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Fold item bound before checking that they hold
This commit is contained in:
Michael Goulet
parent
7feb191f18
commit
2f4b7dc047
@ -2026,10 +2026,19 @@ pub(super) fn check_type_bounds<'tcx>(
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// to its definition type. This should be the param-env we use to *prove* the
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// predicate too, but we don't do that because of performance issues.
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// See <https://github.com/rust-lang/rust/pull/117542#issue-1976337685>.
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let trait_projection_ty = Ty::new_projection(tcx, trait_ty.def_id, rebased_args);
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let impl_identity_ty = tcx.type_of(impl_ty.def_id).instantiate_identity();
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let normalize_param_env = param_env_with_gat_bounds(tcx, impl_ty, impl_trait_ref);
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for mut obligation in util::elaborate(tcx, obligations) {
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let normalized_predicate =
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ocx.normalize(&normalize_cause, normalize_param_env, obligation.predicate);
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let normalized_predicate = if infcx.next_trait_solver() {
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obligation.predicate.fold_with(&mut ReplaceTy {
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tcx,
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from: trait_projection_ty,
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to: impl_identity_ty,
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})
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} else {
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ocx.normalize(&normalize_cause, normalize_param_env, obligation.predicate)
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};
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debug!("compare_projection_bounds: normalized predicate = {:?}", normalized_predicate);
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obligation.predicate = normalized_predicate;
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@ -2050,6 +2059,22 @@ pub(super) fn check_type_bounds<'tcx>(
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ocx.resolve_regions_and_report_errors(impl_ty_def_id, &outlives_env)
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}
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struct ReplaceTy<'tcx> {
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tcx: TyCtxt<'tcx>,
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from: Ty<'tcx>,
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to: Ty<'tcx>,
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}
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impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReplaceTy<'tcx> {
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fn interner(&self) -> TyCtxt<'tcx> {
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self.tcx
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}
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fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
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if self.from == ty { self.to } else { ty.super_fold_with(self) }
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}
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}
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/// Install projection predicates that allow GATs to project to their own
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/// definition types. This is not allowed in general in cases of default
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/// associated types in trait definitions, or when specialization is involved,
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@ -1,12 +1,12 @@
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error[E0277]: `Self` doesn't implement `std::fmt::Display`
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--> $DIR/defaults-unsound-62211-1.rs:26:96
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ `Self` cannot be formatted with the default formatter
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|
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= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:26:86
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--> $DIR/defaults-unsound-62211-1.rs:24:86
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^ required by this bound in `UncheckedCopy::Output`
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@ -16,13 +16,13 @@ LL | trait UncheckedCopy: Sized + std::fmt::Display {
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| +++++++++++++++++++
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error[E0277]: cannot add-assign `&'static str` to `Self`
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--> $DIR/defaults-unsound-62211-1.rs:26:96
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ no implementation for `Self += &'static str`
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|
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:26:47
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--> $DIR/defaults-unsound-62211-1.rs:24:47
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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@ -32,13 +32,13 @@ LL | trait UncheckedCopy: Sized + AddAssign<&'static str> {
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| +++++++++++++++++++++++++
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error[E0277]: the trait bound `Self: Deref` is not satisfied
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--> $DIR/defaults-unsound-62211-1.rs:26:96
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ the trait `Deref` is not implemented for `Self`
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:26:25
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--> $DIR/defaults-unsound-62211-1.rs:24:25
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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@ -48,13 +48,13 @@ LL | trait UncheckedCopy: Sized + Deref {
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| +++++++
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error[E0277]: the trait bound `Self: Copy` is not satisfied
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--> $DIR/defaults-unsound-62211-1.rs:26:96
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ the trait `Copy` is not implemented for `Self`
