value() -> Option<&'static _> {
| ----------------^-
| | |
| | not allowed in type signatures
| help: replace with the correct return type: `Option<&'static u8>`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for constants
--> $DIR/typeck_type_placeholder_item.rs:222:10
|
LL | const _: Option<_> = map(value);
| ^^^^^^^^^
| |
| not allowed in type signatures
| help: replace with the correct type: `Option<u8>`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:225:31
|
LL | fn evens_squared(n: usize) -> _ {
| ^
| |
| not allowed in type signatures
| help: replace with an appropriate return type: `impl Iterator<Item = usize>`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for constants
--> $DIR/typeck_type_placeholder_item.rs:230:10
|
LL | const _: _ = (1..10).filter(|x| x % 2 == 0).map(|x| x * x);
| ^ not allowed in type signatures
|
note: however, the inferred type `Map<Filter<Range<i32>, {closure@typeck_type_placeholder_item.rs:230:29}>, {closure@typeck_type_placeholder_item.rs:230:49}>` cannot be named
--> $DIR/typeck_type_placeholder_item.rs:230:14
|
LL | const _: _ = (1..10).filter(|x| x % 2 == 0).map(|x| x * x);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:140:31
|
@ -519,41 +460,69 @@ help: use type parameters instead
LL | fn assoc_fn_test3<T>() -> T;
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:190:14
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:154:21
|
LL | type B = _;
LL | struct BadStruct<_>(_);
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | struct BadStruct<T>(T);
| ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for implementations
--> $DIR/typeck_type_placeholder_item.rs:159:15
|
LL | impl BadTrait<_> for BadStruct<_> {}
| ^ ^ not allowed in type signatures
| |
| not allowed in type signatures
|
help: use type parameters instead
|
LL | impl<T> BadTrait<T> for BadStruct<T> {}
| +++ ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for opaque types
--> $DIR/typeck_type_placeholder_item.rs:162:34
|
LL | fn impl_trait() -> impl BadTrait<_> {
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:167:25
|
LL | struct BadStruct1<_, _>(_);
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | struct BadStruct1<T, _>(T);
| ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for structs
--> $DIR/typeck_type_placeholder_item.rs:172:25
|
LL | struct BadStruct2<_, T>(_, T);
| ^ not allowed in type signatures
|
help: use type parameters instead
|
LL | struct BadStruct2<U, T>(U, T);
| ~ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for type aliases
--> $DIR/typeck_type_placeholder_item.rs:176:14
|
LL | type X = Box<_>;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/typeck_type_placeholder_item.rs:192:14
error[E0121]: the placeholder `_` is not allowed within types on item signatures for opaque types
--> $DIR/typeck_type_placeholder_item.rs:182:21
|
LL | const C: _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/typeck_type_placeholder_item.rs:194:14
|
LL | const D: _ = 42;
| ^
| |
| not allowed in type signatures
| help: replace with the correct type: `i32`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:197:26
|
LL | type F: std::ops::Fn(_);
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:41:24
|
LL | fn test9(&self) -> _ { () }
| ^
| |
| not allowed in type signatures
| help: replace with the correct return type: `()`
LL | type Y = impl Trait<_>;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:44:27
@ -566,37 +535,6 @@ help: use type parameters instead
LL | fn test10<T>(&self, _x : T) { }
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:59:24
|
LL | fn clone(&self) -> _ { Test9 }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone(&self) -> Test9 { Test9 }
| ~~~~~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:62:37
|
LL | fn clone_from(&mut self, other: _) { *self = Test9; }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone_from(&mut self, other: &Test9) { *self = Test9; }
| ~~~~~~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:107:31
|
LL | fn fn_test9(&self) -> _ { () }
| ^
| |
| not allowed in type signatures
| help: replace with the correct return type: `()`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:110:34
|
@ -608,39 +546,23 @@ help: use type parameters instead
LL | fn fn_test10<T>(&self, _x : T) { }
| +++ ~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:115:28
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:217:31
