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Remove OpaqueTyOrigin::Binding

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This commit is contained in:
Santiago Pastorino 2021-07-14 12:31:58 -03:00
parent eb0b95b55a
commit 66c9cd9e66
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GPG key ID: 8131A24E0C79EFAF
33 changed files with 84 additions and 734 deletions
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21
compiler/rustc_ast_lowering/src/lib.rs
View file

@ -264,7 +264,7 @@ enum ImplTraitContext<'b, 'a> {
/// Origin: Either OpaqueTyOrigin::FnReturn or OpaqueTyOrigin::AsyncFn,
origin: hir::OpaqueTyOrigin,
},
/// Impl trait in type aliases, consts and statics.
/// Impl trait in type aliases.
OtherOpaqueTy {
/// Set of lifetimes that this opaque type can capture, if it uses
/// them. This includes lifetimes bound since we entered this context.
@ -1767,21 +1767,10 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
}
fn lower_local(&mut self, l: &Local) -> hir::Local<'hir> {
let ty = l.ty.as_ref().map(|t| {
let mut capturable_lifetimes;
self.lower_ty(
t,
if self.sess.features_untracked().impl_trait_in_bindings {
capturable_lifetimes = FxHashSet::default();
ImplTraitContext::OtherOpaqueTy {
capturable_lifetimes: &mut capturable_lifetimes,
origin: hir::OpaqueTyOrigin::Binding,
}
} else {
ImplTraitContext::Disallowed(ImplTraitPosition::Binding)
},
)
});
let ty = l
.ty
.as_ref()
.map(|t| self.lower_ty(t, ImplTraitContext::Disallowed(ImplTraitPosition::Binding)));
let init = l.init.as_ref().map(|e| self.lower_expr(e));
let hir_id = self.lower_node_id(l.id);
self.lower_attrs(hir_id, &l.attrs);

2
compiler/rustc_hir/src/hir.rs
View file

@ -2270,8 +2270,6 @@ pub enum OpaqueTyOrigin {
FnReturn,
/// `async fn`
AsyncFn,
/// `let _: impl Trait = ...`
Binding,
/// type aliases: `type Foo = impl Trait;`
TyAlias,
/// Impl trait consts, statics, bounds.

4
compiler/rustc_trait_selection/src/opaque_types.rs
View file

@ -402,9 +402,7 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
}
// These opaque type inherit all lifetime parameters from their
// parent, so we have to check them all.
hir::OpaqueTyOrigin::Binding
| hir::OpaqueTyOrigin::TyAlias
| hir::OpaqueTyOrigin::Misc => 0,
hir::OpaqueTyOrigin::TyAlias | hir::OpaqueTyOrigin::Misc => 0,
};
let span = tcx.def_span(def_id);

9
compiler/rustc_typeck/src/check/check.rs
View file

@ -665,13 +665,9 @@ pub(super) fn check_opaque_for_cycles<'tcx>(
span: Span,
origin: &hir::OpaqueTyOrigin,
) -> Result<(), ErrorReported> {
if let Err(partially_expanded_type) = tcx.try_expand_impl_trait_type(def_id.to_def_id(), substs)
{
if tcx.try_expand_impl_trait_type(def_id.to_def_id(), substs).is_err() {
match origin {
hir::OpaqueTyOrigin::AsyncFn => async_opaque_type_cycle_error(tcx, span),
hir::OpaqueTyOrigin::Binding => {
binding_opaque_type_cycle_error(tcx, def_id, span, partially_expanded_type)
}
_ => opaque_type_cycle_error(tcx, def_id, span),
}
Err(ErrorReported)
@ -704,8 +700,7 @@ fn check_opaque_meets_bounds<'tcx>(
// Checked when type checking the function containing them.
hir::OpaqueTyOrigin::FnReturn | hir::OpaqueTyOrigin::AsyncFn => return,
// Can have different predicates to their defining use
hir::OpaqueTyOrigin::Binding | hir::OpaqueTyOrigin::Misc | hir::OpaqueTyOrigin::TyAlias => {
}
hir::OpaqueTyOrigin::Misc | hir::OpaqueTyOrigin::TyAlias => {}
}
let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);

