Auto merge of rust-lang#86603 - Mark-Simulacrum:stage-step, r=pietroalbini

Update to new bootstrap compiler

r? `@pietroalbini`

Author: bors

compiler/rustc_ast/src/lib.rs

@@ -10,7 +10,6 @@
 )]
 #![feature(box_syntax)]
 #![feature(box_patterns)]
-#![cfg_attr(bootstrap, feature(const_fn_unsize))]
 #![feature(const_fn_transmute)]
 #![feature(crate_visibility_modifier)]
 #![feature(iter_zip)]

compiler/rustc_codegen_llvm/src/lib.rs

@@ -8,7 +8,6 @@
 #![feature(bool_to_option)]
 #![feature(const_cstr_unchecked)]
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(extended_key_value_attributes))]
 #![feature(extern_types)]
 #![feature(in_band_lifetimes)]
 #![feature(iter_zip)]

compiler/rustc_errors/src/lib.rs

@@ -5,7 +5,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(crate_visibility_modifier)]
 #![feature(backtrace)]
-#![cfg_attr(bootstrap, feature(extended_key_value_attributes))]
 #![feature(format_args_capture)]
 #![feature(iter_zip)]
 #![feature(nll)]

compiler/rustc_hir/src/lib.rs

@@ -3,7 +3,6 @@
 //! [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/hir.html
 
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(extended_key_value_attributes))]
 #![feature(in_band_lifetimes)]
 #![feature(once_cell)]
 #![feature(min_specialization)]

library/alloc/src/lib.rs

@@ -136,8 +136,7 @@
 #![feature(maybe_uninit_extra, maybe_uninit_slice, maybe_uninit_uninit_array)]
 #![feature(alloc_layout_extra)]
 #![feature(trusted_random_access)]
-#![cfg_attr(bootstrap, feature(try_trait))]
-#![cfg_attr(not(bootstrap), feature(try_trait_v2))]
+#![feature(try_trait_v2)]
 #![feature(min_type_alias_impl_trait)]
 #![feature(associated_type_bounds)]
 #![feature(slice_group_by)]

library/core/src/iter/adapters/peekable.rs

@@ -130,7 +130,6 @@ where
     }
 
     #[inline]
-    #[cfg(not(bootstrap))]
     fn try_rfold<B, F, R>(&mut self, init: B, mut f: F) -> R
     where
         Self: Sized,
@@ -150,28 +149,6 @@ where
         }
     }
 
-    #[inline]
-    #[cfg(bootstrap)]
-    fn try_rfold<B, F, R>(&mut self, init: B, mut f: F) -> R
-    where
-        Self: Sized,
-        F: FnMut(B, Self::Item) -> R,
-        R: Try<Output = B>,
-    {
-        let _use_the_import: ControlFlow<()>;
-        match self.peeked.take() {
-            Some(None) => try { init },
-            Some(Some(v)) => match self.iter.try_rfold(init, &mut f).into_result() {
-                Ok(acc) => f(acc, v),
-                Err(e) => {
-                    self.peeked = Some(Some(v));
-                    R::from_error(e)
-                }
-            },
-            None => self.iter.try_rfold(init, f),
-        }
-    }
-
     #[inline]
     fn rfold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
     where

library/core/src/iter/traits/iterator.rs

@@ -2439,7 +2439,6 @@ pub trait Iterator {
     /// ```
     #[inline]
     #[unstable(feature = "try_find", reason = "new API", issue = "63178")]
-    #[cfg(not(bootstrap))]
     fn try_find<F, R, E>(&mut self, f: F) -> Result<Option<Self::Item>, E>
     where
         Self: Sized,
@@ -2466,32 +2465,6 @@ pub trait Iterator {
         self.try_fold((), check(f)).break_value().transpose()
     }
 
-    /// We're bootstrapping.
-    #[inline]
-    #[unstable(feature = "try_find", reason = "new API", issue = "63178")]
-    #[cfg(bootstrap)]
-    fn try_find<F, R>(&mut self, f: F) -> Result<Option<Self::Item>, R::Error>
-    where
-        Self: Sized,
-        F: FnMut(&Self::Item) -> R,
-        R: Try<Output = bool>,
-    {
-        #[inline]
-        fn check<F, T, R>(mut f: F) -> impl FnMut((), T) -> ControlFlow<Result<T, R::Error>>
-        where
-            F: FnMut(&T) -> R,
-            R: Try<Output = bool>,
-        {
-            move |(), x| match f(&x).into_result() {
-                Ok(false) => ControlFlow::CONTINUE,
-                Ok(true) => ControlFlow::Break(Ok(x)),
-                Err(x) => ControlFlow::Break(Err(x)),
-            }
-        }
-
-        self.try_fold((), check(f)).break_value().transpose()
-    }
-
     /// Searches for an element in an iterator, returning its index.
     ///
     /// `position()` takes a closure that returns `true` or `false`. It applies

