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Add need-mut and unused-mut diagnostics

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This commit is contained in:
hkalbasi 2023-02-21 22:30:38 +03:30
parent c0a0664d12
commit a25710b0c0
10 changed files with 1089 additions and 277 deletions
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48
crates/hir/src/lib.rs
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@ -63,7 +63,7 @@ use hir_ty::{
display::HexifiedConst,
layout::layout_of_ty,
method_resolution::{self, TyFingerprint},
mir::interpret_mir,
mir::{self, interpret_mir},
primitive::UintTy,
traits::FnTrait,
AliasTy, CallableDefId, CallableSig, Canonical, CanonicalVarKinds, Cast, ClosureId,
@ -85,12 +85,12 @@ use crate::db::{DefDatabase, HirDatabase};
pub use crate::{
attrs::{HasAttrs, Namespace},
diagnostics::{
AnyDiagnostic, BreakOutsideOfLoop, ExpectedFunction, InactiveCode, IncorrectCase,
InvalidDeriveTarget, MacroError, MalformedDerive, MismatchedArgCount, MissingFields,
MissingMatchArms, MissingUnsafe, NoSuchField, PrivateAssocItem, PrivateField,
AnyDiagnostic, BreakOutsideOfLoop, InactiveCode, IncorrectCase, InvalidDeriveTarget,
MacroError, MalformedDerive, MismatchedArgCount, MissingFields, MissingMatchArms,
MissingUnsafe, NeedMut, NoSuchField, PrivateAssocItem, PrivateField,
ReplaceFilterMapNextWithFindMap, TypeMismatch, UnimplementedBuiltinMacro,
UnresolvedExternCrate, UnresolvedField, UnresolvedImport, UnresolvedMacroCall,
UnresolvedMethodCall, UnresolvedModule, UnresolvedProcMacro,
UnresolvedExternCrate, UnresolvedImport, UnresolvedMacroCall, UnresolvedModule,
UnresolvedProcMacro, UnusedMut,
},
has_source::HasSource,
semantics::{PathResolution, Semantics, SemanticsScope, TypeInfo, VisibleTraits},
@ -1500,6 +1500,38 @@ impl DefWithBody {
}
}
let hir_body = db.body(self.into());
if let Ok(mir_body) = db.mir_body(self.into()) {
let mol = mir::borrowck::mutability_of_locals(&mir_body);
for (binding_id, _) in hir_body.bindings.iter() {
let need_mut = &mol[mir_body.binding_locals[binding_id]];
let local = Local { parent: self.into(), binding_id };
match (need_mut, local.is_mut(db)) {
(mir::borrowck::Mutability::Mut { .. }, true)
| (mir::borrowck::Mutability::Not, false) => (),
(mir::borrowck::Mutability::Mut { span }, false) => {
let span: InFile<SyntaxNodePtr> = match span {
mir::MirSpan::ExprId(e) => match source_map.expr_syntax(*e) {
Ok(s) => s.map(|x| x.into()),
Err(_) => continue,
},
mir::MirSpan::PatId(p) => match source_map.pat_syntax(*p) {
Ok(s) => s.map(|x| match x {
Either::Left(e) => e.into(),
Either::Right(e) => e.into(),
}),
Err(_) => continue,
},
mir::MirSpan::Unknown => continue,
};
acc.push(NeedMut { local, span }.into());
}
(mir::borrowck::Mutability::Not, true) => acc.push(UnusedMut { local }.into()),
}
}
}
for diagnostic in BodyValidationDiagnostic::collect(db, self.into()) {
match diagnostic {
BodyValidationDiagnostic::RecordMissingFields {
@ -2490,6 +2522,10 @@ impl LocalSource {
pub fn syntax(&self) -> &SyntaxNode {
self.source.value.syntax()
}
pub fn syntax_ptr(self) -> InFile<SyntaxNodePtr> {
self.source.map(|x| SyntaxNodePtr::new(x.syntax()))
}
}
impl Local {