60
compiler/rustc_typeck/src/check/mod.rs
View file

@ -573,66 +573,6 @@ fn get_owner_return_paths(
})
}
/// Emit an error for recursive opaque types in a `let` binding.
fn binding_opaque_type_cycle_error(
tcx: TyCtxt<'tcx>,
def_id: LocalDefId,
span: Span,
partially_expanded_type: Ty<'tcx>,
) {
let mut err = struct_span_err!(tcx.sess, span, E0720, "cannot resolve opaque type");
err.span_label(span, "cannot resolve opaque type");
// Find the owner that declared this `impl Trait` type.
let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
let mut prev_hir_id = hir_id;
let mut hir_id = tcx.hir().get_parent_node(hir_id);
while let Some(node) = tcx.hir().find(hir_id) {
match node {
hir::Node::Local(hir::Local {
pat,
init: None,
ty: Some(ty),
source: hir::LocalSource::Normal,
..
}) => {
err.span_label(pat.span, "this binding might not have a concrete type");
err.span_suggestion_verbose(
ty.span.shrink_to_hi(),
"set the binding to a value for a concrete type to be resolved",
" = /* value */".to_string(),
Applicability::HasPlaceholders,
);
}
hir::Node::Local(hir::Local {
init: Some(expr),
source: hir::LocalSource::Normal,
..
}) => {
let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
let typeck_results =
tcx.typeck(tcx.hir().local_def_id(tcx.hir().get_parent_item(hir_id)));
if let Some(ty) = typeck_results.node_type_opt(expr.hir_id) {
err.span_label(
expr.span,
&format!(
"this is of type `{}`, which doesn't constrain \
`{}` enough to arrive to a concrete type",
ty, partially_expanded_type
),
);
}
}
_ => {}
}
if prev_hir_id == hir_id {
break;
}
prev_hir_id = hir_id;
hir_id = tcx.hir().get_parent_node(hir_id);
}
err.emit();
}
// Forbid defining intrinsics in Rust code,
// as they must always be defined by the compiler.
fn fn_maybe_err(tcx: TyCtxt<'_>, sp: Span, abi: Abi) {

57
compiler/rustc_typeck/src/collect/type_of.rs
View file

@ -356,9 +356,6 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
let substs = InternalSubsts::identity_for_item(tcx, def_id.to_def_id());
tcx.mk_adt(def, substs)
}
ItemKind::OpaqueTy(OpaqueTy { origin: hir::OpaqueTyOrigin::Binding, .. }) => {
let_position_impl_trait_type(tcx, def_id)
}
ItemKind::OpaqueTy(OpaqueTy { impl_trait_fn: None, .. }) => {
find_opaque_ty_constraints(tcx, def_id)
}
@ -696,60 +693,6 @@ fn find_opaque_ty_constraints(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Ty<'_> {
}
}
/// Retrieve the inferred concrete type for let position impl trait.
///
/// This is different to other kinds of impl trait because:
///
/// 1. We know which function contains the defining use (the function that
/// contains the let statement)
/// 2. We do not currently allow (free) lifetimes in the return type. `let`
/// statements in some statically unreachable code are removed from the MIR
/// by the time we borrow check, and it's not clear how we should handle
/// those.
fn let_position_impl_trait_type(tcx: TyCtxt<'_>, opaque_ty_id: LocalDefId) -> Ty<'_> {
let scope = tcx.hir().get_defining_scope(tcx.hir().local_def_id_to_hir_id(opaque_ty_id));
let scope_def_id = tcx.hir().local_def_id(scope);
let opaque_ty_def_id = opaque_ty_id.to_def_id();
let owner_typeck_results = tcx.typeck(scope_def_id);
let concrete_ty = owner_typeck_results
.concrete_opaque_types
.get_by(|(key, _)| key.def_id == opaque_ty_def_id)
.map(|concrete_ty| *concrete_ty)
.unwrap_or_else(|| {
tcx.sess.delay_span_bug(
DUMMY_SP,
&format!(
"owner {:?} has no opaque type for {:?} in its typeck results",
scope_def_id, opaque_ty_id
),
);
if let Some(ErrorReported) = owner_typeck_results.tainted_by_errors {
// Some error in the owner fn prevented us from populating the
// `concrete_opaque_types` table.
tcx.ty_error()
} else {
// We failed to resolve the opaque type or it resolves to
// itself. Return the non-revealed type, which should result in
// E0720.
tcx.mk_opaque(
opaque_ty_def_id,
InternalSubsts::identity_for_item(tcx, opaque_ty_def_id),
)
}
});
debug!("concrete_ty = {:?}", concrete_ty);
if concrete_ty.has_erased_regions() {
// FIXME(impl_trait_in_bindings) Handle this case.
tcx.sess.span_fatal(
tcx.hir().span(tcx.hir().local_def_id_to_hir_id(opaque_ty_id)),
"lifetimes in impl Trait types in bindings are not currently supported",
);
}
concrete_ty
}
fn infer_placeholder_type<'a>(
tcx: TyCtxt<'a>,
def_id: LocalDefId,

