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Push resolver up

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This commit is contained in:
Aleksey Kladov 2020-01-14 14:11:07 +01:00
parent ec4775830c
commit 7ec62ea5e6
1 changed files with 51 additions and 21 deletions
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72
crates/ra_hir_ty/src/method_resolution.rs
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@ -12,7 +12,7 @@ use hir_def::{
use hir_expand::name::Name;
use ra_db::CrateId;
use ra_prof::profile;
use rustc_hash::FxHashMap;
use rustc_hash::{FxHashMap, FxHashSet};
use super::Substs;
use crate::{
@ -177,6 +177,9 @@ pub fn iterate_method_candidates<T>(
mode: LookupMode,
mut callback: impl FnMut(&Ty, AssocItemId) -> Option<T>,
) -> Option<T> {
let traits_in_scope = resolver.traits_in_scope(db);
let krate = resolver.krate()?;
let env = TraitEnvironment::lower(db, resolver);
match mode {
LookupMode::MethodCall => {
// For method calls, rust first does any number of autoderef, and then one
@ -209,7 +212,9 @@ pub fn iterate_method_candidates<T>(
if let Some(result) = iterate_method_candidates_with_autoref(
&deref_chain[i..],
db,
resolver,
env.clone(),
krate,
&traits_in_scope,
name,
&mut callback,
) {
@ -220,7 +225,15 @@ pub fn iterate_method_candidates<T>(
}
LookupMode::Path => {
// No autoderef for path lookups
iterate_method_candidates_for_self_ty(&ty, db, resolver, name, &mut callback)
iterate_method_candidates_for_self_ty(
&ty,
db,
env,
krate,
&traits_in_scope,
name,
&mut callback,
)
}
}
}
@ -228,7 +241,9 @@ pub fn iterate_method_candidates<T>(
fn iterate_method_candidates_with_autoref<T>(
deref_chain: &[Canonical<Ty>],
db: &impl HirDatabase,
resolver: &Resolver,
env: Arc<TraitEnvironment>,
krate: CrateId,
traits_in_scope: &FxHashSet<TraitId>,
name: Option<&Name>,
mut callback: impl FnMut(&Ty, AssocItemId) -> Option<T>,
) -> Option<T> {
@ -236,7 +251,9 @@ fn iterate_method_candidates_with_autoref<T>(
&deref_chain[0],
&deref_chain[1..],
db,
resolver,
env.clone(),
krate,
&traits_in_scope,
name,
&mut callback,
) {
@ -250,7 +267,9 @@ fn iterate_method_candidates_with_autoref<T>(
&refed,
deref_chain,
db,
resolver,
env.clone(),
krate,
&traits_in_scope,
name,
&mut callback,
) {
@ -264,7 +283,9 @@ fn iterate_method_candidates_with_autoref<T>(
&ref_muted,
deref_chain,
db,
resolver,
env.clone(),
krate,
&traits_in_scope,
name,
&mut callback,
) {
@ -277,14 +298,15 @@ fn iterate_method_candidates_by_receiver<T>(
receiver_ty: &Canonical<Ty>,
rest_of_deref_chain: &[Canonical<Ty>],
db: &impl HirDatabase,
resolver: &Resolver,
env: Arc<TraitEnvironment>,
krate: CrateId,
traits_in_scope: &FxHashSet<TraitId>,
name: Option<&Name>,
mut callback: impl FnMut(&Ty, AssocItemId) -> Option<T>,
) -> Option<T> {
// We're looking for methods with *receiver* type receiver_ty. These could
// be found in any of the derefs of receiver_ty, so we have to go through
// that.
let krate = resolver.krate()?;
for self_ty in std::iter::once(receiver_ty).chain(rest_of_deref_chain) {
if let Some(result) =
iterate_inherent_methods(self_ty, db, name, Some(receiver_ty), krate, &mut callback)
@ -296,7 +318,9 @@ fn iterate_method_candidates_by_receiver<T>(
if let Some(result) = iterate_trait_method_candidates(
self_ty,
db,
resolver,
env.clone(),
krate,
&traits_in_scope,
name,
Some(receiver_ty),
&mut callback,
@ -310,17 +334,25 @@ fn iterate_method_candidates_by_receiver<T>(
fn iterate_method_candidates_for_self_ty<T>(
self_ty: &Canonical<Ty>,
db: &impl HirDatabase,
resolver: &Resolver,
env: Arc<TraitEnvironment>,
krate: CrateId,
traits_in_scope: &FxHashSet<TraitId>,
name: Option<&Name>,
mut callback: impl FnMut(&Ty, AssocItemId) -> Option<T>,
) -> Option<T> {
let krate = resolver.krate()?;
if let Some(result) = iterate_inherent_methods(self_ty, db, name, None, krate, &mut callback) {
return Some(result);
}
if let Some(result) =
iterate_trait_method_candidates(self_ty, db, resolver, name, None, &mut callback)
{
if let Some(result) = iterate_trait_method_candidates(
self_ty,
db,
env,
krate,
traits_in_scope,
name,
None,
&mut callback,
) {
return Some(result);
}
None
@ -329,14 +361,13 @@ fn iterate_method_candidates_for_self_ty<T>(
fn iterate_trait_method_candidates<T>(
self_ty: &Canonical<Ty>,
db: &impl HirDatabase,
resolver: &Resolver,
env: Arc<TraitEnvironment>,
krate: CrateId,
traits_in_scope: &FxHashSet<TraitId>,
name: Option<&Name>,
receiver_ty: Option<&Canonical<Ty>>,
mut callback: impl FnMut(&Ty, AssocItemId) -> Option<T>,
) -> Option<T> {
let krate = resolver.krate()?;
// FIXME: maybe put the trait_env behind a query (need to figure out good input parameters for that)
let env = TraitEnvironment::lower(db, resolver);
// if ty is `impl Trait` or `dyn Trait`, the trait doesn't need to be in scope
let inherent_trait = self_ty.value.inherent_trait().into_iter();
// if we have `T: Trait` in the param env, the trait doesn't need to be in scope
@ -344,8 +375,7 @@ fn iterate_trait_method_candidates<T>(
.trait_predicates_for_self_ty(&self_ty.value)
.map(|tr| tr.trait_)
.flat_map(|t| all_super_traits(db, t));
let traits =
inherent_trait.chain(traits_from_env).chain(resolver.traits_in_scope(db).into_iter());
let traits = inherent_trait.chain(traits_from_env).chain(traits_in_scope.iter().copied());
'traits: for t in traits {
let data = db.trait_data(t);