Auto merge of rust-lang#107811 - matthiaskrgr:rollup-rpjzshk, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#105641 (Implement cursors for BTreeMap)
 - rust-lang#107271 (Treat Drop as a rmw operation)
 - rust-lang#107710 (Update strip-ansi-escapes and vte)
 - rust-lang#107758 (Change `arena_cache` to not alter the declared query result)
 - rust-lang#107777 (Make `derive_const` derive properly const-if-const impls)
 - rust-lang#107780 (Rename `replace_bound_vars_with_*` to `instantiate_binder_with_*`)
 - rust-lang#107793 (Add missing tracking issue for `RawOsError`)
 - rust-lang#107807 (Fix small debug typo)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -127,6 +127,12 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f8cb5d814eb646a863c4f24978cff2880c4be96ad8cde2c0f0678732902e271"
 
+[[package]]
+name = "arrayvec"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
+
 [[package]]
 name = "arrayvec"
 version = "0.7.0"
@@ -791,7 +797,7 @@ dependencies = [
 name = "clippy_utils"
 version = "0.1.69"
 dependencies = [
- "arrayvec",
+ "arrayvec 0.7.0",
  "if_chain",
  "itertools",
  "rustc-semver",
@@ -3912,7 +3918,7 @@ dependencies = [
 name = "rustc_data_structures"
 version = "0.0.0"
 dependencies = [
- "arrayvec",
+ "arrayvec 0.7.0",
  "bitflags",
  "cfg-if",
  "ena",
@@ -4169,7 +4175,7 @@ dependencies = [
 name = "rustc_index"
 version = "0.0.0"
 dependencies = [
- "arrayvec",
+ "arrayvec 0.7.0",
  "rustc_macros",
  "rustc_serialize",
  "smallvec",
@@ -4866,7 +4872,7 @@ dependencies = [
 name = "rustdoc"
 version = "0.0.0"
 dependencies = [
- "arrayvec",
+ "arrayvec 0.7.0",
  "askama",
  "expect-test",
  "itertools",
@@ -5375,9 +5381,9 @@ dependencies = [
 
 [[package]]
 name = "strip-ansi-escapes"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d63676e2abafa709460982ddc02a3bb586b6d15a49b75c212e06edd3933acee"
+checksum = "011cbb39cf7c1f62871aea3cc46e5817b0937b49e9447370c93cacbe93a766d8"
 dependencies = [
  "vte",
 ]
@@ -6089,9 +6095,9 @@ checksum = "05e42f7c18b8f902290b009cde6d651262f956c98bc51bca4cd1d511c9cd85c7"
 
 [[package]]
 name = "utf8parse"
-version = "0.1.1"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8772a4ccbb4e89959023bc5b7cb8623a795caa7092d99f3aa9501b9484d4557d"
+checksum = "936e4b492acfd135421d8dca4b1aa80a7bfc26e702ef3af710e0752684df5372"
 
 [[package]]
 name = "uuid"
@@ -6122,11 +6128,23 @@ checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "vte"
-version = "0.3.3"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f42f536e22f7fcbb407639765c8fd78707a33109301f834a594758bedd6e8cf"
+checksum = "6cbce692ab4ca2f1f3047fcf732430249c0e971bfdd2b234cf2c47ad93af5983"
 dependencies = [
+ "arrayvec 0.5.2",
  "utf8parse",
+ "vte_generate_state_changes",
+]
+
+[[package]]
+name = "vte_generate_state_changes"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d257817081c7dffcdbab24b9e62d2def62e2ff7d00b1c20062551e6cccc145ff"
+dependencies = [
+ "proc-macro2",
+ "quote",
 ]
 
