Rollup of 11 pull requests

compiler/rustc_ast_lowering/src/lib.rs

@@ -418,10 +418,10 @@ fn compute_hir_hash(
 pub fn lower_to_hir(tcx: TyCtxt<'_>, (): ()) -> hir::Crate<'_> {
     let sess = tcx.sess;
     // Queries that borrow `resolver_for_lowering`.
-    tcx.ensure_with_value().output_filenames(());
-    tcx.ensure_with_value().early_lint_checks(());
-    tcx.ensure_with_value().debugger_visualizers(LOCAL_CRATE);
-    tcx.ensure_with_value().get_lang_items(());
+    tcx.ensure_done().output_filenames(());
+    tcx.ensure_done().early_lint_checks(());
+    tcx.ensure_done().debugger_visualizers(LOCAL_CRATE);
+    tcx.ensure_done().get_lang_items(());
     let (mut resolver, krate) = tcx.resolver_for_lowering().steal();
 
     let ast_index = index_crate(&resolver.node_id_to_def_id, &krate);

compiler/rustc_borrowck/messages.ftl

@@ -92,9 +92,6 @@ borrowck_lifetime_constraints_error =
 borrowck_limitations_implies_static =
     due to current limitations in the borrow checker, this implies a `'static` lifetime
 
-borrowck_long_type_consider_verbose = consider using `--verbose` to print the full type name to the console
-borrowck_long_type_full_path = the full type name has been written to '{$path}'
-
 borrowck_move_closure_suggestion =
     consider adding 'move' keyword before the nested closure
 

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -289,8 +289,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                 None => "value".to_owned(),
             };
             if needs_note {
-                let mut path = None;
-                let ty = self.infcx.tcx.short_ty_string(ty, &mut path);
+                let ty = self.infcx.tcx.short_string(ty, err.long_ty_path());
                 if let Some(local) = place.as_local() {
                     let span = self.body.local_decls[local].source_info.span;
                     err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
@@ -306,11 +305,6 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                         place: &note_msg,
                     });
                 };
-                if let Some(path) = path {
-                    err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                        path: path.display().to_string(),
-                    });
-                }
             }
 
             if let UseSpans::FnSelfUse {

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -4,7 +4,7 @@ use std::collections::BTreeMap;
 
 use rustc_abi::{FieldIdx, VariantIdx};
 use rustc_data_structures::fx::FxIndexMap;
-use rustc_errors::{Applicability, Diag, EmissionGuarantee, MultiSpan};
+use rustc_errors::{Applicability, Diag, EmissionGuarantee, MultiSpan, listify};
 use rustc_hir::def::{CtorKind, Namespace};
 use rustc_hir::{self as hir, CoroutineKind, LangItem};
 use rustc_index::IndexSlice;
@@ -29,7 +29,7 @@ use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
 use rustc_trait_selection::error_reporting::traits::call_kind::{CallDesugaringKind, call_kind};
 use rustc_trait_selection::infer::InferCtxtExt;
 use rustc_trait_selection::traits::{
-    FulfillmentErrorCode, type_known_to_meet_bound_modulo_regions,
+    FulfillmentError, FulfillmentErrorCode, type_known_to_meet_bound_modulo_regions,
 };
 use tracing::debug;
 
@@ -1433,17 +1433,15 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                                             error.obligation.predicate,
                                         )
                                     }
-                                    [errors @ .., last] => {
+                                    _ => {
                                         format!(
                                             "you could `clone` the value and consume it, if the \
-                                             following trait bounds could be satisfied: \
-                                             {} and `{}`",
-                                            errors
-                                                .iter()
-                                                .map(|e| format!("`{}`", e.obligation.predicate))
-                                                .collect::<Vec<_>>()
-                                                .join(", "),
-                                            last.obligation.predicate,
+                                             following trait bounds could be satisfied: {}",
+                                            listify(&errors, |e: &FulfillmentError<'tcx>| format!(
+                                                "`{}`",
+                                                e.obligation.predicate
+                                            ))
+                                            .unwrap(),
                                         )
                                     }
                                 };

compiler/rustc_borrowck/src/diagnostics/move_errors.rs

@@ -596,19 +596,13 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                         self.suggest_cloning(err, place_ty, expr, None);
                     }
 