92
src/test/ui/associated-type-bounds/duplicate.full_tait.stderr
View file

@ -280,31 +280,7 @@ LL | static SIT3: impl Iterator<Item: 'static, Item: 'static> = iter::empty();
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:86:46
|
LL | fn lit1() { let _: impl Iterator<Item: Copy, Item: Send> = iter::empty(); }
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:88:46
|
LL | fn lit2() { let _: impl Iterator<Item: Copy, Item: Copy> = iter::empty(); }
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:90:49
|
LL | fn lit3() { let _: impl Iterator<Item: 'static, Item: 'static> = iter::empty(); }
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:93:35
--> $DIR/duplicate.rs:86:35
|
LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -312,7 +288,7 @@ LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:95:35
--> $DIR/duplicate.rs:88:35
|
LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -320,7 +296,7 @@ LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:97:38
--> $DIR/duplicate.rs:90:38
|
LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -328,7 +304,7 @@ LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:99:44
--> $DIR/duplicate.rs:92:44
|
LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -336,7 +312,7 @@ LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:101:44
--> $DIR/duplicate.rs:94:44
|
LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -344,7 +320,7 @@ LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:103:47
--> $DIR/duplicate.rs:96:47
|
LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -352,7 +328,7 @@ LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:106:36
--> $DIR/duplicate.rs:99:36
|
LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
| ---------- ^^^^^^^^^^ re-bound here
@ -360,7 +336,7 @@ LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:108:36
--> $DIR/duplicate.rs:101:36
|
LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
| ---------- ^^^^^^^^^^ re-bound here
@ -368,7 +344,7 @@ LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:110:39
--> $DIR/duplicate.rs:103:39
|
LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -376,7 +352,7 @@ LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:112:40
--> $DIR/duplicate.rs:105:40
|
LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
| ---------- ^^^^^^^^^^ re-bound here
@ -384,7 +360,7 @@ LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:114:40
--> $DIR/duplicate.rs:107:40
|
LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
| ---------- ^^^^^^^^^^ re-bound here
@ -392,7 +368,7 @@ LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:116:43
--> $DIR/duplicate.rs:109:43
|
LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -400,7 +376,7 @@ LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:119:36
--> $DIR/duplicate.rs:112:36
|
LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -408,7 +384,7 @@ LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:121:36
--> $DIR/duplicate.rs:114:36
|
LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -416,7 +392,7 @@ LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:123:39
--> $DIR/duplicate.rs:116:39
|
LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -424,7 +400,7 @@ LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:125:34
--> $DIR/duplicate.rs:118:34
|
LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -432,7 +408,7 @@ LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:127:34
--> $DIR/duplicate.rs:120:34
|
LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -440,7 +416,7 @@ LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:129:37
--> $DIR/duplicate.rs:122:37
|
LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -448,7 +424,7 @@ LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:131:45
--> $DIR/duplicate.rs:124:45
|
LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -456,7 +432,7 @@ LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:133:45
--> $DIR/duplicate.rs:126:45
|
LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -464,7 +440,7 @@ LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:135:48
--> $DIR/duplicate.rs:128:48
|
LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -472,7 +448,7 @@ LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:137:46
--> $DIR/duplicate.rs:130:46
|
LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -480,7 +456,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:137:46
--> $DIR/duplicate.rs:130:46
|
LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -488,7 +464,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:140:46
--> $DIR/duplicate.rs:133:46
|
LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -496,7 +472,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:140:46
--> $DIR/duplicate.rs:133:46
|
LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -504,7 +480,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:143:49
--> $DIR/duplicate.rs:136:49
|
LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -512,7 +488,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:143:49
--> $DIR/duplicate.rs:136:49
|
LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -520,7 +496,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:153:40
--> $DIR/duplicate.rs:146:40
|
LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
| ---------- ^^^^^^^^^^ re-bound here
@ -528,7 +504,7 @@ LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:155:44
--> $DIR/duplicate.rs:148:44
|
LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
| ---------- ^^^^^^^^^^ re-bound here
@ -536,7 +512,7 @@ LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:157:43
--> $DIR/duplicate.rs:150:43
|
LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -544,7 +520,7 @@ LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:146:43
--> $DIR/duplicate.rs:139:43
|
LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
| ---------- ^^^^^^^^^^ re-bound here
@ -552,7 +528,7 @@ LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:148:43
--> $DIR/duplicate.rs:141:43
|
LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
| ---------- ^^^^^^^^^^ re-bound here
@ -560,13 +536,13 @@ LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:150:46
--> $DIR/duplicate.rs:143:46
|
LL | trait TRA3 { type A: Iterator<Item: 'static, Item: 'static>; }
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error: aborting due to 69 previous errors; 2 warnings emitted
error: aborting due to 66 previous errors; 2 warnings emitted
For more information about this error, try `rustc --explain E0719`.

