Handle cfg(bootstrap) throughout

Author: Mark-Simulacrum

src/bootstrap/bin/rustc.rs

@@ -132,10 +132,7 @@ fn main() {
         cmd.arg("-Dwarnings");
         cmd.arg("-Drust_2018_idioms");
         cmd.arg("-Dunused_lifetimes");
-        // cfg(not(bootstrap)): Remove this during the next stage 0 compiler update.
-        // `-Drustc::internal` is a new feature and `rustc_version` mis-reports the `stage`.
-        let cfg_not_bootstrap = stage != "0" && crate_name != Some("rustc_version");
-        if cfg_not_bootstrap && use_internal_lints(crate_name) {
+        if use_internal_lints(crate_name) {
             cmd.arg("-Zunstable-options");
             cmd.arg("-Drustc::internal");
         }

src/bootstrap/builder.rs

@@ -145,7 +145,7 @@ impl StepDescription {
             only_hosts: S::ONLY_HOSTS,
             should_run: S::should_run,
             make_run: S::make_run,
-            name: unsafe { ::std::intrinsics::type_name::<S>() },
+            name: std::any::type_name::<S>(),
         }
     }
 

src/liballoc/collections/btree/node.rs

@@ -106,8 +106,8 @@ impl<K, V> LeafNode<K, V> {
         LeafNode {
             // As a general policy, we leave fields uninitialized if they can be, as this should
             // be both slightly faster and easier to track in Valgrind.
-            keys: uninit_array![_; CAPACITY],
-            vals: uninit_array![_; CAPACITY],
+            keys: [MaybeUninit::UNINIT; CAPACITY],
+            vals: [MaybeUninit::UNINIT; CAPACITY],
             parent: ptr::null(),
             parent_idx: MaybeUninit::uninit(),
             len: 0
@@ -159,7 +159,7 @@ impl<K, V> InternalNode<K, V> {
     unsafe fn new() -> Self {
         InternalNode {
             data: LeafNode::new(),
-            edges: uninit_array![_; 2*B],
+            edges: [MaybeUninit::UNINIT; 2*B]
         }
     }
 }

src/liballoc/lib.rs

@@ -69,7 +69,7 @@
 #![warn(missing_debug_implementations)]
 #![deny(intra_doc_link_resolution_failure)] // rustdoc is run without -D warnings
 #![allow(explicit_outlives_requirements)]
-#![cfg_attr(not(bootstrap), allow(incomplete_features))]
+#![allow(incomplete_features)]
 
 #![cfg_attr(not(test), feature(generator_trait))]
 #![cfg_attr(test, feature(test))]
@@ -84,7 +84,7 @@
 #![feature(coerce_unsized)]
 #![feature(const_generic_impls_guard)]
 #![feature(const_generics)]
-#![cfg_attr(not(bootstrap), feature(const_in_array_repeat_expressions))]
+#![feature(const_in_array_repeat_expressions)]
 #![feature(dispatch_from_dyn)]
 #![feature(core_intrinsics)]
 #![feature(dropck_eyepatch)]
@@ -118,7 +118,7 @@
 #![feature(rustc_const_unstable)]
 #![feature(const_vec_new)]
 #![feature(slice_partition_dedup)]
-#![feature(maybe_uninit_extra, maybe_uninit_slice, maybe_uninit_array)]
+#![feature(maybe_uninit_extra, maybe_uninit_slice)]
 #![feature(alloc_layout_extra)]
 #![feature(try_trait)]
 #![feature(mem_take)]

src/libcore/any.rs

@@ -470,10 +470,5 @@ impl TypeId {
 #[stable(feature = "type_name", since = "1.38.0")]
 #[rustc_const_unstable(feature = "const_type_name")]
 pub const fn type_name<T: ?Sized>() -> &'static str {
-    #[cfg(bootstrap)]
-    unsafe {
-        intrinsics::type_name::<T>()
-    }
-    #[cfg(not(bootstrap))]
     intrinsics::type_name::<T>()
 }

