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Auto merge of #119211 - rust-lang:pa-master-1.77, r=Mark-Simulacrum
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Bump stage0 to 1.76 beta

r? `@Mark-Simulacrum`
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bors committed Dec 23, 2023
2 parents 467d1d9 + f9f5840 commit 495203b
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Showing 27 changed files with 455 additions and 885 deletions.
6 changes: 3 additions & 3 deletions compiler/rustc_codegen_cranelift/src/lib.rs
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@@ -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)]
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1 change: 0 additions & 1 deletion compiler/rustc_codegen_llvm/src/lib.rs
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Expand Up @@ -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)]
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144 changes: 0 additions & 144 deletions compiler/rustc_data_structures/src/tagged_ptr/impl_tag.rs
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Expand Up @@ -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 {
(
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126 changes: 0 additions & 126 deletions compiler/rustc_expand/src/expand.rs
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Expand Up @@ -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) {
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4 changes: 2 additions & 2 deletions compiler/rustc_feature/src/accepted.rs
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Expand Up @@ -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.
Expand Down Expand Up @@ -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.
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2 changes: 1 addition & 1 deletion compiler/rustc_feature/src/removed.rs
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Expand Up @@ -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`
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8 changes: 4 additions & 4 deletions compiler/rustc_feature/src/unstable.rs
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Expand Up @@ -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.
Expand Down Expand Up @@ -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.
Expand Down Expand Up @@ -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.
Expand All @@ -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 `()`.
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1 change: 0 additions & 1 deletion compiler/rustc_lint/src/lib.rs
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Expand Up @@ -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)]
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1 change: 0 additions & 1 deletion compiler/rustc_middle/src/lib.rs
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Expand Up @@ -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)]
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2 changes: 1 addition & 1 deletion library/alloc/src/rc.rs
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Expand Up @@ -1768,7 +1768,7 @@ impl<T: Clone, A: Allocator + Clone> Rc<T, A> {
/// assert!(ptr::eq(ptr, inner.as_ptr()));
/// ```
#[inline]
#[stable(feature = "arc_unwrap_or_clone", since = "CURRENT_RUSTC_VERSION")]
#[stable(feature = "arc_unwrap_or_clone", since = "1.76.0")]
pub fn unwrap_or_clone(this: Self) -> T {
Rc::try_unwrap(this).unwrap_or_else(|rc| (*rc).clone())
}
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2 changes: 1 addition & 1 deletion library/alloc/src/sync.rs
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Expand Up @@ -2194,7 +2194,7 @@ impl<T: Clone, A: Allocator + Clone> Arc<T, A> {
/// assert!(ptr::eq(ptr, inner.as_ptr()));
/// ```
#[inline]
#[stable(feature = "arc_unwrap_or_clone", since = "CURRENT_RUSTC_VERSION")]
#[stable(feature = "arc_unwrap_or_clone", since = "1.76.0")]
pub fn unwrap_or_clone(this: Self) -> T {
Arc::try_unwrap(this).unwrap_or_else(|arc| (*arc).clone())
}
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