Auto merge of #119211 - rust-lang:pa-master-1.77, r=Mark-Simulacrum

Bump stage0 to 1.76 beta

r? `@Mark-Simulacrum`

9 files changed, 10 insertions, 283 deletions

diff --git a/compiler/rustc_codegen_cranelift/src/lib.rs b/compiler/rustc_codegen_cranelift/src/lib.rs
index 148193b5a97..d0ce209be44 100644
--- a/compiler/rustc_codegen_cranelift/src/lib.rs
+++ b/compiler/rustc_codegen_cranelift/src/lib.rs
@@ -1,6 +1,6 @@
-#![cfg_attr(all(doc, not(bootstrap)), allow(internal_features))]
-#![cfg_attr(all(doc, not(bootstrap)), feature(rustdoc_internals))]
-#![cfg_attr(all(doc, not(bootstrap)), doc(rust_logo))]
+#![cfg_attr(doc, allow(internal_features))]
+#![cfg_attr(doc, feature(rustdoc_internals))]
+#![cfg_attr(doc, doc(rust_logo))]
 #![feature(rustc_private)]
 // Note: please avoid adding other feature gates where possible
 #![warn(rust_2018_idioms)]
diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
index 3c42eb21d07..a81056ed3ad 100644
--- a/compiler/rustc_codegen_llvm/src/lib.rs
+++ b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -8,7 +8,6 @@
 #![feature(rustdoc_internals)]
 #![doc(rust_logo)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![cfg_attr(bootstrap, feature(c_str_literals))]
 #![feature(exact_size_is_empty)]
 #![feature(extern_types)]
 #![feature(hash_raw_entry)]
diff --git a/compiler/rustc_data_structures/src/tagged_ptr/impl_tag.rs b/compiler/rustc_data_structures/src/tagged_ptr/impl_tag.rs
index cafa91c8b8b..f17a0bf26d7 100644
--- a/compiler/rustc_data_structures/src/tagged_ptr/impl_tag.rs
+++ b/compiler/rustc_data_structures/src/tagged_ptr/impl_tag.rs
@@ -81,150 +81,6 @@
 ///     E::A,
 /// }
 /// ```
-#[cfg(bootstrap)]
-#[macro_export]
-macro_rules! impl_tag {
-    (
-        impl Tag for $Self:ty;
-        $(
-            $($path:ident)::* $( { $( $fields:tt )* })?,
-        )*
-    ) => {
-        // Safety:
-        // `bits_for_tags` is called on the same `${index()}`-es as
-        // `into_usize` returns, thus `BITS` constant is correct.
-        unsafe impl $crate::tagged_ptr::Tag for $Self {
-            const BITS: u32 = $crate::tagged_ptr::bits_for_tags(&[
-                $(
-                    ${index()},
-                    $( ${ignore(path)} )*
-                )*
-            ]);
-
-            #[inline]
-            fn into_usize(self) -> usize {
-                // This forbids use of repeating patterns (`Enum::V`&`Enum::V`, etc)
-                // (or at least it should, see <https://github.com/rust-lang/rust/issues/110613>)
-                #[forbid(unreachable_patterns)]
-                match self {
-                    // `match` is doing heavy lifting here, by requiring exhaustiveness
-                    $(
-                        $($path)::* $( { $( $fields )* } )? => ${index()},
-                    )*
-                }
-            }
-
-            #[inline]
-            unsafe fn from_usize(tag: usize) -> Self {
-                match tag {
-                    $(
-                        ${index()} => $($path)::* $( { $( $fields )* } )?,
-                    )*
-
-                    // Safety:
-                    // `into_usize` only returns `${index()}` of the same
-                    // repetition as we are filtering above, thus if this is
-                    // reached, the safety contract of this function was
-                    // already breached.
-                    _ => unsafe {
-                        debug_assert!(
-                            false,
-                            "invalid tag: {tag}\
-                             (this is a bug in the caller of `from_usize`)"
-                        );
-                        std::hint::unreachable_unchecked()
-                    },
-                }
-            }
-
-        }
-    };
-}
-
-/// Implements [`Tag`] for a given type.
-///
-/// You can use `impl_tag` on structs and enums.
-/// You need to specify the type and all its possible values,
-/// which can only be paths with optional fields.
