Port "BorrowedTooLong" diagnostic

compiler/rustc_infer/src/errors/mod.rs

@@ -970,3 +970,13 @@ pub struct LfBoundNotSatisfied<'a> {
     #[subdiagnostic]
     pub notes: Vec<note_and_explain::RegionExplanation<'a>>,
 }
+
+#[derive(Diagnostic)]
+#[diag(infer_borrowed_too_long, code = "E0490")]
+pub struct BorrowedTooLong<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub ty: Ty<'a>,
+    #[subdiagnostic]
+    pub notes: Vec<note_and_explain::RegionExplanation<'a>>,
+}

compiler/rustc_infer/src/errors/note_and_explain.rs

@@ -123,12 +123,14 @@ pub enum PrefixKind {
     Empty,
     RefValidFor,
     ContentValidFor,
-    TypeValidFor,
+    TypeObjValidFor,
     SourcePointerValidFor,
     TypeSatisfy,
     TypeOutlive,
     LfInstantiatedWith,
     LfMustOutlive,
+    TypeValidFor,
+    BorrowLastsFor,
 }
 
 pub enum SuffixKind {
@@ -143,12 +145,14 @@ impl IntoDiagnosticArg for PrefixKind {
             Self::Empty => "empty",
             Self::RefValidFor => "ref_valid_for",
             Self::ContentValidFor => "content_valid_for",
-            Self::TypeValidFor => "type_valid_for",
+            Self::TypeObjValidFor => "type_obj_valid_for",
             Self::SourcePointerValidFor => "source_pointer_valid_for",
             Self::TypeSatisfy => "type_satisfy",
             Self::TypeOutlive => "type_outlive",
             Self::LfInstantiatedWith => "lf_instantiated_with",
             Self::LfMustOutlive => "lf_must_outlive",
+            Self::TypeValidFor => "type_valid_for",
+            Self::BorrowLastsFor => "borrow_lasts_for",
         }
         .into();
         rustc_errors::DiagnosticArgValue::Str(kind)

compiler/rustc_infer/src/infer/error_reporting/note.rs

@@ -1,6 +1,6 @@
 use crate::errors::{
-    note_and_explain, FullfillReqLifetime, LfBoundNotSatisfied, OutlivesBound, OutlivesContent,
-    RegionOriginNote,
+    note_and_explain, BorrowedTooLong, FullfillReqLifetime, LfBoundNotSatisfied, OutlivesBound,
+    OutlivesContent, RegionOriginNote,
 };
 use crate::infer::error_reporting::{note_and_explain_region, TypeErrCtxt};
 use crate::infer::{self, SubregionOrigin};
@@ -147,7 +147,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                     self.tcx,
                     sub,
                     None,
-                    note_and_explain::PrefixKind::TypeValidFor,
+                    note_and_explain::PrefixKind::TypeObjValidFor,
                     note_and_explain::SuffixKind::Empty,
                 );
                 let pointer_valid = note_and_explain::RegionExplanation::new(
@@ -200,6 +200,28 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                 }
                 .into_diagnostic(&self.tcx.sess.parse_sess.span_diagnostic)
             }
+            infer::DataBorrowed(ty, span) => {
+                let type_valid = note_and_explain::RegionExplanation::new(
+                    self.tcx,
+                    sub,
+                    None,
+                    note_and_explain::PrefixKind::TypeValidFor,
+                    note_and_explain::SuffixKind::Empty,
+                );
+                let borrow_lasts_for = note_and_explain::RegionExplanation::new(
+                    self.tcx,
+                    sup,
+                    None,
+                    note_and_explain::PrefixKind::BorrowLastsFor,
+                    note_and_explain::SuffixKind::Empty,
+                );
+                BorrowedTooLong {
+                    span,
+                    ty: self.resolve_vars_if_possible(ty),
+                    notes: type_valid.into_iter().chain(borrow_lasts_for).collect(),
+                }
+                .into_diagnostic(&self.tcx.sess.parse_sess.span_diagnostic)
+            }
             infer::ReferenceOutlivesReferent(ty, span) => {
                 let mut err = struct_span_err!(
                     self.tcx.sess,