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:26:18
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--> $DIR/defaults-unsound-62211-1.rs:24:18
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ required by this bound in `UncheckedCopy::Output`
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@ -1,17 +1,81 @@
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warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
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--> $DIR/defaults-unsound-62211-1.rs:52:5
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error[E0277]: `Self` doesn't implement `std::fmt::Display`
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | drop(origin);
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| ^^^^^------^
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| |
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| argument has type `<T as UncheckedCopy>::Output`
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ `Self` cannot be formatted with the default formatter
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= note: `#[warn(dropping_copy_types)]` on by default
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help: use `let _ = ...` to ignore the expression or result
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= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:24:86
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LL - drop(origin);
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LL + let _ = origin;
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^ required by this bound in `UncheckedCopy::Output`
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help: consider further restricting `Self`
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LL | trait UncheckedCopy: Sized + std::fmt::Display {
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| +++++++++++++++++++
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warning: 1 warning emitted
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error[E0277]: cannot add-assign `&'static str` to `Self`
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ no implementation for `Self += &'static str`
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:24:47
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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help: consider further restricting `Self`
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LL | trait UncheckedCopy: Sized + AddAssign<&'static str> {
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| +++++++++++++++++++++++++
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error[E0271]: type mismatch resolving `<Self as Deref>::Target == str`
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ types differ
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:24:31
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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error[E0277]: the trait bound `Self: Deref` is not satisfied
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ the trait `Deref` is not implemented for `Self`
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:24:25
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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help: consider further restricting `Self`
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LL | trait UncheckedCopy: Sized + Deref {
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| +++++++
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error[E0277]: the trait bound `Self: Copy` is not satisfied
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--> $DIR/defaults-unsound-62211-1.rs:24:96
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ the trait `Copy` is not implemented for `Self`
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-1.rs:24:18
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ required by this bound in `UncheckedCopy::Output`
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help: consider further restricting `Self`
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LL | trait UncheckedCopy: Sized + Copy {
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| ++++++
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0271, E0277.
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For more information about an error, try `rustc --explain E0271`.
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@ -1,8 +1,6 @@
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//@ revisions: current next
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//@[next] compile-flags: -Znext-solver
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//@ ignore-compare-mode-next-solver (explicit revisions)
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//@[next] known-bug: rust-lang/trait-system-refactor-initiative#46
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//@[next] check-pass
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//! Regression test for https://github.com/rust-lang/rust/issues/62211
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//!
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@ -24,10 +22,11 @@ trait UncheckedCopy: Sized {
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// This Output is said to be Copy. Yet we default to Self
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// and it's accepted, not knowing if Self ineed is Copy
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type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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//[current]~^ ERROR the trait bound `Self: Copy` is not satisfied
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//[current]~| ERROR the trait bound `Self: Deref` is not satisfied
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//[current]~| ERROR cannot add-assign `&'static str` to `Self`
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//[current]~| ERROR `Self` doesn't implement `std::fmt::Display`
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//~^ ERROR the trait bound `Self: Copy` is not satisfied
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//~| ERROR the trait bound `Self: Deref` is not satisfied
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//~| ERROR cannot add-assign `&'static str` to `Self`
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//~| ERROR `Self` doesn't implement `std::fmt::Display`
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//[next]~| ERROR type mismatch resolving `<Self as Deref>::Target == str`
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// We said the Output type was Copy, so we can Copy it freely!