92
src/test/ui/associated-type-bounds/duplicate.min_tait.stderr
View file

@ -272,31 +272,7 @@ LL | static SIT3: impl Iterator<Item: 'static, Item: 'static> = iter::empty();
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:86:46
|
LL | fn lit1() { let _: impl Iterator<Item: Copy, Item: Send> = iter::empty(); }
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:88:46
|
LL | fn lit2() { let _: impl Iterator<Item: Copy, Item: Copy> = iter::empty(); }
| ---------- ^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:90:49
|
LL | fn lit3() { let _: impl Iterator<Item: 'static, Item: 'static> = iter::empty(); }
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:93:35
--> $DIR/duplicate.rs:86:35
|
LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -304,7 +280,7 @@ LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:95:35
--> $DIR/duplicate.rs:88:35
|
LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -312,7 +288,7 @@ LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:97:38
--> $DIR/duplicate.rs:90:38
|
LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -320,7 +296,7 @@ LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:99:44
--> $DIR/duplicate.rs:92:44
|
LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -328,7 +304,7 @@ LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:101:44
--> $DIR/duplicate.rs:94:44
|
LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
| ---------- ^^^^^^^^^^ re-bound here
@ -336,7 +312,7 @@ LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:103:47
--> $DIR/duplicate.rs:96:47
|
LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -344,7 +320,7 @@ LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:106:36
--> $DIR/duplicate.rs:99:36
|
LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
| ---------- ^^^^^^^^^^ re-bound here
@ -352,7 +328,7 @@ LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:108:36
--> $DIR/duplicate.rs:101:36
|
LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
| ---------- ^^^^^^^^^^ re-bound here
@ -360,7 +336,7 @@ LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:110:39
--> $DIR/duplicate.rs:103:39
|
LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -368,7 +344,7 @@ LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:112:40
--> $DIR/duplicate.rs:105:40
|
LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
| ---------- ^^^^^^^^^^ re-bound here
@ -376,7 +352,7 @@ LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:114:40
--> $DIR/duplicate.rs:107:40
|
LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
| ---------- ^^^^^^^^^^ re-bound here
@ -384,7 +360,7 @@ LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:116:43
--> $DIR/duplicate.rs:109:43
|
LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -392,7 +368,7 @@ LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:119:36
--> $DIR/duplicate.rs:112:36
|
LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -400,7 +376,7 @@ LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:121:36
--> $DIR/duplicate.rs:114:36
|
LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -408,7 +384,7 @@ LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:123:39
--> $DIR/duplicate.rs:116:39
|
LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -416,7 +392,7 @@ LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:125:34
--> $DIR/duplicate.rs:118:34
|
LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -424,7 +400,7 @@ LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:127:34
--> $DIR/duplicate.rs:120:34
|
LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -432,7 +408,7 @@ LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:129:37
--> $DIR/duplicate.rs:122:37
|
LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -440,7 +416,7 @@ LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:131:45
--> $DIR/duplicate.rs:124:45
|
LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -448,7 +424,7 @@ LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:133:45
--> $DIR/duplicate.rs:126:45
|
LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -456,7 +432,7 @@ LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:135:48
--> $DIR/duplicate.rs:128:48
|
LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -464,7 +440,7 @@ LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:137:46
--> $DIR/duplicate.rs:130:46
|
LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -472,7 +448,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:137:46
--> $DIR/duplicate.rs:130:46
|
LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -480,7 +456,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:140:46
--> $DIR/duplicate.rs:133:46
|
LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -488,7 +464,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:140:46
--> $DIR/duplicate.rs:133:46
|
LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| ---------- ^^^^^^^^^^ re-bound here
@ -496,7 +472,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:143:49
--> $DIR/duplicate.rs:136:49
|
LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -504,7 +480,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:143:49
--> $DIR/duplicate.rs:136:49
|
LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -512,7 +488,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:153:40
--> $DIR/duplicate.rs:146:40
|
LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
| ---------- ^^^^^^^^^^ re-bound here
@ -520,7 +496,7 @@ LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:155:44
--> $DIR/duplicate.rs:148:44
|
LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
| ---------- ^^^^^^^^^^ re-bound here
@ -528,7 +504,7 @@ LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:157:43
--> $DIR/duplicate.rs:150:43
|
LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
| ------------- ^^^^^^^^^^^^^ re-bound here
@ -536,7 +512,7 @@ LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:146:43
--> $DIR/duplicate.rs:139:43
|
LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
| ---------- ^^^^^^^^^^ re-bound here
@ -544,7 +520,7 @@ LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:148:43
--> $DIR/duplicate.rs:141:43
|
LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
| ---------- ^^^^^^^^^^ re-bound here
@ -552,13 +528,13 @@ LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
| `Item` bound here first
error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
--> $DIR/duplicate.rs:150:46
--> $DIR/duplicate.rs:143:46
|
LL | trait TRA3 { type A: Iterator<Item: 'static, Item: 'static>; }
| ------------- ^^^^^^^^^^^^^ re-bound here
| |
| `Item` bound here first
error: aborting due to 69 previous errors; 1 warning emitted
error: aborting due to 66 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0719`.

