rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Rollup merge of #106223 - estebank:suggest-let-ty-borrow, r=compiler-errors

Browse Source 
On unsized locals with explicit types suggest `&`

Fix #72742.
This commit is contained in:
Matthias Krüger
2022-12-29 13:16:04 +01:00
committed by GitHub
parent c610aeb592 083eb936ec
commit 313541c766
5 changed files with 96 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
View File

@@ -2514,6 +2514,15 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
ObligationCauseCode::VariableType(hir_id) => {
let parent_node = self.tcx.hir().get_parent_node(hir_id);
match self.tcx.hir().find(parent_node) {
Some(Node::Local(hir::Local { ty: Some(ty), .. })) => {
err.span_suggestion_verbose(
ty.span.shrink_to_lo(),
"consider borrowing here",
"&",
Applicability::MachineApplicable,
);
err.note("all local variables must have a statically known size");
}
Some(Node::Local(hir::Local {
init: Some(hir::Expr { kind: hir::ExprKind::Index(_, _), span, .. }),
..