Auto merge of #3197 - RalfJung:rustup, r=RalfJung

Rustup

also move some fail tests into suitable subdirectories

Author: bors

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
           - name: mingw-check-tidy
             os: ubuntu-20.04-4core-16gb
             env: {}
-          - name: x86_64-gnu-llvm-15
+          - name: x86_64-gnu-llvm-16
             env:
               ENABLE_GCC_CODEGEN: "1"
             os: ubuntu-20.04-16core-64gb
@@ -302,10 +302,6 @@ jobs:
             env:
               RUST_BACKTRACE: 1
             os: ubuntu-20.04-8core-32gb
-          - name: x86_64-gnu-llvm-15
-            env:
-              RUST_BACKTRACE: 1
-            os: ubuntu-20.04-8core-32gb
           - name: x86_64-gnu-nopt
             os: ubuntu-20.04-4core-16gb
             env: {}

.mailmap

@@ -575,7 +575,8 @@ Val Markovic <val@markovic.io>
 Valerii Lashmanov <vflashm@gmail.com>
 Vitali Haravy <HumaneProgrammer@gmail.com> Vitali Haravy <humaneprogrammer@gmail.com>
 Vitaly Shukela <vi0oss@gmail.com>
-Waffle Maybe <waffle.lapkin@gmail.com>
+Waffle Lapkin <waffle.lapkin@gmail.com>
+Waffle Lapkin <waffle.lapkin@tasking.com>
 Wesley Wiser <wwiser@gmail.com> <wesleywiser@microsoft.com>
 whitequark <whitequark@whitequark.org>
 William Ting <io@williamting.com> <william.h.ting@gmail.com>

compiler/rustc_ast/src/ast.rs

@@ -645,6 +645,7 @@ impl Pat {
             // These patterns do not contain subpatterns, skip.
             PatKind::Wild
             | PatKind::Rest
+            | PatKind::Never
             | PatKind::Lit(_)
             | PatKind::Range(..)
             | PatKind::Ident(..)
@@ -795,6 +796,9 @@ pub enum PatKind {
     /// only one rest pattern may occur in the pattern sequences.
     Rest,
 
+    // A never pattern `!`
+    Never,
+
     /// Parentheses in patterns used for grouping (i.e., `(PAT)`).
     Paren(P<Pat>),
 
@@ -817,7 +821,7 @@ pub enum BorrowKind {
     Raw,
 }
 
-#[derive(Clone, PartialEq, Encodable, Decodable, Debug, Copy)]
+#[derive(Clone, Copy, Debug, PartialEq, Encodable, Decodable, HashStable_Generic)]
 pub enum BinOpKind {
     /// The `+` operator (addition)
     Add,
@@ -858,9 +862,9 @@ pub enum BinOpKind {
 }
 
 impl BinOpKind {
-    pub fn to_string(&self) -> &'static str {
+    pub fn as_str(&self) -> &'static str {
         use BinOpKind::*;
-        match *self {
+        match self {
             Add => "+",
             Sub => "-",
             Mul => "*",
@@ -881,27 +885,33 @@ impl BinOpKind {
             Gt => ">",
         }
     }
-    pub fn lazy(&self) -> bool {
+
+    pub fn is_lazy(&self) -> bool {
         matches!(self, BinOpKind::And | BinOpKind::Or)
     }
 
     pub fn is_comparison(&self) -> bool {
         use BinOpKind::*;
-        // Note for developers: please keep this as is;
+        // Note for developers: please keep this match exhaustive;
         // we want compilation to fail if another variant is added.
         match *self {
             Eq | Lt | Le | Ne | Gt | Ge => true,
             And | Or | Add | Sub | Mul | Div | Rem | BitXor | BitAnd | BitOr | Shl | Shr => false,
         }
     }
+
+    /// Returns `true` if the binary operator takes its arguments by value.
+    pub fn is_by_value(self) -> bool {
+        !self.is_comparison()
+    }
 }
 
 pub type BinOp = Spanned<BinOpKind>;
 
