Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/hir-ty/src/infer/mutability.rs')
| -rw-r--r-- | crates/hir-ty/src/infer/mutability.rs | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/crates/hir-ty/src/infer/mutability.rs b/crates/hir-ty/src/infer/mutability.rs index 8e52725e53..6a0daee6ea 100644 --- a/crates/hir-ty/src/infer/mutability.rs +++ b/crates/hir-ty/src/infer/mutability.rs @@ -12,12 +12,11 @@ use hir_expand::name::Name; use intern::sym; use crate::{ - infer::Expectation, lower::lower_to_chalk_mutability, Adjust, Adjustment, AutoBorrow, Interner, - OverloadedDeref, TyBuilder, TyKind, + infer::{expr::ExprIsRead, Expectation, InferenceContext}, + lower::lower_to_chalk_mutability, + Adjust, Adjustment, AutoBorrow, Interner, OverloadedDeref, TyBuilder, TyKind, }; -use super::InferenceContext; - impl InferenceContext<'_> { pub(crate) fn infer_mut_body(&mut self) { self.infer_mut_expr(self.body.body_expr, Mutability::Not); @@ -164,7 +163,11 @@ impl InferenceContext<'_> { if let Some(ty) = self.result.type_of_expr.get(index) { ty.clone() } else { - self.infer_expr(index, &Expectation::none()) + self.infer_expr( + index, + &Expectation::none(), + ExprIsRead::Yes, + ) }; let trait_ref = TyBuilder::trait_ref(self.db, index_trait) .push(base_ty) @@ -180,6 +183,7 @@ impl InferenceContext<'_> { self.infer_mut_expr(index, Mutability::Not); } Expr::UnaryOp { expr, op: UnaryOp::Deref } => { + let mut mutability = mutability; if let Some((f, _)) = self.result.method_resolutions.get_mut(&tgt_expr) { if mutability == Mutability::Mut { if let Some(deref_trait) = self @@ -187,7 +191,17 @@ impl InferenceContext<'_> { .lang_item(self.table.trait_env.krate, LangItem::DerefMut) .and_then(|l| l.as_trait()) { - if let Some(deref_fn) = self + let ty = self.result.type_of_expr.get(*expr); + let is_mut_ptr = ty.is_some_and(|ty| { + let ty = self.table.resolve_ty_shallow(ty); + matches!( + ty.kind(Interner), + chalk_ir::TyKind::Raw(Mutability::Mut, _) + ) + }); + if is_mut_ptr { + mutability = Mutability::Not; + } else if let Some(deref_fn) = self .db .trait_data(deref_trait) .method_by_name(&Name::new_symbol_root(sym::deref_mut.clone())) |