-///
-/// [`Tag`]: crate::tagged_ptr::Tag
-///
-/// # Examples
-///
-/// Basic usage:
-///
-/// ```
-/// #![feature(macro_metavar_expr)]
-/// use rustc_data_structures::{impl_tag, tagged_ptr::Tag};
-///
-/// #[derive(Copy, Clone, PartialEq, Debug)]
-/// enum SomeTag {
-///     A,
-///     B,
-///     X { v: bool },
-///     Y(bool, bool),
-/// }
-///
-/// impl_tag! {
-///     // The type for which the `Tag` will be implemented
-///     impl Tag for SomeTag;
-///     // You need to specify all possible tag values:
-///     SomeTag::A, // 0
-///     SomeTag::B, // 1
-///     // For variants with fields, you need to specify the fields:
-///     SomeTag::X { v: true  }, // 2
-///     SomeTag::X { v: false }, // 3
-///     // For tuple variants use named syntax:
-///     SomeTag::Y { 0: true,  1: true  }, // 4
-///     SomeTag::Y { 0: false, 1: true  }, // 5
-///     SomeTag::Y { 0: true,  1: false }, // 6
-///     SomeTag::Y { 0: false, 1: false }, // 7
-/// }
-///
-/// // Tag values are assigned in order:
-/// assert_eq!(SomeTag::A.into_usize(), 0);
-/// assert_eq!(SomeTag::X { v: false }.into_usize(), 3);
-/// assert_eq!(SomeTag::Y(false, true).into_usize(), 5);
-///
-/// assert_eq!(unsafe { SomeTag::from_usize(1) }, SomeTag::B);
-/// assert_eq!(unsafe { SomeTag::from_usize(2) }, SomeTag::X { v: true });
-/// assert_eq!(unsafe { SomeTag::from_usize(7) }, SomeTag::Y(false, false));
-/// ```
-///
-/// Structs are supported:
-///
-/// ```
-/// #![feature(macro_metavar_expr)]
-/// # use rustc_data_structures::impl_tag;
-/// #[derive(Copy, Clone)]
-/// struct Flags { a: bool, b: bool }
-///
-/// impl_tag! {
-///     impl Tag for Flags;
-///     Flags { a: true,  b: true  },
-///     Flags { a: false, b: true  },
-///     Flags { a: true,  b: false },
-///     Flags { a: false, b: false },
-/// }
-/// ```
-///
-/// Not specifying all values results in a compile error:
-///
-/// ```compile_fail,E0004
-/// #![feature(macro_metavar_expr)]
-/// # use rustc_data_structures::impl_tag;
-/// #[derive(Copy, Clone)]
-/// enum E {
-///     A,
-///     B,
-/// }
-///
-/// impl_tag! {
-///     impl Tag for E;
-///     E::A,
-/// }
-/// ```
-#[cfg(not(bootstrap))]
 #[macro_export]
 macro_rules! impl_tag {
     (
diff --git a/compiler/rustc_expand/src/expand.rs b/compiler/rustc_expand/src/expand.rs
index 89caf8aa231..da727ddb208 100644
--- a/compiler/rustc_expand/src/expand.rs
+++ b/compiler/rustc_expand/src/expand.rs
@@ -41,132 +41,6 @@ use std::path::PathBuf;
 use std::rc::Rc;
 use std::{iter, mem};
 
-#[cfg(bootstrap)]
-macro_rules! ast_fragments {
-    (
-        $($Kind:ident($AstTy:ty) {
-            $kind_name:expr;
-            $(one fn $mut_visit_ast:ident; fn $visit_ast:ident;)?
-            $(many fn $flat_map_ast_elt:ident; fn $visit_ast_elt:ident($($args:tt)*);)?
-            fn $make_ast:ident;
-        })*
-    ) => {
-        /// A fragment of AST that can be produced by a single macro expansion.
-        /// Can also serve as an input and intermediate result for macro expansion operations.
-        pub enum AstFragment {
-            OptExpr(Option<P<ast::Expr>>),
-            MethodReceiverExpr(P<ast::Expr>),
-            $($Kind($AstTy),)*
-        }
-
-        /// "Discriminant" of an AST fragment.