7
src/test/ui/associated-type-bounds/duplicate.rs
View file

@ -83,13 +83,6 @@ static SIT2: impl Iterator<Item: Copy, Item: Copy> = iter::empty();
static SIT3: impl Iterator<Item: 'static, Item: 'static> = iter::empty();
//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
fn lit1() { let _: impl Iterator<Item: Copy, Item: Send> = iter::empty(); }
//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
fn lit2() { let _: impl Iterator<Item: Copy, Item: Copy> = iter::empty(); }
//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
fn lit3() { let _: impl Iterator<Item: 'static, Item: 'static> = iter::empty(); }
//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;

78
src/test/ui/associated-type-bounds/lcsit.rs
View file

@ -1,78 +0,0 @@
// run-pass
#![feature(associated_type_bounds)]
#![feature(impl_trait_in_bindings)]
//~^ WARNING `impl_trait_in_bindings` is incomplete
#![allow(non_upper_case_globals)]
use std::ops::Add;
trait Tr1 { type As1; fn mk(&self) -> Self::As1; }
trait Tr2<'a> { fn tr2(self) -> &'a Self; }
fn assert_copy<T: Copy>(x: T) { let _x = x; let _x = x; }
fn assert_static<T: 'static>(_: T) {}
fn assert_forall_tr2<T: for<'a> Tr2<'a>>(_: T) {}
#[derive(Copy, Clone)]
struct S1;
#[derive(Copy, Clone)]
struct S2;
impl Tr1 for S1 { type As1 = S2; fn mk(&self) -> Self::As1 { S2 } }
const cdef_et1: impl Copy + Tr1<As1: Copy> = {
let x: impl Copy + Tr1<As1: Copy> = S1;
x
};
static sdef_et1: impl Copy + Tr1<As1: Copy> = cdef_et1;
pub fn use_et1() { assert_copy(cdef_et1.mk()); assert_copy(sdef_et1.mk()); }
const cdef_et2: impl Tr1<As1: 'static> = {
let x: impl Tr1<As1: 'static> = S1;
x
};
static sdef_et2: impl Tr1<As1: 'static> = cdef_et2;
pub fn use_et2() { assert_static(cdef_et2.mk()); assert_static(sdef_et2.mk()); }
const cdef_et3: impl Tr1<As1: Clone + Iterator<Item: Add<u8, Output: Into<u8>>>> = {
struct A;
impl Tr1 for A {
type As1 = core::ops::Range<u8>;
fn mk(&self) -> Self::As1 { 0..10 }
}
let x: impl Tr1<As1: Clone + Iterator<Item: Add<u8, Output: Into<u8>>>> = A;
x
};
pub fn use_et3() {
let _0 = cdef_et3.mk().clone();
let mut s = 0u8;
for _1 in _0 {
let _2 = _1 + 1u8;
s += _2.into();
}
assert_eq!(s, (0..10).map(|x| x + 1).sum());
}
const cdef_et4: impl Copy + Tr1<As1: for<'a> Tr2<'a>> = {
#[derive(Copy, Clone)]
struct A;
impl Tr1 for A {
type As1 = A;
fn mk(&self) -> A { A }
}
impl<'a> Tr2<'a> for A {
fn tr2(self) -> &'a Self { &A }
}
let x: impl Copy + Tr1<As1: for<'a> Tr2<'a>> = A;
x
};
static sdef_et4: impl Copy + Tr1<As1: for<'a> Tr2<'a>> = cdef_et4;
pub fn use_et4() { assert_forall_tr2(cdef_et4.mk()); assert_forall_tr2(sdef_et4.mk()); }
fn main() {
let _ = use_et1();
let _ = use_et2();
let _ = use_et3();
let _ = use_et4();
}