|
LL | fn clone(&self) -> _ { FnTest9 }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone(&self) -> FnTest9 { FnTest9 }
| ~~~~~~~
LL | fn value() -> Option<&'static _> {
| ----------------^-
| | |
| | not allowed in type signatures
| help: replace with the correct return type: `Option<&'static u8>`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for functions
--> $DIR/typeck_type_placeholder_item.rs:118:41
error[E0121]: the placeholder `_` is not allowed within types on item signatures for constants
--> $DIR/typeck_type_placeholder_item.rs:222:10
|
LL | fn clone_from(&mut self, other: _) { *self = FnTest9; }
| ^ not allowed in type signatures
|
help: try replacing `_` with the type in the corresponding trait method signature
|
LL | fn clone_from(&mut self, other: &FnTest9) { *self = FnTest9; }
| ~~~~~~~~
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:202:14
|
LL | type A = _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:204:14
|
LL | type B = _;
| ^ not allowed in type signatures
LL | const _: Option<_> = map(value);
| ^^^^^^^^^
| |
| not allowed in type signatures
| help: replace with the correct type: `Option<u8>`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/typeck_type_placeholder_item.rs:206:14
@ -657,6 +579,15 @@ LL | const D: _ = 42;
| not allowed in type signatures
| help: replace with the correct type: `i32`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/typeck_type_placeholder_item.rs:194:14
|
LL | const D: _ = 42;
| ^
| |
| not allowed in type signatures
| help: replace with the correct type: `i32`
error[E0046]: not all trait items implemented, missing: `F`
--> $DIR/typeck_type_placeholder_item.rs:200:1
|
@ -666,6 +597,75 @@ LL | type F: std::ops::Fn(_);
LL | impl Qux for Struct {
| ^^^^^^^^^^^^^^^^^^^ missing `F` in implementation
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:225:31
|
LL | fn evens_squared(n: usize) -> _ {
| ^
| |
| not allowed in type signatures
| help: replace with an appropriate return type: `impl Iterator<Item = usize>`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for constants
--> $DIR/typeck_type_placeholder_item.rs:230:10
|
LL | const _: _ = (1..10).filter(|x| x % 2 == 0).map(|x| x * x);
| ^ not allowed in type signatures
|
note: however, the inferred type `Map<Filter<Range<i32>, {closure@typeck_type_placeholder_item.rs:230:29}>, {closure@typeck_type_placeholder_item.rs:230:49}>` cannot be named
--> $DIR/typeck_type_placeholder_item.rs:230:14
|
LL | const _: _ = (1..10).filter(|x| x % 2 == 0).map(|x| x * x);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:41:24
|
LL | fn test9(&self) -> _ { () }
| ^
| |
| not allowed in type signatures
| help: replace with the correct return type: `()`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/typeck_type_placeholder_item.rs:107:31
|
LL | fn fn_test9(&self) -> _ { () }
| ^
| |
| not allowed in type signatures
| help: replace with the correct return type: `()`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:202:14
|
LL | type A = _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:204:14
|
LL | type B = _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:190:14
|
LL | type B = _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/typeck_type_placeholder_item.rs:192:14
|
LL | const C: _;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated types
--> $DIR/typeck_type_placeholder_item.rs:197:26
|
LL | type F: std::ops::Fn(_);
| ^ not allowed in type signatures
error[E0015]: cannot call non-const fn `<std::ops::Range<i32> as Iterator>::filter::<{closure@$DIR/typeck_type_placeholder_item.rs:230:29: 230:32}>` in constants
--> $DIR/typeck_type_placeholder_item.rs:230:22
|

8
tests/ui/typeck/typeck_type_placeholder_item_help.stderr
View File

@ -38,18 +38,18 @@ LL | const TEST4: fn() -> _ = 42;
| ^ not allowed in type signatures
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/typeck_type_placeholder_item_help.rs:18:18
--> $DIR/typeck_type_placeholder_item_help.rs:25:18
|
LL | const TEST5: _ = 42;
LL | const TEST6: _ = 13;
| ^
| |
| not allowed in type signatures
| help: replace with the correct type: `i32`
error[E0121]: the placeholder `_` is not allowed within types on item signatures for associated constants
--> $DIR/typeck_type_placeholder_item_help.rs:25:18
--> $DIR/typeck_type_placeholder_item_help.rs:18:18
|
LL | const TEST6: _ = 13;
LL | const TEST5: _ = 42;
| ^
| |
| not allowed in type signatures