 /// Unary operator.
 ///
 /// Note that `&data` is not an operator, it's an `AddrOf` expression.
-#[derive(Clone, Encodable, Decodable, Debug, Copy)]
+#[derive(Clone, Copy, Debug, PartialEq, Encodable, Decodable, HashStable_Generic)]
 pub enum UnOp {
     /// The `*` operator for dereferencing
     Deref,
@@ -912,13 +922,18 @@ pub enum UnOp {
 }
 
 impl UnOp {
-    pub fn to_string(op: UnOp) -> &'static str {
-        match op {
+    pub fn as_str(&self) -> &'static str {
+        match self {
             UnOp::Deref => "*",
             UnOp::Not => "!",
             UnOp::Neg => "-",
         }
     }
+
+    /// Returns `true` if the unary operator takes its argument by value.
+    pub fn is_by_value(self) -> bool {
+        matches!(self, Self::Neg | Self::Not)
+    }
 }
 
 /// A statement

compiler/rustc_ast/src/mut_visit.rs

@@ -1249,7 +1249,7 @@ pub fn noop_visit_pat<T: MutVisitor>(pat: &mut P<Pat>, vis: &mut T) {
     let Pat { id, kind, span, tokens } = pat.deref_mut();
     vis.visit_id(id);
     match kind {
-        PatKind::Wild | PatKind::Rest => {}
+        PatKind::Wild | PatKind::Rest | PatKind::Never => {}
         PatKind::Ident(_binding_mode, ident, sub) => {
             vis.visit_ident(ident);
             visit_opt(sub, |sub| vis.visit_pat(sub));

compiler/rustc_ast/src/token.rs

@@ -756,6 +756,11 @@ impl Token {
         )
     }
 
+    /// Returns `true` if the token is the integer literal.
+    pub fn is_integer_lit(&self) -> bool {
+        matches!(self.kind, Literal(Lit { kind: LitKind::Integer, .. }))
+    }
+
     /// Returns `true` if the token is a non-raw identifier for which `pred` holds.
     pub fn is_non_raw_ident_where(&self, pred: impl FnOnce(Ident) -> bool) -> bool {
         match self.ident() {

compiler/rustc_ast/src/visit.rs

@@ -559,7 +559,7 @@ pub fn walk_pat<'a, V: Visitor<'a>>(visitor: &mut V, pattern: &'a Pat) {
             walk_list!(visitor, visit_expr, lower_bound);
             walk_list!(visitor, visit_expr, upper_bound);
         }
-        PatKind::Wild | PatKind::Rest => {}
+        PatKind::Wild | PatKind::Rest | PatKind::Never => {}
         PatKind::Tuple(elems) | PatKind::Slice(elems) | PatKind::Or(elems) => {
             walk_list!(visitor, visit_pat, elems);
         }

compiler/rustc_ast_lowering/src/asm.rs

@@ -228,6 +228,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                                 parent_def_id.def_id,
                                 node_id,
                                 DefPathData::AnonConst,
+                                DefKind::AnonConst,
                                 *op_sp,
                             );
                             let anon_const = AnonConst { id: node_id, value: P(expr) };

compiler/rustc_ast_lowering/src/expr.rs

@@ -12,7 +12,7 @@ use rustc_ast::ptr::P as AstP;
 use rustc_ast::*;
 use rustc_data_structures::stack::ensure_sufficient_stack;
 use rustc_hir as hir;
-use rustc_hir::def::Res;
+use rustc_hir::def::{DefKind, Res};
 use rustc_hir::definitions::DefPathData;
 use rustc_session::errors::report_lit_error;
 use rustc_span::source_map::{respan, Spanned};
@@ -72,7 +72,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
             let kind = match &e.kind {
                 ExprKind::Array(exprs) => hir::ExprKind::Array(self.lower_exprs(exprs)),
                 ExprKind::ConstBlock(c) => {
-                    let c = self.with_new_scopes(|this| hir::ConstBlock {
+                    let c = self.with_new_scopes(c.value.span, |this| hir::ConstBlock {
                         def_id: this.local_def_id(c.id),
                         hir_id: this.lower_node_id(c.id),
                         body: this.lower_const_body(c.value.span, Some(&c.value)),
@@ -189,7 +189,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     None,
                     e.span,
                     hir::CoroutineSource::Block,
-                    |this| this.with_new_scopes(|this| this.lower_block_expr(block)),
+                    |this| this.with_new_scopes(e.span, |this| this.lower_block_expr(block)),
                 ),
                 ExprKind::Await(expr, await_kw_span) => self.lower_expr_await(*await_kw_span, expr),
                 ExprKind::Closure(box Closure {
@@ -323,7 +323,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     None,
                     e.span,
                     hir::CoroutineSource::Block,
-                    |this| this.with_new_scopes(|this| this.lower_block_expr(block)),
+                    |this| this.with_new_scopes(e.span, |this| this.lower_block_expr(block)),
                 ),
                 ExprKind::Yield(opt_expr) => self.lower_expr_yield(e.span, opt_expr.as_deref()),
                 ExprKind::Err => hir::ExprKind::Err(
@@ -350,30 +350,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
         }
     }
 