-        #[derive(Copy, Clone, PartialEq, Eq)]
-        pub enum AstFragmentKind {
-            OptExpr,
-            MethodReceiverExpr,
-            $($Kind,)*
-        }
-
-        impl AstFragmentKind {
-            pub fn name(self) -> &'static str {
-                match self {
-                    AstFragmentKind::OptExpr => "expression",
-                    AstFragmentKind::MethodReceiverExpr => "expression",
-                    $(AstFragmentKind::$Kind => $kind_name,)*
-                }
-            }
-
-            fn make_from<'a>(self, result: Box<dyn MacResult + 'a>) -> Option<AstFragment> {
-                match self {
-                    AstFragmentKind::OptExpr =>
-                        result.make_expr().map(Some).map(AstFragment::OptExpr),
-                    AstFragmentKind::MethodReceiverExpr =>
-                        result.make_expr().map(AstFragment::MethodReceiverExpr),
-                    $(AstFragmentKind::$Kind => result.$make_ast().map(AstFragment::$Kind),)*
-                }
-            }
-        }
-
-        impl AstFragment {
-            pub fn add_placeholders(&mut self, placeholders: &[NodeId]) {
-                if placeholders.is_empty() {
-                    return;
-                }
-                match self {
-                    $($(AstFragment::$Kind(ast) => ast.extend(placeholders.iter().flat_map(|id| {
-                        ${ignore(flat_map_ast_elt)}
-                        placeholder(AstFragmentKind::$Kind, *id, None).$make_ast()
-                    })),)?)*
-                    _ => panic!("unexpected AST fragment kind")
-                }
-            }
-
-            pub fn make_opt_expr(self) -> Option<P<ast::Expr>> {
-                match self {
-                    AstFragment::OptExpr(expr) => expr,
-                    _ => panic!("AstFragment::make_* called on the wrong kind of fragment"),
-                }
-            }
-
-            pub fn make_method_receiver_expr(self) -> P<ast::Expr> {
-                match self {
-                    AstFragment::MethodReceiverExpr(expr) => expr,
-                    _ => panic!("AstFragment::make_* called on the wrong kind of fragment"),
-                }
-            }
-
-            $(pub fn $make_ast(self) -> $AstTy {
-                match self {
-                    AstFragment::$Kind(ast) => ast,
-                    _ => panic!("AstFragment::make_* called on the wrong kind of fragment"),
-                }
-            })*
-
-            fn make_ast<T: InvocationCollectorNode>(self) -> T::OutputTy {
-                T::fragment_to_output(self)
-            }
-
-            pub fn mut_visit_with<F: MutVisitor>(&mut self, vis: &mut F) {
-                match self {
-                    AstFragment::OptExpr(opt_expr) => {
-                        visit_clobber(opt_expr, |opt_expr| {
-                            if let Some(expr) = opt_expr {
-                                vis.filter_map_expr(expr)
-                            } else {
-                                None
-                            }
-                        });
-                    }
-                    AstFragment::MethodReceiverExpr(expr) => vis.visit_method_receiver_expr(expr),
-                    $($(AstFragment::$Kind(ast) => vis.$mut_visit_ast(ast),)?)*
-                    $($(AstFragment::$Kind(ast) =>
-                        ast.flat_map_in_place(|ast| vis.$flat_map_ast_elt(ast)),)?)*
-                }
-            }
-
-            pub fn visit_with<'a, V: Visitor<'a>>(&'a self, visitor: &mut V) {
-                match self {
-                    AstFragment::OptExpr(Some(expr)) => visitor.visit_expr(expr),
-                    AstFragment::OptExpr(None) => {}
-                    AstFragment::MethodReceiverExpr(expr) => visitor.visit_method_receiver_expr(expr),
-                    $($(AstFragment::$Kind(ast) => visitor.$visit_ast(ast),)?)*
-                    $($(AstFragment::$Kind(ast) => for ast_elt in &ast[..] {
-                        visitor.$visit_ast_elt(ast_elt, $($args)*);
-                    })?)*
-                }
-            }
-        }
-
-        impl<'a> MacResult for crate::mbe::macro_rules::ParserAnyMacro<'a> {
-            $(fn $make_ast(self: Box<crate::mbe::macro_rules::ParserAnyMacro<'a>>)
-                           -> Option<$AstTy> {
-                Some(self.make(AstFragmentKind::$Kind).$make_ast())
-            })*
-        }
-    }
-}
-
-#[cfg(not(bootstrap))]
 macro_rules! ast_fragments {
     (
         $($Kind:ident($AstTy:ty) {
diff --git a/compiler/rustc_feature/src/accepted.rs b/compiler/rustc_feature/src/accepted.rs
index 4993112089a..aa0db9891a5 100644
--- a/compiler/rustc_feature/src/accepted.rs
+++ b/compiler/rustc_feature/src/accepted.rs
@@ -77,7 +77,7 @@ declare_features! (
     /// Allows empty structs and enum variants with braces.
     (accepted, braced_empty_structs, "1.8.0", Some(29720)),
     /// Allows `c"foo"` literals.
-    (accepted, c_str_literals, "CURRENT_RUSTC_VERSION", Some(105723)),
+    (accepted, c_str_literals, "1.76.0", Some(105723)),
     /// Allows `#[cfg_attr(predicate, multiple, attributes, here)]`.
     (accepted, cfg_attr_multi, "1.33.0", Some(54881)),
     /// Allows the use of `#[cfg(doctest)]`, set when rustdoc is collecting doctests.
@@ -341,7 +341,7 @@ declare_features! (
     (accepted, track_caller, "1.46.0", Some(47809)),
     /// Allows dyn upcasting trait objects via supertraits.
     /// Dyn upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`.
-    (accepted, trait_upcasting, "CURRENT_RUSTC_VERSION", Some(65991)),
+    (accepted, trait_upcasting, "1.76.0", Some(65991)),
     /// Allows #[repr(transparent)] on univariant enums (RFC 2645).