 [[package]]

compiler/rustc_ast_pretty/src/pprust/state.rs

@@ -1567,8 +1567,18 @@ impl<'a> State<'a> {
 
             match bound {
                 GenericBound::Trait(tref, modifier) => {
-                    if modifier == &TraitBoundModifier::Maybe {
-                        self.word("?");
+                    match modifier {
+                        TraitBoundModifier::None => {}
+                        TraitBoundModifier::Maybe => {
+                            self.word("?");
+                        }
+                        TraitBoundModifier::MaybeConst => {
+                            self.word_space("~const");
+                        }
+                        TraitBoundModifier::MaybeConstMaybe => {
+                            self.word_space("~const");
+                            self.word("?");
+                        }
                     }
                     self.print_poly_trait_ref(tref);
                 }

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -1139,7 +1139,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         if let ty::Adt(def, substs) = ty.kind()
                             && Some(def.did()) == tcx.lang_items().pin_type()
                             && let ty::Ref(_, _, hir::Mutability::Mut) = substs.type_at(0).kind()
-                            && let self_ty = infcx.replace_bound_vars_with_fresh_vars(
+                            && let self_ty = infcx.instantiate_binder_with_fresh_vars(
                                 fn_call_span,
                                 LateBoundRegionConversionTime::FnCall,
                                 tcx.fn_sig(method_did).subst(tcx, method_substs).input(0),

compiler/rustc_borrowck/src/type_check/input_output.rs

@@ -38,7 +38,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         // so that they represent the view from "inside" the closure.
         let user_provided_sig = self
             .instantiate_canonical_with_fresh_inference_vars(body.span, &user_provided_poly_sig);
-        let user_provided_sig = self.infcx.replace_bound_vars_with_fresh_vars(
+        let user_provided_sig = self.infcx.instantiate_binder_with_fresh_vars(
             body.span,
             LateBoundRegionConversionTime::FnCall,
             user_provided_sig,

compiler/rustc_builtin_macros/src/deriving/debug.rs

@@ -153,7 +153,10 @@ fn show_substructure(cx: &mut ExtCtxt<'_>, span: Span, substr: &Substructure<'_>
         let path_debug = cx.path_global(span, cx.std_path(&[sym::fmt, sym::Debug]));
         let ty_dyn_debug = cx.ty(
             span,
-            ast::TyKind::TraitObject(vec![cx.trait_bound(path_debug)], ast::TraitObjectSyntax::Dyn),
+            ast::TyKind::TraitObject(
+                vec![cx.trait_bound(path_debug, false)],
+                ast::TraitObjectSyntax::Dyn,
+            ),
         );
         let ty_slice = cx.ty(
             span,

compiler/rustc_builtin_macros/src/deriving/generic/mod.rs

@@ -605,18 +605,26 @@ impl<'a> TraitDef<'a> {
                     let bounds: Vec<_> = self
                         .additional_bounds
                         .iter()
-                        .map(|p| cx.trait_bound(p.to_path(cx, self.span, type_ident, generics)))
+                        .map(|p| {
+                            cx.trait_bound(
+                                p.to_path(cx, self.span, type_ident, generics),
+                                self.is_const,
+                            )
+                        })
                         .chain(
                             // Add a bound for the current trait.
                             self.skip_path_as_bound
                                 .not()
-                                .then(|| cx.trait_bound(trait_path.clone())),
+                                .then(|| cx.trait_bound(trait_path.clone(), self.is_const)),
                         )
                         .chain({
                             // Add a `Copy` bound if required.
                             if is_packed && self.needs_copy_as_bound_if_packed {
                                 let p = deriving::path_std!(marker::Copy);
-                                Some(cx.trait_bound(p.to_path(cx, self.span, type_ident, generics)))
+                                Some(cx.trait_bound(
+                                    p.to_path(cx, self.span, type_ident, generics),
+                                    self.is_const,
+                                ))
                             } else {
                                 None
                             }
@@ -694,18 +702,24 @@ impl<'a> TraitDef<'a> {
                         let mut bounds: Vec<_> = self
                             .additional_bounds
                             .iter()
-                            .map(|p| cx.trait_bound(p.to_path(cx, self.span, type_ident, generics)))
+                            .map(|p| {
+                                cx.trait_bound(
+                                    p.to_path(cx, self.span, type_ident, generics),
+                                    self.is_const,
+                                )
+                            })
                             .collect();
 