library/core/src/lib.rs

@@ -87,7 +87,6 @@
 #![feature(const_fn_floating_point_arithmetic)]
 #![feature(const_fn_fn_ptr_basics)]
 #![feature(const_fn_trait_bound)]
-#![cfg_attr(bootstrap, feature(const_fn))]
 #![feature(const_option)]
 #![feature(const_precise_live_drops)]
 #![feature(const_ptr_offset)]
@@ -112,7 +111,6 @@
 #![feature(doc_cfg)]
 #![feature(doc_notable_trait)]
 #![feature(duration_consts_2)]
-#![cfg_attr(bootstrap, feature(extended_key_value_attributes))]
 #![feature(extern_types)]
 #![feature(fundamental)]
 #![feature(intra_doc_pointers)]
@@ -165,7 +163,6 @@
 #![feature(slice_ptr_get)]
 #![feature(no_niche)] // rust-lang/rust#68303
 #![feature(no_coverage)] // rust-lang/rust#84605
-#![cfg_attr(bootstrap, feature(target_feature_11))]
 #![deny(unsafe_op_in_unsafe_fn)]
 #![deny(or_patterns_back_compat)]
 

library/core/src/marker.rs

@@ -31,7 +31,7 @@ use crate::hash::Hasher;
 /// [ub]: ../../reference/behavior-considered-undefined.html
 #[stable(feature = "rust1", since = "1.0.0")]
 #[cfg_attr(not(test), rustc_diagnostic_item = "send_trait")]
-#[cfg_attr(not(bootstrap), lang = "send")]
+#[lang = "send"]
 #[rustc_on_unimplemented(
     message = "`{Self}` cannot be sent between threads safely",
     label = "`{Self}` cannot be sent between threads safely"

library/core/src/ops/control_flow.rs

@@ -51,39 +51,17 @@ use crate::{convert, ops};
 pub enum ControlFlow<B, C = ()> {
     /// Move on to the next phase of the operation as normal.
     #[stable(feature = "control_flow_enum_type", since = "1.55.0")]
-    #[cfg_attr(not(bootstrap), lang = "Continue")]
+    #[lang = "Continue"]
     Continue(C),
     /// Exit the operation without running subsequent phases.
     #[stable(feature = "control_flow_enum_type", since = "1.55.0")]
-    #[cfg_attr(not(bootstrap), lang = "Break")]
+    #[lang = "Break"]
     Break(B),
     // Yes, the order of the variants doesn't match the type parameters.
     // They're in this order so that `ControlFlow<A, B>` <-> `Result<B, A>`
     // is a no-op conversion in the `Try` implementation.
 }
 
-#[unstable(feature = "control_flow_enum", reason = "new API", issue = "75744")]
-#[cfg(bootstrap)]
-impl<B, C> ops::TryV1 for ControlFlow<B, C> {
-    type Output = C;
-    type Error = B;
-    #[inline]
-    fn into_result(self) -> Result<Self::Output, Self::Error> {
-        match self {
-            ControlFlow::Continue(y) => Ok(y),
-            ControlFlow::Break(x) => Err(x),
-        }
-    }
-    #[inline]
-    fn from_error(v: Self::Error) -> Self {
-        ControlFlow::Break(v)
-    }
-    #[inline]
-    fn from_ok(v: Self::Output) -> Self {
-        ControlFlow::Continue(v)
-    }
-}
-
 #[unstable(feature = "try_trait_v2", issue = "84277")]
 impl<B, C> ops::TryV2 for ControlFlow<B, C> {
     type Output = C;
@@ -184,31 +162,9 @@ impl<B, C> ControlFlow<B, C> {
     }
 }
 
-#[cfg(bootstrap)]
-impl<R: ops::TryV1> ControlFlow<R, R::Output> {
-    /// Create a `ControlFlow` from any type implementing `Try`.
-    #[inline]
-    pub(crate) fn from_try(r: R) -> Self {
-        match R::into_result(r) {
-            Ok(v) => ControlFlow::Continue(v),
-            Err(v) => ControlFlow::Break(R::from_error(v)),
-        }
-    }
-
-    /// Convert a `ControlFlow` into any type implementing `Try`;
-    #[inline]
-    pub(crate) fn into_try(self) -> R {
-        match self {
-            ControlFlow::Continue(v) => R::from_ok(v),
-            ControlFlow::Break(v) => v,
-        }
-    }
-}
-
 /// These are used only as part of implementing the iterator adapters.
 /// They have mediocre names and non-obvious semantics, so aren't
 /// currently on a path to potential stabilization.
-#[cfg(not(bootstrap))]
 impl<R: ops::TryV2> ControlFlow<R, R::Output> {
     /// Create a `ControlFlow` from any type implementing `Try`.
     #[inline]

library/core/src/ops/mod.rs

@@ -147,8 +147,6 @@ mod function;
 mod generator;
 mod index;
 mod range;
-#[cfg(bootstrap)]
-mod r#try;
 mod try_trait;
 mod unsize;
 