11
src/test/ui/associated-type-bounds/lcsit.stderr
View file

@ -1,11 +0,0 @@
warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/lcsit.rs:4:12
|
LL | #![feature(impl_trait_in_bindings)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(incomplete_features)]` on by default
= note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
warning: 1 warning emitted

11
src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.rs
View file

@ -1,11 +0,0 @@
const FOO: impl Copy = 42;
//~^ ERROR `impl Trait` not allowed
static BAR: impl Copy = 42;
//~^ ERROR `impl Trait` not allowed
fn main() {
let foo = impl Copy = 42;
//~^ ERROR expected expression, found keyword `impl`
let foo: impl Copy = 42;
}

25
src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.stderr
View file

@ -1,25 +0,0 @@
error: expected expression, found keyword `impl`
--> $DIR/feature-gate-impl_trait_in_bindings.rs:8:15
|
LL | let foo = impl Copy = 42;
| ^^^^ expected expression
error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
--> $DIR/feature-gate-impl_trait_in_bindings.rs:1:12
|
LL | const FOO: impl Copy = 42;
| ^^^^^^^^^
|
= help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable
error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
--> $DIR/feature-gate-impl_trait_in_bindings.rs:4:13
|
LL | static BAR: impl Copy = 42;
| ^^^^^^^^^
|
= help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0562`.

9
src/test/ui/impl-trait/binding-without-value.rs
View file

@ -1,9 +0,0 @@
#![allow(incomplete_features)]
#![feature(impl_trait_in_bindings)]
fn foo() {
let _ : impl Copy;
//~^ ERROR cannot resolve opaque type
}
fn main() {}

16
src/test/ui/impl-trait/binding-without-value.stderr
View file

@ -1,16 +0,0 @@
error[E0720]: cannot resolve opaque type
--> $DIR/binding-without-value.rs:5:13
|
LL | let _ : impl Copy;
| - ^^^^^^^^^ cannot resolve opaque type
| |
| this binding might not have a concrete type
|
help: set the binding to a value for a concrete type to be resolved
|
LL | let _ : impl Copy = /* value */;
| ^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0720`.

17
src/test/ui/impl-trait/bindings-opaque.rs
View file

@ -1,17 +0,0 @@
#![feature(impl_trait_in_bindings)]
//~^ WARN the feature `impl_trait_in_bindings` is incomplete
const FOO: impl Copy = 42;
static BAR: impl Copy = 42;
fn main() {
let foo: impl Copy = 42;
let _ = FOO.count_ones();
//~^ ERROR no method
let _ = BAR.count_ones();
//~^ ERROR no method
let _ = foo.count_ones();
//~^ ERROR no method
}

30
src/test/ui/impl-trait/bindings-opaque.stderr
View file

@ -1,30 +0,0 @@
warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/bindings-opaque.rs:1:12
|
LL | #![feature(impl_trait_in_bindings)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(incomplete_features)]` on by default
= note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
error[E0599]: no method named `count_ones` found for opaque type `impl Copy` in the current scope
--> $DIR/bindings-opaque.rs:11:17
|
LL | let _ = FOO.count_ones();
| ^^^^^^^^^^ method not found in `impl Copy`
error[E0599]: no method named `count_ones` found for opaque type `impl Copy` in the current scope
--> $DIR/bindings-opaque.rs:13:17
|
LL | let _ = BAR.count_ones();
| ^^^^^^^^^^ method not found in `impl Copy`
error[E0599]: no method named `count_ones` found for opaque type `impl Copy` in the current scope
--> $DIR/bindings-opaque.rs:15:17
|
LL | let _ = foo.count_ones();
| ^^^^^^^^^^ method not found in `impl Copy`
error: aborting due to 3 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0599`.

