bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Only point out non-diverging arms for match suggestions

Browse source
This commit is contained in:
Michael Goulet 2024-02-15 14:34:42 +00:00
parent fa9f77ff35
commit c763f833d1
7 changed files with 69 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

13
compiler/rustc_infer/src/infer/error_reporting/mod.rs
View file

@ -777,7 +777,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
prior_arm_span,
prior_arm_ty,
source,
ref prior_arms,
ref prior_non_diverging_arms,
opt_suggest_box_span,
scrut_span,
scrut_hir_id,
@ -817,12 +817,12 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
});
let source_map = self.tcx.sess.source_map();
let mut any_multiline_arm = source_map.is_multiline(arm_span);
if prior_arms.len() <= 4 {
for sp in prior_arms {
if prior_non_diverging_arms.len() <= 4 {
for sp in prior_non_diverging_arms {
any_multiline_arm |= source_map.is_multiline(*sp);
err.span_label(*sp, format!("this is found to be of type `{t}`"));
}
} else if let Some(sp) = prior_arms.last() {
} else if let Some(sp) = prior_non_diverging_arms.last() {
any_multiline_arm |= source_map.is_multiline(*sp);
err.span_label(
*sp,
@ -865,7 +865,10 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
self.suggest_boxing_for_return_impl_trait(
err,
ret_sp,
prior_arms.iter().chain(std::iter::once(&arm_span)).copied(),
prior_non_diverging_arms
.iter()
.chain(std::iter::once(&arm_span))
.copied(),
);
}
}

11
compiler/rustc_infer/src/infer/error_reporting/suggest.rs
View file

@ -203,10 +203,10 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
})
}
ObligationCauseCode::MatchExpressionArm(box MatchExpressionArmCause {
prior_arms,
prior_non_diverging_arms,
..
}) => {
if let [.., arm_span] = &prior_arms[..] {
if let [.., arm_span] = &prior_non_diverging_arms[..] {
Some(ConsiderAddingAwait::BothFuturesSugg {
first: arm_span.shrink_to_hi(),
second: exp_span.shrink_to_hi(),
@ -234,11 +234,14 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
Some(ConsiderAddingAwait::FutureSugg { span: then_span.shrink_to_hi() })
}
ObligationCauseCode::MatchExpressionArm(box MatchExpressionArmCause {
ref prior_arms,
ref prior_non_diverging_arms,
..
}) => Some({
ConsiderAddingAwait::FutureSuggMultiple {
spans: prior_arms.iter().map(|arm| arm.shrink_to_hi()).collect(),
spans: prior_non_diverging_arms
.iter()
.map(|arm| arm.shrink_to_hi())
.collect(),
}
}),
_ => None,