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//! FIXME: write short doc here
use hir_def::{type_ref::TypeRef, AstItemDef};
use ra_syntax::ast::{self};
use crate::{
db::{AstDatabase, DefDatabase, HirDatabase},
generics::HasGenericParams,
resolve::Resolver,
ty::Ty,
AssocItem, Crate, HasSource, ImplBlock, Module, Source, TraitRef,
};
impl HasSource for ImplBlock {
type Ast = ast::ImplBlock;
fn source(self, db: &(impl DefDatabase + AstDatabase)) -> Source<ast::ImplBlock> {
self.id.source(db)
}
}
impl ImplBlock {
pub(crate) fn containing(db: &impl DefDatabase, item: AssocItem) -> Option<ImplBlock> {
let module = item.module(db);
let crate_def_map = db.crate_def_map(module.id.krate);
crate_def_map[module.id.module_id].impls.iter().copied().map(ImplBlock::from).find(|it| {
db.impl_data(it.id).items().iter().copied().map(AssocItem::from).any(|it| it == item)
})
}
pub fn target_trait(&self, db: &impl DefDatabase) -> Option<TypeRef> {
db.impl_data(self.id).target_trait().cloned()
}
pub fn target_type(&self, db: &impl DefDatabase) -> TypeRef {
db.impl_data(self.id).target_type().clone()
}
pub fn target_ty(&self, db: &impl HirDatabase) -> Ty {
Ty::from_hir(db, &self.resolver(db), &self.target_type(db))
}
pub fn target_trait_ref(&self, db: &impl HirDatabase) -> Option<TraitRef> {
let target_ty = self.target_ty(db);
TraitRef::from_hir(db, &self.resolver(db), &self.target_trait(db)?, Some(target_ty))
}
pub fn items(&self, db: &impl DefDatabase) -> Vec<AssocItem> {
db.impl_data(self.id).items().iter().map(|it| (*it).into()).collect()
}
pub fn is_negative(&self, db: &impl DefDatabase) -> bool {
db.impl_data(self.id).is_negative()
}
pub fn module(&self, db: &impl DefDatabase) -> Module {
self.id.module(db).into()
}
pub fn krate(&self, db: &impl DefDatabase) -> Crate {
Crate { crate_id: self.module(db).id.krate }
}
pub(crate) fn resolver(&self, db: &impl DefDatabase) -> Resolver {
let r = self.module(db).resolver(db);
// add generic params, if present
let p = self.generic_params(db);
let r = if !p.params.is_empty() { r.push_generic_params_scope(p) } else { r };
let r = r.push_impl_block_scope(self.clone());
r
}
}
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