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Speedup trait impl search for goto_implementation

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This commit is contained in:
Lukas Wirth 2021-03-15 13:49:21 +01:00
parent 6c782a5314
commit 6241567948
2 changed files with 19 additions and 3 deletions
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12
crates/hir/src/lib.rs
View File

@ -51,7 +51,8 @@ use hir_expand::{diagnostics::DiagnosticSink, name::name, MacroDefKind};
use hir_ty::{
autoderef,
display::{write_bounds_like_dyn_trait_with_prefix, HirDisplayError, HirFormatter},
method_resolution, to_assoc_type_id,
method_resolution::{self, TyFingerprint},
to_assoc_type_id,
traits::{FnTrait, Solution, SolutionVariables},
AliasTy, BoundVar, CallableDefId, CallableSig, Canonical, DebruijnIndex, GenericPredicate,
InEnvironment, Interner, Obligation, ProjectionPredicate, ProjectionTy, Scalar, Substs, Ty,
@ -1500,13 +1501,20 @@ impl Impl {
def_crates.iter().for_each(|&id| {
all.extend(db.inherent_impls_in_crate(id).all_impls().map(Self::from).filter(filter))
});
let fp = TyFingerprint::for_impl(&ty.value);
for id in def_crates
.iter()
.flat_map(|&id| Crate { id }.reverse_dependencies(db))
.map(|Crate { id }| id)
.chain(def_crates.iter().copied())
{
all.extend(db.trait_impls_in_crate(id).all_impls().map(Self::from).filter(filter));
match fp {
Some(fp) => all.extend(
db.trait_impls_in_crate(id).for_self_ty(fp).map(Self::from).filter(filter),
),
None => all
.extend(db.trait_impls_in_crate(id).all_impls().map(Self::from).filter(filter)),
}
}
all
}

10
crates/hir_ty/src/method_resolution.rs
View File

@ -44,7 +44,7 @@ impl TyFingerprint {
/// Creates a TyFingerprint for looking up an impl. Only certain types can
/// have impls: if we have some `struct S`, we can have an `impl S`, but not
/// `impl &S`. Hence, this will return `None` for reference types and such.
pub(crate) fn for_impl(ty: &Ty) -> Option<TyFingerprint> {
pub fn for_impl(ty: &Ty) -> Option<TyFingerprint> {
let fp = match *ty.interned(&Interner) {
TyKind::Str => TyFingerprint::Str,
TyKind::Never => TyFingerprint::Never,
@ -141,6 +141,14 @@ impl TraitImpls {
}
}
/// Queries all trait impls for the given type.
pub fn for_self_ty(&self, fp: TyFingerprint) -> impl Iterator<Item = ImplId> + '_ {
self.map
.values()
.flat_map(move |impls| impls.get(&None).into_iter().chain(impls.get(&Some(fp))))
.flat_map(|it| it.iter().copied())
}
/// Queries all impls of the given trait.
pub fn for_trait(&self, trait_: TraitId) -> impl Iterator<Item = ImplId> + '_ {
self.map