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fn unchecked_copy(other: &Self::Output) -> Self::Output {
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@ -1,12 +1,12 @@
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error[E0277]: `Self` doesn't implement `std::fmt::Display`
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--> $DIR/defaults-unsound-62211-2.rs:26:96
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ `Self` cannot be formatted with the default formatter
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|
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= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:26:86
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--> $DIR/defaults-unsound-62211-2.rs:24:86
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^ required by this bound in `UncheckedCopy::Output`
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@ -16,13 +16,13 @@ LL | trait UncheckedCopy: Sized + std::fmt::Display {
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| +++++++++++++++++++
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error[E0277]: cannot add-assign `&'static str` to `Self`
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--> $DIR/defaults-unsound-62211-2.rs:26:96
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ no implementation for `Self += &'static str`
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|
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:26:47
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--> $DIR/defaults-unsound-62211-2.rs:24:47
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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@ -32,13 +32,13 @@ LL | trait UncheckedCopy: Sized + AddAssign<&'static str> {
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| +++++++++++++++++++++++++
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error[E0277]: the trait bound `Self: Deref` is not satisfied
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--> $DIR/defaults-unsound-62211-2.rs:26:96
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ the trait `Deref` is not implemented for `Self`
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|
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:26:25
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--> $DIR/defaults-unsound-62211-2.rs:24:25
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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@ -48,13 +48,13 @@ LL | trait UncheckedCopy: Sized + Deref {
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| +++++++
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error[E0277]: the trait bound `Self: Copy` is not satisfied
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--> $DIR/defaults-unsound-62211-2.rs:26:96
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ the trait `Copy` is not implemented for `Self`
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|
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:26:18
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--> $DIR/defaults-unsound-62211-2.rs:24:18
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ required by this bound in `UncheckedCopy::Output`
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@ -1,17 +1,81 @@
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warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
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--> $DIR/defaults-unsound-62211-2.rs:52:5
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error[E0277]: `Self` doesn't implement `std::fmt::Display`
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | drop(origin);
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| ^^^^^------^
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| |
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| argument has type `<T as UncheckedCopy>::Output`
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ `Self` cannot be formatted with the default formatter
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|
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= note: `#[warn(dropping_copy_types)]` on by default
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help: use `let _ = ...` to ignore the expression or result
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= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:24:86
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|
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LL - drop(origin);
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LL + let _ = origin;
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^ required by this bound in `UncheckedCopy::Output`
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help: consider further restricting `Self`
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|
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LL | trait UncheckedCopy: Sized + std::fmt::Display {
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| +++++++++++++++++++
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warning: 1 warning emitted
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error[E0277]: cannot add-assign `&'static str` to `Self`
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ no implementation for `Self += &'static str`
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|
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:24:47
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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help: consider further restricting `Self`
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|
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LL | trait UncheckedCopy: Sized + AddAssign<&'static str> {
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| +++++++++++++++++++++++++
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error[E0271]: type mismatch resolving `<Self as Deref>::Target == str`
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ types differ
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|
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:24:31
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
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error[E0277]: the trait bound `Self: Deref` is not satisfied
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--> $DIR/defaults-unsound-62211-2.rs:24:96
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|
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LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
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| ^^^^ the trait `Deref` is not implemented for `Self`
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|
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note: required by a bound in `UncheckedCopy::Output`
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--> $DIR/defaults-unsound-62211-2.rs:24:25
|
||||
|
|
||||
LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
|
||||
| ^^^^^^^^^^^^^^^^^^^ required by this bound in `UncheckedCopy::Output`
|
||||
help: consider further restricting `Self`
|
||||
|
|
||||
LL | trait UncheckedCopy: Sized + Deref {
|
||||
| +++++++
|
||||
|
||||
error[E0277]: the trait bound `Self: Copy` is not satisfied
|
||||
--> $DIR/defaults-unsound-62211-2.rs:24:96
|
||||
|
|
||||
LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
|
||||
| ^^^^ the trait `Copy` is not implemented for `Self`
|
||||
|
|
||||
note: required by a bound in `UncheckedCopy::Output`
|
||||
--> $DIR/defaults-unsound-62211-2.rs:24:18
|
||||
|
|
||||
LL | type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
|
||||
| ^^^^ required by this bound in `UncheckedCopy::Output`
|
||||
help: consider further restricting `Self`
|
||||
|
|
||||
LL | trait UncheckedCopy: Sized + Copy {
|
||||
| ++++++
|
||||
|
||||
error: aborting due to 5 previous errors
|
||||
|
||||
Some errors have detailed explanations: E0271, E0277.
|
||||
For more information about an error, try `rustc --explain E0271`.
