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Add and start using TraitRef and ProjectionTy builders

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This commit is contained in:
Florian Diebold 2021-04-03 21:50:52 +02:00
parent 2ead65190e
commit cd227f581e
6 changed files with 48 additions and 39 deletions
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29
crates/hir_ty/src/lib.rs
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@ -927,6 +927,35 @@ impl TyBuilder<hir_def::AdtId> {
}
}
impl TyBuilder<TraitId> {
pub fn trait_ref(db: &dyn HirDatabase, trait_id: TraitId) -> TyBuilder<TraitId> {
let generics = generics(db.upcast(), trait_id.into());
let param_count = generics.len();
TyBuilder::new(trait_id, param_count)
}
pub fn build(self) -> TraitRef {
let (trait_id, substitution) = self.build_internal();
TraitRef { trait_id: to_chalk_trait_id(trait_id), substitution }
}
}
impl TyBuilder<TypeAliasId> {
pub fn assoc_type_projection(
db: &dyn HirDatabase,
type_alias: TypeAliasId,
) -> TyBuilder<TypeAliasId> {
let generics = generics(db.upcast(), type_alias.into());
let param_count = generics.len();
TyBuilder::new(type_alias, param_count)
}
pub fn build(self) -> ProjectionTy {
let (type_alias, substitution) = self.build_internal();
ProjectionTy { associated_ty_id: to_assoc_type_id(type_alias), substitution }
}
}
impl Ty {
pub fn as_reference(&self) -> Option<(&Ty, Mutability)> {
match self.kind(&Interner) {