@@ -183,19 +181,10 @@ pub use self::range::{Range, RangeFrom, RangeFull, RangeTo};
 #[stable(feature = "inclusive_range", since = "1.26.0")]
 pub use self::range::{Bound, RangeBounds, RangeInclusive, RangeToInclusive};
 
-#[unstable(feature = "try_trait", issue = "42327")]
-#[cfg(bootstrap)]
-pub use self::r#try::Try;
-
-#[unstable(feature = "try_trait_transition", reason = "for bootstrap", issue = "none")]
-#[cfg(bootstrap)]
-pub(crate) use self::r#try::Try as TryV1;
-
 #[unstable(feature = "try_trait_v2", issue = "84277")]
 pub use self::try_trait::FromResidual;
 
 #[unstable(feature = "try_trait_v2", issue = "84277")]
-#[cfg(not(bootstrap))]
 pub use self::try_trait::Try;
 
 #[unstable(feature = "try_trait_transition", reason = "for bootstrap", issue = "none")]

library/core/src/ops/try.rs

@@ -128,7 +128,7 @@ use crate::ops::ControlFlow;
     )
 )]
 #[doc(alias = "?")]
-#[cfg_attr(not(bootstrap), lang = "Try")]
+#[lang = "Try"]
 pub trait Try: FromResidual {
     /// The type of the value produced by `?` when *not* short-circuiting.
     #[unstable(feature = "try_trait_v2", issue = "84277")]
@@ -186,7 +186,7 @@ pub trait Try: FromResidual {
     /// let r = std::iter::empty().try_fold(4, |_, ()| -> Option<_> { unreachable!() });
     /// assert_eq!(r, Some(4));
     /// ```
-    #[cfg_attr(not(bootstrap), lang = "from_output")]
+    #[lang = "from_output"]
     #[unstable(feature = "try_trait_v2", issue = "84277")]
     fn from_output(output: Self::Output) -> Self;
 
@@ -213,7 +213,7 @@ pub trait Try: FromResidual {
     ///     ControlFlow::Break(ControlFlow::Break(3)),
     /// );
     /// ```
-    #[cfg_attr(not(bootstrap), lang = "branch")]
+    #[lang = "branch"]
     #[unstable(feature = "try_trait_v2", issue = "84277")]
     fn branch(self) -> ControlFlow<Self::Residual, Self::Output>;
 }
@@ -334,7 +334,7 @@ pub trait FromResidual<R = <Self as Try>::Residual> {
     ///     ControlFlow::Break(5),
     /// );
     /// ```
-    #[cfg_attr(not(bootstrap), lang = "from_residual")]
+    #[lang = "from_residual"]
     #[unstable(feature = "try_trait_v2", issue = "84277")]
     fn from_residual(residual: R) -> Self;
 }

library/core/src/ops/try_trait.rs

@@ -1636,38 +1636,6 @@ impl<A, V: FromIterator<A>> FromIterator<Option<A>> for Option<V> {
     }
 }
 
-/// The error type that results from applying the try operator (`?`) to a `None` value. If you wish
-/// to allow `x?` (where `x` is an `Option<T>`) to be converted into your error type, you can
-/// implement `impl From<NoneError>` for `YourErrorType`. In that case, `x?` within a function that
-/// returns `Result<_, YourErrorType>` will translate a `None` value into an `Err` result.
-#[rustc_diagnostic_item = "none_error"]
-#[unstable(feature = "try_trait", issue = "42327")]
-#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash)]
-#[cfg(bootstrap)]
-pub struct NoneError;
-
-#[unstable(feature = "try_trait", issue = "42327")]
-#[cfg(bootstrap)]
-impl<T> ops::TryV1 for Option<T> {
-    type Output = T;
-    type Error = NoneError;
-
-    #[inline]
-    fn into_result(self) -> Result<T, NoneError> {
-        self.ok_or(NoneError)
-    }
-
-    #[inline]
-    fn from_ok(v: T) -> Self {
-        Some(v)
-    }
-
-    #[inline]
-    fn from_error(_: NoneError) -> Self {
-        None
-    }
-}
-
 #[unstable(feature = "try_trait_v2", issue = "84277")]
 impl<T> ops::TryV2 for Option<T> {
     type Output = T;