|
||||
|
||||
@ -1,8 +1,6 @@
|
||||
//@ revisions: current next
|
||||
//@[next] compile-flags: -Znext-solver
|
||||
//@ ignore-compare-mode-next-solver (explicit revisions)
|
||||
//@[next] known-bug: rust-lang/trait-system-refactor-initiative#46
|
||||
//@[next] check-pass
|
||||
|
||||
//! Regression test for https://github.com/rust-lang/rust/issues/62211
|
||||
//!
|
||||
@ -24,10 +22,11 @@ trait UncheckedCopy: Sized {
|
||||
// This Output is said to be Copy. Yet we default to Self
|
||||
// and it's accepted, not knowing if Self ineed is Copy
|
||||
type Output: Copy + Deref<Target = str> + AddAssign<&'static str> + From<Self> + Display = Self;
|
||||
//[current]~^ ERROR the trait bound `Self: Copy` is not satisfied
|
||||
//[current]~| ERROR the trait bound `Self: Deref` is not satisfied
|
||||
//[current]~| ERROR cannot add-assign `&'static str` to `Self`
|
||||
//[current]~| ERROR `Self` doesn't implement `std::fmt::Display`
|
||||
//~^ ERROR the trait bound `Self: Copy` is not satisfied
|
||||
//~| ERROR the trait bound `Self: Deref` is not satisfied
|
||||
//~| ERROR cannot add-assign `&'static str` to `Self`
|
||||
//~| ERROR `Self` doesn't implement `std::fmt::Display`
|
||||
//[next]~| ERROR type mismatch resolving `<Self as Deref>::Target == str`
|
||||
|
||||
// We said the Output type was Copy, so we can Copy it freely!
|
||||
fn unchecked_copy(other: &Self::Output) -> Self::Output {
|
||||
|
||||
@ -1,16 +1,16 @@
|
||||
error[E0277]: the trait bound `<Self as Foo>::Bar<()>: Eq<i32>` is not satisfied
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:10:30
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:9:30
|
||||
|
|
||||
LL | type Bar<T>: Baz<Self> = i32;
|
||||
| ^^^ the trait `Eq<i32>` is not implemented for `<Self as Foo>::Bar<()>`, which is required by `i32: Baz<Self>`
|
||||
|
|
||||
note: required for `i32` to implement `Baz<Self>`
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:17:23
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:16:23
|
||||
|
|
||||
LL | impl<T: Foo + ?Sized> Baz<T> for i32 where T::Bar<()>: Eq<i32> {}
|
||||
| ^^^^^^ ^^^ ------- unsatisfied trait bound introduced here
|
||||
note: required by a bound in `Foo::Bar`
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:10:18
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:9:18
|
||||
|
|
||||
LL | type Bar<T>: Baz<Self> = i32;
|
||||
| ^^^^^^^^^ required by this bound in `Foo::Bar`
|
||||
|
||||
@ -0,0 +1,24 @@
|
||||
error[E0277]: the trait bound `i32: Baz<Self>` is not satisfied
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:9:30
|
||||
|
|
||||
LL | type Bar<T>: Baz<Self> = i32;
|
||||
| ^^^ the trait `Eq<i32>` is not implemented for `i32`, which is required by `i32: Baz<Self>`
|
||||
|
|
||||
note: required for `i32` to implement `Baz<Self>`
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:16:23
|
||||
|
|
||||
LL | impl<T: Foo + ?Sized> Baz<T> for i32 where T::Bar<()>: Eq<i32> {}
|
||||
| ^^^^^^ ^^^ ------- unsatisfied trait bound introduced here
|
||||
note: required by a bound in `Foo::Bar`
|
||||
--> $DIR/assume-gat-normalization-for-nested-goals.rs:9:18
|
||||
|
|
||||
LL | type Bar<T>: Baz<Self> = i32;
|
||||
| ^^^^^^^^^ required by this bound in `Foo::Bar`
|
||||
help: consider further restricting the associated type
|
||||
|
|
||||
LL | trait Foo where <Self as Foo>::Bar<()>: Eq<i32> {
|
||||
| +++++++++++++++++++++++++++++++++++++
|
||||
|
||||
error: aborting due to 1 previous error
|
||||
|
||||
For more information about this error, try `rustc --explain E0277`.
