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Add unused_variables native diagnostic

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hkalbasi 2023-09-24 21:29:15 +03:30
parent e5e937ae5e
commit 7834b8fadb
12 changed files with 282 additions and 38 deletions
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15
crates/hir/src/lib.rs
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@ -98,7 +98,7 @@ pub use crate::{
ReplaceFilterMapNextWithFindMap, TypeMismatch, TypedHole, UndeclaredLabel,
UnimplementedBuiltinMacro, UnreachableLabel, UnresolvedExternCrate, UnresolvedField,
UnresolvedImport, UnresolvedMacroCall, UnresolvedMethodCall, UnresolvedModule,
UnresolvedProcMacro, UnusedMut,
UnresolvedProcMacro, UnusedMut, UnusedVariable,
},
has_source::HasSource,
semantics::{PathResolution, Semantics, SemanticsScope, TypeInfo, VisibleTraits},
@ -1697,9 +1697,20 @@ impl DefWithBody {
// Skip synthetic bindings
continue;
}
let need_mut = &mol[local];
let mut need_mut = &mol[local];
if body[binding_id].name.as_str() == Some("self")
&& need_mut == &mir::MutabilityReason::Unused
{
need_mut = &mir::MutabilityReason::Not;
}
let local = Local { parent: self.into(), binding_id };
match (need_mut, local.is_mut(db)) {
(mir::MutabilityReason::Unused, _) => {
let should_ignore = matches!(body[binding_id].name.as_str(), Some(it) if it.starts_with("_"));
if !should_ignore {
acc.push(UnusedVariable { local }.into())
}
}
(mir::MutabilityReason::Mut { .. }, true)
| (mir::MutabilityReason::Not, false) => (),
(mir::MutabilityReason::Mut { spans }, false) => {