34
src/test/ui/impl-trait/bound-normalization-pass.rs
View file

@ -14,7 +14,9 @@
struct Foo<T>(T);
trait FooLike { type Output; }
trait FooLike {
type Output;
}
impl<T> FooLike for Foo<T> {
type Output = T;
@ -28,7 +30,7 @@ mod impl_trait {
}
/// `T::Assoc` should be normalized to `()` here.
fn foo_pass<T: Trait<Assoc=()>>() -> impl FooLike<Output=T::Assoc> {
fn foo_pass<T: Trait<Assoc = ()>>() -> impl FooLike<Output = T::Assoc> {
Foo(())
}
}
@ -45,40 +47,20 @@ mod lifetimes {
/// Like above.
///
/// FIXME(#51525) -- the shorter notation `T::Assoc` winds up referencing `'static` here
fn foo2_pass<'a, T: Trait<'a, Assoc=()> + 'a>(
) -> impl FooLike<Output=<T as Trait<'a>>::Assoc> + 'a {
fn foo2_pass<'a, T: Trait<'a, Assoc = ()> + 'a>()
-> impl FooLike<Output = <T as Trait<'a>>::Assoc> + 'a {
Foo(())
}
/// Normalization to type containing bound region.
///
/// FIXME(#51525) -- the shorter notation `T::Assoc` winds up referencing `'static` here
fn foo2_pass2<'a, T: Trait<'a, Assoc=&'a ()> + 'a>(
) -> impl FooLike<Output=<T as Trait<'a>>::Assoc> + 'a {
fn foo2_pass2<'a, T: Trait<'a, Assoc = &'a ()> + 'a>()
-> impl FooLike<Output = <T as Trait<'a>>::Assoc> + 'a {
Foo(&())
}
}
// Reduction using `impl Trait` in bindings
mod impl_trait_in_bindings {
struct Foo;
trait FooLike { type Output; }
impl FooLike for Foo {
type Output = u32;
}
trait Trait {
type Assoc;
}
fn foo<T: Trait<Assoc=u32>>() {
let _: impl FooLike<Output=T::Assoc> = Foo;
}
}
// The same applied to `type Foo = impl Bar`s
mod opaque_types {

8
src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.rs
View file

@ -1,8 +0,0 @@
// check-pass
#![feature(impl_trait_in_bindings)]
//~^ WARN the feature `impl_trait_in_bindings` is incomplete
const _: impl Fn() = ||();
fn main() {}

11
src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.stderr
View file

@ -1,11 +0,0 @@
warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/impl-trait-in-bindings-issue-73003.rs:3:12
|
LL | #![feature(impl_trait_in_bindings)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(incomplete_features)]` on by default
= note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
warning: 1 warning emitted

49
src/test/ui/impl-trait/impl-trait-in-bindings.rs
View file

@ -1,49 +0,0 @@
// run-pass
#![feature(impl_trait_in_bindings)]
//~^ WARN the feature `impl_trait_in_bindings` is incomplete
use std::fmt::Debug;
const FOO: impl Debug + Clone + PartialEq<i32> = 42;
static BAR: impl Debug + Clone + PartialEq<i32> = 42;
fn a<T: Clone>(x: T) {
let y: impl Clone = x;
let _ = y.clone();
}
fn b<T: Clone>(x: T) {
let f = move || {
let y: impl Clone = x;
let _ = y.clone();
};
f();
}
trait Foo<T: Clone> {
fn a(x: T) {
let y: impl Clone = x;
let _ = y.clone();
}
}
impl<T: Clone> Foo<T> for i32 {
fn a(x: T) {
let y: impl Clone = x;
let _ = y.clone();
}
}
fn main() {
let foo: impl Debug + Clone + PartialEq<i32> = 42;
assert_eq!(FOO.clone(), 42);
assert_eq!(BAR.clone(), 42);
assert_eq!(foo.clone(), 42);
a(42);
b(42);
i32::a(42);
}

11
src/test/ui/impl-trait/impl-trait-in-bindings.stderr
View file

@ -1,11 +0,0 @@
warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/impl-trait-in-bindings.rs:3:12
|
LL | #![feature(impl_trait_in_bindings)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(incomplete_features)]` on by default
= note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
warning: 1 warning emitted

15
src/test/ui/impl-trait/issue-57200.rs
View file

@ -1,15 +0,0 @@
// Regression test for #57200
// FIXME: The error is temporary hack, we'll revisit here at some point.
#![feature(impl_trait_in_bindings)]
#![allow(incomplete_features)]
fn bug<'a, 'b, T>()
where
'a: 'b,
{
let f: impl Fn(&'a T) -> &'b T = |x| x;
//~^ ERROR: lifetimes in impl Trait types in bindings are not currently supported
}
fn main() {}

8
src/test/ui/impl-trait/issue-57200.stderr
View file

@ -1,8 +0,0 @@
error: lifetimes in impl Trait types in bindings are not currently supported
--> $DIR/issue-57200.rs:11:12
|
LL | let f: impl Fn(&'a T) -> &'b T = |x| x;
| ^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to previous error