     (accepted, transparent_enums, "1.42.0", Some(60405)),
     /// Allows indexing tuples.
diff --git a/compiler/rustc_feature/src/removed.rs b/compiler/rustc_feature/src/removed.rs
index 0d9b8b344cf..67ee53d8ae5 100644
--- a/compiler/rustc_feature/src/removed.rs
+++ b/compiler/rustc_feature/src/removed.rs
@@ -177,7 +177,7 @@ declare_features! (
     /// Allows using the `#[register_attr]` attribute.
     (removed, register_attr, "1.65.0", Some(66080),
      Some("removed in favor of `#![register_tool]`")),
-    (removed, rust_2018_preview, "CURRENT_RUSTC_VERSION", None,
+    (removed, rust_2018_preview, "1.76.0", None,
      Some("2018 Edition preview is no longer relevant")),
     /// Allows using the macros:
     /// + `__diagnostic_used`
diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs
index bb1c95c25d7..60586f54fd5 100644
--- a/compiler/rustc_feature/src/unstable.rs
+++ b/compiler/rustc_feature/src/unstable.rs
@@ -204,7 +204,7 @@ declare_features! (
     /// Allows using `#[lang = ".."]` attribute for linking items to special compiler logic.
     (internal, lang_items, "1.0.0", None),
     /// Changes `impl Trait` to capture all lifetimes in scope.
-    (unstable, lifetime_capture_rules_2024, "CURRENT_RUSTC_VERSION", None),
+    (unstable, lifetime_capture_rules_2024, "1.76.0", None),
     /// Allows `#[link(..., cfg(..))]`; perma-unstable per #37406
     (unstable, link_cfg, "1.14.0", None),
     /// Allows the `multiple_supertrait_upcastable` lint.
@@ -470,7 +470,7 @@ declare_features! (
     /// Allows using `#[repr(align(...))]` on function items
     (unstable, fn_align, "1.53.0", Some(82232)),
     /// Support delegating implementation of functions to other already implemented functions.
-    (incomplete, fn_delegation, "CURRENT_RUSTC_VERSION", Some(118212)),
+    (incomplete, fn_delegation, "1.76.0", Some(118212)),
     /// Allows defining gen blocks and `gen fn`.
     (unstable, gen_blocks, "1.75.0", Some(117078)),
     /// Infer generic args for both consts and types.
@@ -507,7 +507,7 @@ declare_features! (
     (unstable, let_chains, "1.37.0", Some(53667)),
     /// Allows using `#[link(kind = "link-arg", name = "...")]`
     /// to pass custom arguments to the linker.
-    (unstable, link_arg_attribute, "CURRENT_RUSTC_VERSION", Some(99427)),
+    (unstable, link_arg_attribute, "1.76.0", Some(99427)),
     /// Allows using `reason` in lint attributes and the `#[expect(lint)]` lint check.
     (unstable, lint_reasons, "1.31.0", Some(54503)),
     /// Give access to additional metadata about declarative macro meta-variables.
@@ -529,7 +529,7 @@ declare_features! (
     /// Allow negative trait implementations.
     (unstable, negative_impls, "1.44.0", Some(68318)),
     /// Allows the `!` pattern.
-    (incomplete, never_patterns, "CURRENT_RUSTC_VERSION", Some(118155)),
+    (incomplete, never_patterns, "1.76.0", Some(118155)),
     /// Allows the `!` type. Does not imply 'exhaustive_patterns' (below) any more.
     (unstable, never_type, "1.13.0", Some(35121)),
     /// Allows diverging expressions to fall back to `!` rather than `()`.
diff --git a/compiler/rustc_lint/src/lib.rs b/compiler/rustc_lint/src/lib.rs
index a4ab5527e3f..0fc24e88b3b 100644
--- a/compiler/rustc_lint/src/lib.rs
+++ b/compiler/rustc_lint/src/lib.rs
@@ -39,7 +39,6 @@
 #![feature(min_specialization)]
 #![feature(never_type)]
 #![feature(rustc_attrs)]
-#![cfg_attr(bootstrap, feature(trait_upcasting))]
 #![recursion_limit = "256"]
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
diff --git a/compiler/rustc_middle/src/lib.rs b/compiler/rustc_middle/src/lib.rs
index e048268fad1..3475e582a8f 100644
--- a/compiler/rustc_middle/src/lib.rs
+++ b/compiler/rustc_middle/src/lib.rs
@@ -49,7 +49,6 @@
 #![feature(associated_type_bounds)]
 #![feature(rustc_attrs)]
 #![feature(control_flow_enum)]
-#![cfg_attr(bootstrap, feature(trait_upcasting))]
 #![feature(trusted_step)]
 #![feature(try_blocks)]
 #![feature(try_reserve_kind)]