-                    let mut path = None;
-                    let ty = self.infcx.tcx.short_ty_string(place_ty, &mut path);
+                    let ty = self.infcx.tcx.short_string(place_ty, err.long_ty_path());
                     err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
                         is_partial_move: false,
                         ty,
                         place: &place_desc,
                         span,
                     });
-                    if let Some(path) = path {
-                        err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                            path: path.display().to_string(),
-                        });
-                    }
                 } else {
                     binds_to.sort();
                     binds_to.dedup();
@@ -635,19 +629,13 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                     self.suggest_cloning(err, place_ty, expr, Some(use_spans));
                 }
 
-                let mut path = None;
-                let ty = self.infcx.tcx.short_ty_string(place_ty, &mut path);
+                let ty = self.infcx.tcx.short_string(place_ty, err.long_ty_path());
                 err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
                     is_partial_move: false,
                     ty,
                     place: &place_desc,
                     span: use_span,
                 });
-                if let Some(path) = path {
-                    err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                        path: path.display().to_string(),
-                    });
-                }
 
                 use_spans.args_subdiag(err, |args_span| {
                     crate::session_diagnostics::CaptureArgLabel::MoveOutPlace {
@@ -845,19 +833,13 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                     self.suggest_cloning(err, bind_to.ty, expr, None);
                 }
 
-                let mut path = None;
-                let ty = self.infcx.tcx.short_ty_string(bind_to.ty, &mut path);
+                let ty = self.infcx.tcx.short_string(bind_to.ty, err.long_ty_path());
                 err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
                     is_partial_move: false,
                     ty,
                     place: place_desc,
                     span: binding_span,
                 });
-                if let Some(path) = path {
-                    err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                        path: path.display().to_string(),
-                    });
-                }
             }
         }
 

compiler/rustc_borrowck/src/session_diagnostics.rs

@@ -458,13 +458,6 @@ pub(crate) enum OnClosureNote<'a> {
     },
 }
 
-#[derive(Subdiagnostic)]
-#[note(borrowck_long_type_full_path)]
-#[note(borrowck_long_type_consider_verbose)]
-pub(crate) struct LongTypePath {
-    pub(crate) path: String,
-}
-
 #[derive(Subdiagnostic)]
 pub(crate) enum TypeNoCopy<'a> {
     #[label(borrowck_ty_no_impl_copy)]

compiler/rustc_builtin_macros/src/format.rs

@@ -8,7 +8,9 @@ use rustc_ast::{
     token,
 };
 use rustc_data_structures::fx::FxHashSet;
-use rustc_errors::{Applicability, Diag, MultiSpan, PResult, SingleLabelManySpans};
+use rustc_errors::{
+    Applicability, Diag, MultiSpan, PResult, SingleLabelManySpans, listify, pluralize,
+};
 use rustc_expand::base::*;
 use rustc_lint_defs::builtin::NAMED_ARGUMENTS_USED_POSITIONALLY;
 use rustc_lint_defs::{BufferedEarlyLint, BuiltinLintDiag, LintId};
@@ -975,15 +977,11 @@ fn report_invalid_references(
         } else {
             MultiSpan::from_spans(invalid_refs.iter().filter_map(|&(_, span, _, _)| span).collect())
         };
-        let arg_list = if let &[index] = &indexes[..] {
-            format!("argument {index}")
-        } else {
-            let tail = indexes.pop().unwrap();
-            format!(
-                "arguments {head} and {tail}",
-                head = indexes.into_iter().map(|i| i.to_string()).collect::<Vec<_>>().join(", ")
-            )
-        };
+        let arg_list = format!(
+            "argument{} {}",
+            pluralize!(indexes.len()),
+            listify(&indexes, |i: &usize| i.to_string()).unwrap_or_default()
+        );
         e = ecx.dcx().struct_span_err(
             span,
             format!("invalid reference to positional {arg_list} ({num_args_desc})"),

compiler/rustc_codegen_cranelift/src/driver/aot.rs

@@ -692,7 +692,7 @@ pub(crate) fn run_aot(
 
     if tcx.dep_graph.is_fully_enabled() {
         for cgu in cgus {
-            tcx.ensure().codegen_unit(cgu.name());
+            tcx.ensure_ok().codegen_unit(cgu.name());
         }
     }
 