15
src/test/ui/impl-trait/issue-57201.rs
View file

@ -1,15 +0,0 @@
// Regression test for #57201
// FIXME: The error is temporary hack, we'll revisit here at some point.
#![feature(impl_trait_in_bindings)]
#![allow(incomplete_features)]
fn bug<'a, 'b, T>()
where
'a: 'b,
{
let f: &impl Fn(&'a T) -> &'b T = &|x| x;
//~^ ERROR: lifetimes in impl Trait types in bindings are not currently supported
}
fn main() {}

8
src/test/ui/impl-trait/issue-57201.stderr
View file

@ -1,8 +0,0 @@
error: lifetimes in impl Trait types in bindings are not currently supported
--> $DIR/issue-57201.rs:11:13
|
LL | let f: &impl Fn(&'a T) -> &'b T = &|x| x;
| ^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to previous error

15
src/test/ui/impl-trait/issue-60473.rs
View file

@ -1,15 +0,0 @@
// Regression test for #60473
#![feature(impl_trait_in_bindings)]
#![allow(incomplete_features)]
struct A<'a>(&'a ());
trait Trait<T> {}
impl<T> Trait<T> for () {}
fn main() {
let x: impl Trait<A> = ();
//~^ ERROR: missing lifetime specifier
}

15
src/test/ui/impl-trait/issue-60473.stderr
View file

@ -1,15 +0,0 @@
error[E0106]: missing lifetime specifier
--> $DIR/issue-60473.rs:13:23
|
LL | let x: impl Trait<A> = ();
| ^ expected named lifetime parameter
|
help: consider introducing a named lifetime parameter
|
LL | fn main<'a>() {
LL | let x: impl Trait<A<'a>> = ();
|
error: aborting due to previous error
For more information about this error, try `rustc --explain E0106`.

11
src/test/ui/impl-trait/issue-67166.rs
View file

@ -1,11 +0,0 @@
// Regression test for #67166
#![feature(impl_trait_in_bindings)]
#![allow(incomplete_features)]
pub fn run() {
let _foo: Box<impl Copy + '_> = Box::new(());
//~^ ERROR: missing lifetime specifier
}
fn main() {}

15
src/test/ui/impl-trait/issue-67166.stderr
View file

@ -1,15 +0,0 @@
error[E0106]: missing lifetime specifier
--> $DIR/issue-67166.rs:7:31
|
LL | let _foo: Box<impl Copy + '_> = Box::new(());
| ^^ expected named lifetime parameter
|
help: consider introducing a named lifetime parameter
|
LL | pub fn run<'a>() {
LL | let _foo: Box<impl Copy + 'a> = Box::new(());
|
error: aborting due to previous error
For more information about this error, try `rustc --explain E0106`.

16
src/test/ui/impl-trait/issue-69840.rs
View file

@ -1,16 +0,0 @@
// check-pass
#![feature(impl_trait_in_bindings)]
#![allow(incomplete_features)]
struct A<'a>(&'a ());
trait Trait<T> {}
impl<T> Trait<T> for () {}
pub fn foo<'a>() {
let _x: impl Trait<A<'a>> = ();
}
fn main() {}

15
src/test/ui/impl-trait/issues/issue-78721.rs
View file

@ -1,15 +0,0 @@
// edition:2018
#![feature(impl_trait_in_bindings)]
//~^ WARN the feature `impl_trait_in_bindings` is incomplete
struct Bug {
V1: [(); {
let f: impl core::future::Future<Output = u8> = async { 1 };
//~^ ERROR `async` blocks are not allowed in constants
//~| ERROR destructors cannot be evaluated at compile-time
1
}],
}
fn main() {}

31
src/test/ui/impl-trait/issues/issue-78721.stderr
View file

@ -1,31 +0,0 @@
warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
--> $DIR/issue-78721.rs:3:12
|
LL | #![feature(impl_trait_in_bindings)]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(incomplete_features)]` on by default
= note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
error[E0658]: `async` blocks are not allowed in constants
--> $DIR/issue-78721.rs:8:57
|
LL | let f: impl core::future::Future<Output = u8> = async { 1 };
| ^^^^^^^^^^^
|
= note: see issue #85368 <https://github.com/rust-lang/rust/issues/85368> for more information
= help: add `#![feature(const_async_blocks)]` to the crate attributes to enable
error[E0493]: destructors cannot be evaluated at compile-time
--> $DIR/issue-78721.rs:8:13
|
LL | let f: impl core::future::Future<Output = u8> = async { 1 };
| ^ constants cannot evaluate destructors
...
LL | }],
| - value is dropped here
error: aborting due to 2 previous errors; 1 warning emitted
Some errors have detailed explanations: E0493, E0658.
For more information about an error, try `rustc --explain E0493`.