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Add basic infrastructure for assoc type projection

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This commit is contained in:
Florian Diebold 2019-05-12 17:53:44 +02:00
parent 6f946f9656
commit 49489dc20c
9 changed files with 190 additions and 21 deletions
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21
crates/ra_hir/src/code_model.rs
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@ -779,6 +779,19 @@ impl Trait {
self.trait_data(db).items().to_vec()
}
pub fn associated_type_by_name(self, db: &impl DefDatabase, name: Name) -> Option<TypeAlias> {
let trait_data = self.trait_data(db);
trait_data
.items()
.iter()
.filter_map(|item| match item {
TraitItem::TypeAlias(t) => Some(*t),
_ => None,
})
.filter(|t| t.name(db) == name)
.next()
}
pub(crate) fn trait_data(self, db: &impl DefDatabase) -> Arc<TraitData> {
db.trait_data(self)
}
@ -831,8 +844,12 @@ impl TypeAlias {
}
}
pub fn type_ref(self, db: &impl DefDatabase) -> Arc<TypeRef> {
db.type_alias_ref(self)
pub fn type_ref(self, db: &impl DefDatabase) -> Option<TypeRef> {
db.type_alias_data(self).type_ref.clone()
}
pub fn name(self, db: &impl DefDatabase) -> Name {
db.type_alias_data(self).name.clone()
}
/// Builds a resolver for the type references in this type alias.