compiler/rustc_codegen_ssa/src/base.rs

@@ -634,7 +634,7 @@ pub fn codegen_crate<B: ExtraBackendMethods>(
     // unnecessarily.
     if tcx.dep_graph.is_fully_enabled() {
         for cgu in codegen_units {
-            tcx.ensure().codegen_unit(cgu.name());
+            tcx.ensure_ok().codegen_unit(cgu.name());
         }
     }
 

compiler/rustc_driver_impl/src/lib.rs

@@ -317,7 +317,7 @@ pub fn run_compiler(at_args: &[String], callbacks: &mut (dyn Callbacks + Send))
         if let Some(pp_mode) = sess.opts.pretty {
             if pp_mode.needs_ast_map() {
                 create_and_enter_global_ctxt(compiler, krate, |tcx| {
-                    tcx.ensure().early_lint_checks(());
+                    tcx.ensure_ok().early_lint_checks(());
                     pretty::print(sess, pp_mode, pretty::PrintExtra::NeedsAstMap { tcx });
                     passes::write_dep_info(tcx);
                 });
@@ -365,7 +365,7 @@ pub fn run_compiler(at_args: &[String], callbacks: &mut (dyn Callbacks + Send))
                 return early_exit();
             }
 
-            tcx.ensure().analysis(());
+            tcx.ensure_ok().analysis(());
 
             if callbacks.after_analysis(compiler, tcx) == Compilation::Stop {
                 return early_exit();

compiler/rustc_driver_impl/src/pretty.rs

@@ -222,7 +222,7 @@ impl<'tcx> PrintExtra<'tcx> {
 
 pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
     if ppm.needs_analysis() {
-        ex.tcx().ensure().analysis(());
+        ex.tcx().ensure_ok().analysis(());
     }
 
     let (src, src_name) = get_source(sess);

compiler/rustc_errors/src/diagnostic.rs

@@ -4,6 +4,7 @@ use std::hash::{Hash, Hasher};
 use std::marker::PhantomData;
 use std::ops::{Deref, DerefMut};
 use std::panic;
+use std::path::PathBuf;
 use std::thread::panicking;
 
 use rustc_data_structures::fx::FxIndexMap;
@@ -301,6 +302,7 @@ pub struct DiagInner {
 
     pub is_lint: Option<IsLint>,
 
+    pub long_ty_path: Option<PathBuf>,
     /// With `-Ztrack_diagnostics` enabled,
     /// we print where in rustc this error was emitted.
     pub(crate) emitted_at: DiagLocation,
@@ -324,6 +326,7 @@ impl DiagInner {
             args: Default::default(),
             sort_span: DUMMY_SP,
             is_lint: None,
+            long_ty_path: None,
             emitted_at: DiagLocation::caller(),
         }
     }
@@ -1293,9 +1296,37 @@ impl<'a, G: EmissionGuarantee> Diag<'a, G> {
     /// `cancel`, etc. Afterwards, `drop` is the only code that will be run on
     /// `self`.
     fn take_diag(&mut self) -> DiagInner {
+        if let Some(path) = &self.long_ty_path {
+            self.note(format!(
+                "the full name for the type has been written to '{}'",
+                path.display()
+            ));
+            self.note("consider using `--verbose` to print the full type name to the console");
+        }
         Box::into_inner(self.diag.take().unwrap())
     }
 
+    /// This method allows us to access the path of the file where "long types" are written to.
+    ///
+    /// When calling `Diag::emit`, as part of that we will check if a `long_ty_path` has been set,
+    /// and if it has been then we add a note mentioning the file where the "long types" were
+    /// written to.
+    ///
+    /// When calling `tcx.short_string()` after a `Diag` is constructed, the preferred way of doing
+    /// so is `tcx.short_string(ty, diag.long_ty_path())`. The diagnostic itself is the one that
+    /// keeps the existence of a "long type" anywhere in the diagnostic, so the note telling the
+    /// user where we wrote the file to is only printed once at most, *and* it makes it much harder
+    /// to forget to set it.
+    ///
+    /// If the diagnostic hasn't been created before a "short ty string" is created, then you should
+    /// ensure that this method is called to set it `*diag.long_ty_path() = path`.
+    ///
+    /// As a rule of thumb, if you see or add at least one `tcx.short_string()` call anywhere, in a
+    /// scope, `diag.long_ty_path()` should be called once somewhere close by.
+    pub fn long_ty_path(&mut self) -> &mut Option<PathBuf> {
+        &mut self.long_ty_path
+    }
+
     /// Most `emit_producing_guarantee` functions use this as a starting point.
     fn emit_producing_nothing(mut self) {
         let diag = self.take_diag();