-    fn lower_binop(&mut self, b: BinOp) -> hir::BinOp {
-        Spanned {
-            node: match b.node {
-                BinOpKind::Add => hir::BinOpKind::Add,
-                BinOpKind::Sub => hir::BinOpKind::Sub,
-                BinOpKind::Mul => hir::BinOpKind::Mul,
-                BinOpKind::Div => hir::BinOpKind::Div,
-                BinOpKind::Rem => hir::BinOpKind::Rem,
-                BinOpKind::And => hir::BinOpKind::And,
-                BinOpKind::Or => hir::BinOpKind::Or,
-                BinOpKind::BitXor => hir::BinOpKind::BitXor,
-                BinOpKind::BitAnd => hir::BinOpKind::BitAnd,
-                BinOpKind::BitOr => hir::BinOpKind::BitOr,
-                BinOpKind::Shl => hir::BinOpKind::Shl,
-                BinOpKind::Shr => hir::BinOpKind::Shr,
-                BinOpKind::Eq => hir::BinOpKind::Eq,
-                BinOpKind::Lt => hir::BinOpKind::Lt,
-                BinOpKind::Le => hir::BinOpKind::Le,
-                BinOpKind::Ne => hir::BinOpKind::Ne,
-                BinOpKind::Ge => hir::BinOpKind::Ge,
-                BinOpKind::Gt => hir::BinOpKind::Gt,
-            },
-            span: self.lower_span(b.span),
-        }
+    fn lower_binop(&mut self, b: BinOp) -> BinOp {
+        Spanned { node: b.node, span: self.lower_span(b.span) }
     }
 
     fn lower_legacy_const_generics(
@@ -395,7 +373,13 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 let node_id = self.next_node_id();
 
                 // Add a definition for the in-band const def.
-                self.create_def(parent_def_id.def_id, node_id, DefPathData::AnonConst, f.span);
+                self.create_def(
+                    parent_def_id.def_id,
+                    node_id,
+                    DefPathData::AnonConst,
+                    DefKind::AnonConst,
+                    f.span,
+                );
 
                 let anon_const = AnonConst { id: node_id, value: arg };
                 generic_args.push(AngleBracketedArg::Arg(GenericArg::Const(anon_const)));
@@ -524,15 +508,15 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     this.mark_span_with_reason(
                         DesugaringKind::TryBlock,
                         expr.span,
-                        this.allow_try_trait.clone(),
+                        Some(this.allow_try_trait.clone()),
                     ),
                     expr,
                 )
             } else {
                 let try_span = this.mark_span_with_reason(
                     DesugaringKind::TryBlock,
                     this.tcx.sess.source_map().end_point(body.span),
-                    this.allow_try_trait.clone(),
+                    Some(this.allow_try_trait.clone()),
                 );
 
                 (try_span, this.expr_unit(try_span))
@@ -612,8 +596,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let output = ret_ty.unwrap_or_else(|| hir::FnRetTy::DefaultReturn(self.lower_span(span)));
 
         // Resume argument type: `ResumeTy`
-        let unstable_span =
-            self.mark_span_with_reason(DesugaringKind::Async, span, self.allow_gen_future.clone());
+        let unstable_span = self.mark_span_with_reason(
+            DesugaringKind::Async,
+            span,
+            Some(self.allow_gen_future.clone()),
+        );
         let resume_ty = hir::QPath::LangItem(hir::LangItem::ResumeTy, unstable_span);
         let input_ty = hir::Ty {
             hir_id: self.next_id(),
@@ -735,7 +722,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
             let unstable_span = self.mark_span_with_reason(
                 DesugaringKind::Async,
                 span,
-                self.allow_gen_future.clone(),
+                Some(self.allow_gen_future.clone()),
             );
             self.lower_attrs(
                 inner_hir_id,
@@ -772,17 +759,17 @@ impl<'hir> LoweringContext<'_, 'hir> {
         match self.coroutine_kind {
             Some(hir::CoroutineKind::Async(_)) => {}
             Some(hir::CoroutineKind::Coroutine) | Some(hir::CoroutineKind::Gen(_)) | None => {
-                self.tcx.sess.emit_err(AwaitOnlyInAsyncFnAndBlocks {
+                return hir::ExprKind::Err(self.tcx.sess.emit_err(AwaitOnlyInAsyncFnAndBlocks {
                     await_kw_span,
                     item_span: self.current_item,
-                });
+                }));
             }
         }
         let span = self.mark_span_with_reason(DesugaringKind::Await, await_kw_span, None);
         let gen_future_span = self.mark_span_with_reason(
             DesugaringKind::Await,
             full_span,
-            self.allow_gen_future.clone(),
+            Some(self.allow_gen_future.clone()),
         );
         let expr = self.lower_expr_mut(expr);
         let expr_hir_id = expr.hir_id;
@@ -935,9 +922,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
     ) -> hir::ExprKind<'hir> {
         let (binder_clause, generic_params) = self.lower_closure_binder(binder);
 
