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Generalize reborrow hints as adjustment hints

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This commit is contained in:
Lukas Wirth 2022-11-04 17:11:15 +01:00
parent cd2603299c
commit c98fc537e6
9 changed files with 182 additions and 78 deletions
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37
crates/hir/src/semantics.rs
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@ -29,9 +29,10 @@ use crate::{
db::HirDatabase,
semantics::source_to_def::{ChildContainer, SourceToDefCache, SourceToDefCtx},
source_analyzer::{resolve_hir_path, SourceAnalyzer},
Access, BindingMode, BuiltinAttr, Callable, ConstParam, Crate, DeriveHelper, Field, Function,
HasSource, HirFileId, Impl, InFile, Label, LifetimeParam, Local, Macro, Module, ModuleDef,
Name, Path, ScopeDef, ToolModule, Trait, Type, TypeAlias, TypeParam, VariantDef,
Access, Adjust, AutoBorrow, BindingMode, BuiltinAttr, Callable, ConstParam, Crate,
DeriveHelper, Field, Function, HasSource, HirFileId, Impl, InFile, Label, LifetimeParam, Local,
Macro, Module, ModuleDef, Name, OverloadedDeref, Path, ScopeDef, ToolModule, Trait, Type,
TypeAlias, TypeParam, VariantDef,
};
#[derive(Debug, Clone, PartialEq, Eq)]
@ -333,9 +334,8 @@ impl<'db, DB: HirDatabase> Semantics<'db, DB> {
self.imp.resolve_trait(trait_)
}
// FIXME: Figure out a nice interface to inspect adjustments
pub fn is_implicit_reborrow(&self, expr: &ast::Expr) -> Option<Mutability> {
self.imp.is_implicit_reborrow(expr)
pub fn expr_adjustments(&self, expr: &ast::Expr) -> Option<Vec<Adjust>> {
self.imp.expr_adjustments(expr)
}
pub fn type_of_expr(&self, expr: &ast::Expr) -> Option<TypeInfo> {
@ -1067,8 +1067,29 @@ impl<'db> SemanticsImpl<'db> {
}
}
fn is_implicit_reborrow(&self, expr: &ast::Expr) -> Option<Mutability> {
self.analyze(expr.syntax())?.is_implicit_reborrow(self.db, expr)
fn expr_adjustments(&self, expr: &ast::Expr) -> Option<Vec<Adjust>> {
let mutability = |m| match m {
hir_ty::Mutability::Not => Mutability::Shared,
hir_ty::Mutability::Mut => Mutability::Mut,
};
self.analyze(expr.syntax())?.expr_adjustments(self.db, expr).map(|it| {
it.iter()
.map(|adjust| match adjust.kind {
hir_ty::Adjust::NeverToAny => Adjust::NeverToAny,
hir_ty::Adjust::Deref(Some(hir_ty::OverloadedDeref(m))) => {
Adjust::Deref(Some(OverloadedDeref(mutability(m))))
}
hir_ty::Adjust::Deref(None) => Adjust::Deref(None),
hir_ty::Adjust::Borrow(hir_ty::AutoBorrow::RawPtr(m)) => {
Adjust::Borrow(AutoBorrow::RawPtr(mutability(m)))
}
hir_ty::Adjust::Borrow(hir_ty::AutoBorrow::Ref(m)) => {
Adjust::Borrow(AutoBorrow::Ref(mutability(m)))
}
hir_ty::Adjust::Pointer(pc) => Adjust::Pointer(pc),
})
.collect()
})
}
fn type_of_expr(&self, expr: &ast::Expr) -> Option<TypeInfo> {