|
||||
@ -1,8 +1,7 @@
|
||||
//@ revisions: current next
|
||||
//@[next] compile-flags: -Znext-solver
|
||||
//@ ignore-compare-mode-next-solver (explicit revisions)
|
||||
//@[current] known-bug: #117606
|
||||
//@[next] check-pass
|
||||
//@ known-bug: #117606
|
||||
|
||||
#![feature(associated_type_defaults)]
|
||||
|
||||
|
||||
@ -7,13 +7,6 @@ LL | impl Overlap for u32 {
|
||||
LL | impl Overlap for <u32 as Default>::Id {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `u32`
|
||||
|
||||
error[E0282]: type annotations needed
|
||||
--> $DIR/specialization-default-items-drop-coherence.rs:18:23
|
||||
|
|
||||
LL | default type Id = T;
|
||||
| ^ cannot infer type for associated type `<T as Default>::Id`
|
||||
error: aborting due to 1 previous error
|
||||
|
||||
error: aborting due to 2 previous errors
|
||||
|
||||
Some errors have detailed explanations: E0119, E0282.
|
||||
For more information about an error, try `rustc --explain E0119`.
|
||||
For more information about this error, try `rustc --explain E0119`.
|
||||
|
||||
@ -15,7 +15,7 @@ trait Default {
|
||||
}
|
||||
|
||||
impl<T> Default for T {
|
||||
default type Id = T; //[next]~ ERROR type annotations needed
|
||||
default type Id = T;
|
||||
}
|
||||
|
||||
trait Overlap {
|
||||
|
||||
@ -9,7 +9,7 @@ LL | #![feature(specialization)]
|
||||
= note: `#[warn(incomplete_features)]` on by default
|
||||
|
||||
error[E0119]: conflicting implementations of trait `Foo` for type `u32`
|
||||
--> $DIR/specialization-overlap-projection.rs:28:1
|
||||
--> $DIR/specialization-overlap-projection.rs:25:1
|
||||
|
|
||||
LL | impl Foo for u32 {}
|
||||
| ---------------- first implementation here
|
||||
@ -17,7 +17,7 @@ LL | impl Foo for <u8 as Assoc>::Output {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `u32`
|
||||
|
||||
error[E0119]: conflicting implementations of trait `Foo` for type `u32`
|
||||
--> $DIR/specialization-overlap-projection.rs:30:1
|
||||
--> $DIR/specialization-overlap-projection.rs:27:1
|
||||
|
|
||||
LL | impl Foo for u32 {}
|
||||
| ---------------- first implementation here
|
||||
@ -25,25 +25,6 @@ LL | impl Foo for u32 {}
|
||||
LL | impl Foo for <u16 as Assoc>::Output {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `u32`
|
||||
|
||||
error[E0282]: type annotations needed
|
||||
--> $DIR/specialization-overlap-projection.rs:17:27
|
||||
|
|
||||
LL | default type Output = bool;
|
||||
| ^^^^ cannot infer type for associated type `<T as Assoc>::Output`
|
||||
error: aborting due to 2 previous errors; 1 warning emitted
|
||||
|
||||
error[E0282]: type annotations needed
|
||||
--> $DIR/specialization-overlap-projection.rs:21:35
|
||||
|
|
||||
LL | impl Assoc for u8 { type Output = u8; }
|
||||
| ^^ cannot infer type for associated type `<u8 as Assoc>::Output`
|
||||
|
||||
error[E0282]: type annotations needed
|
||||
--> $DIR/specialization-overlap-projection.rs:23:36
|
||||
|
|
||||
LL | impl Assoc for u16 { type Output = u16; }
|
||||
| ^^^ cannot infer type for associated type `<u16 as Assoc>::Output`
|
||||
|
||||
error: aborting due to 5 previous errors; 1 warning emitted
|
||||
|
||||
Some errors have detailed explanations: E0119, E0282.