-        let (body_id, coroutine_option) = self.with_new_scopes(move |this| {
-            let prev = this.current_item;
-            this.current_item = Some(fn_decl_span);
+        let (body_id, coroutine_option) = self.with_new_scopes(fn_decl_span, move |this| {
             let mut coroutine_kind = None;
             let body_id = this.lower_fn_body(decl, |this| {
                 let e = this.lower_expr_mut(body);
@@ -946,7 +931,6 @@ impl<'hir> LoweringContext<'_, 'hir> {
             });
             let coroutine_option =
                 this.coroutine_movability_for_fn(decl, fn_decl_span, coroutine_kind, movability);
-            this.current_item = prev;
             (body_id, coroutine_option)
         });
 
@@ -1032,7 +1016,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let outer_decl =
             FnDecl { inputs: decl.inputs.clone(), output: FnRetTy::Default(fn_decl_span) };
 
-        let body = self.with_new_scopes(|this| {
+        let body = self.with_new_scopes(fn_decl_span, |this| {
             // FIXME(cramertj): allow `async` non-`move` closures with arguments.
             if capture_clause == CaptureBy::Ref && !decl.inputs.is_empty() {
                 this.tcx.sess.emit_err(AsyncNonMoveClosureNotSupported { fn_decl_span });
@@ -1054,7 +1038,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     async_ret_ty,
                     body.span,
                     hir::CoroutineSource::Closure,
-                    |this| this.with_new_scopes(|this| this.lower_expr_mut(body)),
+                    |this| this.with_new_scopes(fn_decl_span, |this| this.lower_expr_mut(body)),
                 );
                 let hir_id = this.lower_node_id(inner_closure_id);
                 this.maybe_forward_track_caller(body.span, closure_hir_id, hir_id);
@@ -1494,7 +1478,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
         match self.coroutine_kind {
             Some(hir::CoroutineKind::Gen(_)) => {}
             Some(hir::CoroutineKind::Async(_)) => {
-                self.tcx.sess.emit_err(AsyncCoroutinesNotSupported { span });
+                return hir::ExprKind::Err(
+                    self.tcx.sess.emit_err(AsyncCoroutinesNotSupported { span }),
+                );
             }
             Some(hir::CoroutineKind::Coroutine) | None => {
                 if !self.tcx.features().coroutines {
@@ -1640,13 +1626,13 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let unstable_span = self.mark_span_with_reason(
             DesugaringKind::QuestionMark,
             span,
-            self.allow_try_trait.clone(),
+            Some(self.allow_try_trait.clone()),
         );
         let try_span = self.tcx.sess.source_map().end_point(span);
         let try_span = self.mark_span_with_reason(
             DesugaringKind::QuestionMark,
             try_span,
-            self.allow_try_trait.clone(),
+            Some(self.allow_try_trait.clone()),
         );
 
         // `Try::branch(<expr>)`
@@ -1739,7 +1725,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let unstable_span = self.mark_span_with_reason(
             DesugaringKind::YeetExpr,
             span,
-            self.allow_try_trait.clone(),
+            Some(self.allow_try_trait.clone()),
         );
 
         let from_yeet_expr = self.wrap_in_try_constructor(

compiler/rustc_ast_lowering/src/index.rs

@@ -10,7 +10,7 @@ use rustc_middle::ty::TyCtxt;
 use rustc_span::{Span, DUMMY_SP};
 
 /// A visitor that walks over the HIR and collects `Node`s into a HIR map.
-pub(super) struct NodeCollector<'a, 'hir> {
+struct NodeCollector<'a, 'hir> {
     tcx: TyCtxt<'hir>,
 
     bodies: &'a SortedMap<ItemLocalId, &'hir Body<'hir>>,