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Provide signature help when editing generic args

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This commit is contained in:
Jonas Schievink 2022-03-18 19:56:34 +01:00
parent e3217c5015
commit 0642724e94
4 changed files with 305 additions and 8 deletions
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14
crates/hir/src/lib.rs
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@ -2075,7 +2075,7 @@ impl GenericDef {
id: LifetimeParamId { parent: self.into(), local_id },
})
.map(GenericParam::LifetimeParam);
ty_params.chain(lt_params).collect()
lt_params.chain(ty_params).collect()
}
pub fn type_params(self, db: &dyn HirDatabase) -> Vec<TypeOrConstParam> {
@ -2336,6 +2336,18 @@ impl TypeParam {
self.id.parent().module(db.upcast()).into()
}
/// Is this type parameter implicitly introduced (eg. `Self` in a trait or an `impl Trait`
/// argument)?
pub fn is_implicit(self, db: &dyn HirDatabase) -> bool {
let params = db.generic_params(self.id.parent());
let data = &params.type_or_consts[self.id.local_id()];
match data.type_param().unwrap().provenance {
hir_def::generics::TypeParamProvenance::TypeParamList => false,
hir_def::generics::TypeParamProvenance::TraitSelf
| hir_def::generics::TypeParamProvenance::ArgumentImplTrait => true,
}
}
pub fn ty(self, db: &dyn HirDatabase) -> Type {
let resolver = self.id.parent().resolver(db.upcast());
let krate = self.id.parent().module(db.upcast()).krate();