|
||||
For more information about an error, try `rustc --explain E0119`.
|
||||
For more information about this error, try `rustc --explain E0119`.
|
||||
|
||||
@ -15,13 +15,10 @@ trait Assoc {
|
||||
|
||||
impl<T> Assoc for T {
|
||||
default type Output = bool;
|
||||
//[next]~^ ERROR type annotations needed
|
||||
}
|
||||
|
||||
impl Assoc for u8 { type Output = u8; }
|
||||
//[next]~^ ERROR type annotations needed
|
||||
impl Assoc for u16 { type Output = u16; }
|
||||
//[next]~^ ERROR type annotations needed
|
||||
|
||||
trait Foo {}
|
||||
impl Foo for u32 {}
|
||||
|
||||
@ -10,7 +10,7 @@ trait Default {
|
||||
}
|
||||
|
||||
impl<T> Default for T {
|
||||
default type Id = T; //~ ERROR type annotations needed
|
||||
default type Id = T;
|
||||
// This will be fixed by #111994
|
||||
fn intu(&self) -> &Self::Id {
|
||||
//~^ ERROR type annotations needed
|
||||
|
||||
@ -34,13 +34,6 @@ note: required by a bound in `transmute`
|
||||
LL | fn transmute<T: Default<Id = U>, U: Copy>(t: T) -> U {
|
||||
| ^^^^^^ required by this bound in `transmute`
|
||||
|
||||
error[E0282]: type annotations needed
|
||||
--> $DIR/specialization-transmute.rs:13:23
|
||||
|
|
||||
LL | default type Id = T;
|
||||
| ^ cannot infer type for associated type `<T as Default>::Id`
|
||||
error: aborting due to 4 previous errors; 1 warning emitted
|
||||
|
||||
error: aborting due to 5 previous errors; 1 warning emitted
|
||||
|
||||
Some errors have detailed explanations: E0282, E0284.
|
||||
For more information about an error, try `rustc --explain E0282`.
|
||||
For more information about this error, try `rustc --explain E0284`.
|
||||
|
||||
@ -11,7 +11,7 @@ trait Default {
|
||||
}
|
||||
|
||||
impl<T> Default for T {
|
||||
default type Id = T; //~ ERROR type annotations needed
|
||||
default type Id = T;
|
||||
}
|
||||
|
||||
fn test<T: Default<Id = U>, U>() {}
|
||||
|
||||
@ -20,13 +20,6 @@ note: required by a bound in `test`
|
||||
LL | fn test<T: Default<Id = U>, U>() {}
|
||||
| ^^^^^^ required by this bound in `test`
|
||||
|
||||
error[E0282]: type annotations needed
|
||||
--> $DIR/specialization-unconstrained.rs:14:22
|
||||
|
|
||||
LL | default type Id = T;
|
||||
| ^ cannot infer type for associated type `<T as Default>::Id`
|
||||
error: aborting due to 1 previous error; 1 warning emitted
|
||||
|
||||
error: aborting due to 2 previous errors; 1 warning emitted
|
||||
|
||||
Some errors have detailed explanations: E0282, E0284.
|
||||
For more information about an error, try `rustc --explain E0282`.
|
||||
For more information about this error, try `rustc --explain E0284`.
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
//~ ERROR the type `<() as StaticTy>::Item<'a>` does not fulfill the required lifetime
|
||||
//~ ERROR the type `&'a ()` does not fulfill the required lifetime
|
||||
//@ compile-flags: -Znext-solver
|
||||
// Regression test for rust-lang/trait-system-refactor-initiative#59
|
||||
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
error[E0477]: the type `<() as StaticTy>::Item<'a>` does not fulfill the required lifetime
|
||||
error[E0477]: the type `&'a ()` does not fulfill the required lifetime
|
||||
|
|
||||
= note: type must satisfy the static lifetime
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user