compiler/rustc_errors/src/lib.rs

@@ -65,7 +65,7 @@ pub use rustc_error_messages::{
     SubdiagMessage, fallback_fluent_bundle, fluent_bundle,
 };
 use rustc_lint_defs::LintExpectationId;
-pub use rustc_lint_defs::{Applicability, pluralize};
+pub use rustc_lint_defs::{Applicability, listify, pluralize};
 use rustc_macros::{Decodable, Encodable};
 pub use rustc_span::ErrorGuaranteed;
 pub use rustc_span::fatal_error::{FatalError, FatalErrorMarker};
@@ -1999,18 +1999,6 @@ pub fn a_or_an(s: &str) -> &'static str {
     }
 }
 
-/// Grammatical tool for displaying messages to end users in a nice form.
-///
-/// Take a list ["a", "b", "c"] and output a display friendly version "a, b and c"
-pub fn display_list_with_comma_and<T: std::fmt::Display>(v: &[T]) -> String {
-    match v {
-        [] => "".to_string(),
-        [a] => a.to_string(),
-        [a, b] => format!("{a} and {b}"),
-        [a, v @ ..] => format!("{a}, {}", display_list_with_comma_and(v)),
-    }
-}
-
 #[derive(Clone, Copy, PartialEq, Hash, Debug)]
 pub enum TerminalUrl {
     No,

compiler/rustc_hir_analysis/src/check/check.rs

@@ -778,13 +778,13 @@ fn check_static_linkage(tcx: TyCtxt<'_>, def_id: LocalDefId) {
 pub(crate) fn check_item_type(tcx: TyCtxt<'_>, def_id: LocalDefId) {
     match tcx.def_kind(def_id) {
         DefKind::Static { .. } => {
-            tcx.ensure().typeck(def_id);
+            tcx.ensure_ok().typeck(def_id);
             maybe_check_static_with_link_section(tcx, def_id);
             check_static_inhabited(tcx, def_id);
             check_static_linkage(tcx, def_id);
         }
         DefKind::Const => {
-            tcx.ensure().typeck(def_id);
+            tcx.ensure_ok().typeck(def_id);
         }
         DefKind::Enum => {
             check_enum(tcx, def_id);
@@ -804,7 +804,7 @@ pub(crate) fn check_item_type(tcx: TyCtxt<'_>, def_id: LocalDefId) {
         DefKind::Impl { of_trait } => {
             if of_trait && let Some(impl_trait_header) = tcx.impl_trait_header(def_id) {
                 if tcx
-                    .ensure()
+                    .ensure_ok()
                     .coherent_trait(impl_trait_header.trait_ref.instantiate_identity().def_id)
                     .is_ok()
                 {
@@ -1042,7 +1042,7 @@ fn check_impl_items_against_trait<'tcx>(
             continue;
         };
 
-        let res = tcx.ensure().compare_impl_item(impl_item.expect_local());
+        let res = tcx.ensure_ok().compare_impl_item(impl_item.expect_local());
 
         if res.is_ok() {
             match ty_impl_item.kind {
@@ -1488,7 +1488,7 @@ fn check_enum(tcx: TyCtxt<'_>, def_id: LocalDefId) {
 
     for v in def.variants() {
         if let ty::VariantDiscr::Explicit(discr_def_id) = v.discr {
-            tcx.ensure().typeck(discr_def_id.expect_local());
+            tcx.ensure_ok().typeck(discr_def_id.expect_local());
         }
     }
 

compiler/rustc_hir_analysis/src/check/compare_impl_item.rs

@@ -2034,7 +2034,7 @@ pub(super) fn check_type_bounds<'tcx>(
 ) -> Result<(), ErrorGuaranteed> {
     // Avoid bogus "type annotations needed `Foo: Bar`" errors on `impl Bar for Foo` in case
     // other `Foo` impls are incoherent.
-    tcx.ensure().coherent_trait(impl_trait_ref.def_id)?;
+    tcx.ensure_ok().coherent_trait(impl_trait_ref.def_id)?;
 
     let param_env = tcx.param_env(impl_ty.def_id);
     debug!(?param_env);