src/libcore/char/methods.rs

@@ -553,12 +553,7 @@ impl char {
     /// `XID_Start` is a Unicode Derived Property specified in
     /// [UAX #31](http://unicode.org/reports/tr31/#NFKC_Modifications),
     /// mostly similar to `ID_Start` but modified for closure under `NFKx`.
-    #[cfg_attr(bootstrap,
-               unstable(feature = "rustc_private",
-                        reason = "mainly needed for compiler internals",
-                        issue = "27812"))]
-    #[cfg_attr(not(bootstrap),
-               unstable(feature = "unicode_internals", issue = "0"))]
+    #[unstable(feature = "unicode_internals", issue = "0")]
     pub fn is_xid_start(self) -> bool {
         derived_property::XID_Start(self)
     }
@@ -569,12 +564,7 @@ impl char {
     /// `XID_Continue` is a Unicode Derived Property specified in
     /// [UAX #31](http://unicode.org/reports/tr31/#NFKC_Modifications),
     /// mostly similar to `ID_Continue` but modified for closure under NFKx.
-    #[cfg_attr(bootstrap,
-               unstable(feature = "rustc_private",
-                        reason = "mainly needed for compiler internals",
-                        issue = "27812"))]
-    #[cfg_attr(not(bootstrap),
-               unstable(feature = "unicode_internals", issue = "0"))]
+    #[unstable(feature = "unicode_internals", issue = "0")]
     #[inline]
     pub fn is_xid_continue(self) -> bool {
         derived_property::XID_Continue(self)

src/libcore/clone.rs

@@ -134,7 +134,6 @@ pub trait Clone : Sized {
 }
 
 /// Derive macro generating an impl of the trait `Clone`.
-#[cfg(not(bootstrap))]
 #[rustc_builtin_macro]
 #[rustc_macro_transparency = "semitransparent"]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]

src/libcore/cmp.rs

@@ -201,7 +201,6 @@ pub trait PartialEq<Rhs: ?Sized = Self> {
 }
 
 /// Derive macro generating an impl of the trait `PartialEq`.
-#[cfg(not(bootstrap))]
 #[rustc_builtin_macro]
 #[rustc_macro_transparency = "semitransparent"]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
@@ -265,7 +264,6 @@ pub trait Eq: PartialEq<Self> {
 }
 
 /// Derive macro generating an impl of the trait `Eq`.
-#[cfg(not(bootstrap))]
 #[rustc_builtin_macro]
 #[rustc_macro_transparency = "semitransparent"]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
@@ -617,7 +615,6 @@ pub trait Ord: Eq + PartialOrd<Self> {
 }
 
 /// Derive macro generating an impl of the trait `Ord`.
-#[cfg(not(bootstrap))]
 #[rustc_builtin_macro]
 #[rustc_macro_transparency = "semitransparent"]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
@@ -867,7 +864,6 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
 }
 
 /// Derive macro generating an impl of the trait `PartialOrd`.
-#[cfg(not(bootstrap))]
 #[rustc_builtin_macro]
 #[rustc_macro_transparency = "semitransparent"]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]

src/libcore/default.rs

@@ -116,7 +116,6 @@ pub trait Default: Sized {
 }
 
 /// Derive macro generating an impl of the trait `Default`.
-#[cfg(not(bootstrap))]
 #[rustc_builtin_macro]
 #[rustc_macro_transparency = "semitransparent"]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]

src/libcore/fmt/mod.rs

@@ -546,7 +546,6 @@ pub trait Debug {
 }
 
 // Separate module to reexport the macro `Debug` from prelude without the trait `Debug`.
-#[cfg(not(bootstrap))]
 pub(crate) mod macros {
     /// Derive macro generating an impl of the trait `Debug`.
     #[rustc_builtin_macro]
@@ -555,7 +554,6 @@ pub(crate) mod macros {
     #[allow_internal_unstable(core_intrinsics)]
     pub macro Debug($item:item) { /* compiler built-in */ }
 }
-#[cfg(not(bootstrap))]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[doc(inline)]
 pub use macros::Debug;