                         // Require the current trait.
-                        bounds.push(cx.trait_bound(trait_path.clone()));
+                        bounds.push(cx.trait_bound(trait_path.clone(), self.is_const));
 
                         // Add a `Copy` bound if required.
                         if is_packed && self.needs_copy_as_bound_if_packed {
                             let p = deriving::path_std!(marker::Copy);
-                            bounds.push(
-                                cx.trait_bound(p.to_path(cx, self.span, type_ident, generics)),
-                            );
+                            bounds.push(cx.trait_bound(
+                                p.to_path(cx, self.span, type_ident, generics),
+                                self.is_const,
+                            ));
                         }
 
                         let predicate = ast::WhereBoundPredicate {

compiler/rustc_builtin_macros/src/deriving/generic/ty.rs

@@ -154,7 +154,7 @@ fn mk_ty_param(
         .iter()
         .map(|b| {
             let path = b.to_path(cx, span, self_ident, self_generics);
-            cx.trait_bound(path)
+            cx.trait_bound(path, false)
         })
         .collect();
     cx.typaram(span, Ident::new(name, span), bounds, None)

compiler/rustc_expand/src/build.rs

@@ -131,10 +131,14 @@ impl<'a> ExtCtxt<'a> {
         }
     }
 
-    pub fn trait_bound(&self, path: ast::Path) -> ast::GenericBound {
+    pub fn trait_bound(&self, path: ast::Path, is_const: bool) -> ast::GenericBound {
         ast::GenericBound::Trait(
             self.poly_trait_ref(path.span, path),
-            ast::TraitBoundModifier::None,
+            if is_const {
+                ast::TraitBoundModifier::MaybeConst
+            } else {
+                ast::TraitBoundModifier::None
+            },
         )
     }
 

compiler/rustc_hir_analysis/src/check/compare_impl_item.rs

@@ -246,7 +246,7 @@ fn compare_method_predicate_entailment<'tcx>(
 
     let mut wf_tys = FxIndexSet::default();
 
-    let unnormalized_impl_sig = infcx.replace_bound_vars_with_fresh_vars(
+    let unnormalized_impl_sig = infcx.instantiate_binder_with_fresh_vars(
         impl_m_span,
         infer::HigherRankedType,
         tcx.fn_sig(impl_m.def_id).subst_identity(),
@@ -640,7 +640,7 @@ pub(super) fn collect_return_position_impl_trait_in_trait_tys<'tcx>(
     let impl_sig = ocx.normalize(
         &norm_cause,
         param_env,
-        infcx.replace_bound_vars_with_fresh_vars(
+        infcx.instantiate_binder_with_fresh_vars(
             return_span,
             infer::HigherRankedType,
             tcx.fn_sig(impl_m.def_id).subst_identity(),

compiler/rustc_hir_typeck/src/callee.rs

@@ -156,7 +156,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 // fnmut vs fnonce. If so, we have to defer further processing.
                 if self.closure_kind(substs).is_none() {
                     let closure_sig = substs.as_closure().sig();
-                    let closure_sig = self.replace_bound_vars_with_fresh_vars(
+                    let closure_sig = self.instantiate_binder_with_fresh_vars(
                         call_expr.span,
                         infer::FnCall,
                         closure_sig,
@@ -437,7 +437,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         // renormalize the associated types at this point, since they
         // previously appeared within a `Binder<>` and hence would not
         // have been normalized before.
-        let fn_sig = self.replace_bound_vars_with_fresh_vars(call_expr.span, infer::FnCall, fn_sig);
+        let fn_sig = self.instantiate_binder_with_fresh_vars(call_expr.span, infer::FnCall, fn_sig);
         let fn_sig = self.normalize(call_expr.span, fn_sig);
 
         // Call the generic checker.