bjoernager/rust
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Suggest adding return if the type of unused semi return value can coerce to the fn return type

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This commit is contained in:
yukang 2023-08-20 00:56:22 +08:00
parent 4331c151b0
commit 25d38c48c3
7 changed files with 230 additions and 12 deletions
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8
compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
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@ -17,7 +17,7 @@ use crate::traits::{
use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
use rustc_errors::{
pluralize, struct_span_err, Applicability, Diagnostic, DiagnosticBuilder, ErrorGuaranteed,
MultiSpan, Style,
MultiSpan, StashKey, Style,
};
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Namespace, Res};
@ -2049,14 +2049,14 @@ impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
// begin with in those cases.
if self.tcx.lang_items().sized_trait() == Some(trait_ref.def_id()) {
if let None = self.tainted_by_errors() {
self.emit_inference_failure_err(
let err = self.emit_inference_failure_err(
obligation.cause.body_id,
span,
trait_ref.self_ty().skip_binder().into(),
ErrorCode::E0282,
false,
)
.emit();
);
err.stash(span, StashKey::MaybeForgetReturn);
}
return;
}