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Refactor/simplify path resolution

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This commit is contained in:
Florian Diebold 2019-01-13 20:26:14 +01:00
parent fa43ef30f4
commit 573f6f8656
1 changed files with 34 additions and 32 deletions
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66
crates/ra_hir/src/code_model_impl/module.rs
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@ -147,41 +147,43 @@ impl Module {
.def_id,
);
let segments = &path.segments;
for (idx, name) in segments.iter().enumerate() {
let curr = if let Some(r) = curr_per_ns.as_ref().take_types() {
r
} else {
return PerNs::none();
for name in path.segments.iter() {
let curr = match curr_per_ns.as_ref().take_types() {
Some(r) => r,
None => {
// we still have path segments left, but the path so far
// didn't resolve in the types namespace => no resolution
// (don't break here because curr_per_ns might contain
// something in the value namespace, and it would be wrong
// to return that)
return PerNs::none();
}
};
let module = match curr.resolve(db) {
Def::Module(it) => it,
Def::Enum(e) => {
if segments.len() == idx + 1 {
// enum variant
let matching_variant =
e.variants(db).into_iter().find(|(n, _variant)| n == name);
if let Some((_n, variant)) = matching_variant {
return PerNs::both(variant.def_id(), e.def_id());
} else {
return PerNs::none();
}
} else if segments.len() == idx {
// enum
return PerNs::types(e.def_id());
} else {
// malformed enum?
return PerNs::none();
// resolve segment in curr
curr_per_ns = match curr.resolve(db) {
Def::Module(m) => {
let scope = m.scope(db);
match scope.get(&name) {
Some(r) => r.def_id,
None => PerNs::none(),
}
}
_ => return PerNs::none(),
};
let scope = module.scope(db);
curr_per_ns = if let Some(r) = scope.get(&name) {
r.def_id
} else {
return PerNs::none();
Def::Enum(e) => {
// enum variant
let matching_variant =
e.variants(db).into_iter().find(|(n, _variant)| n == name);
match matching_variant {
Some((_n, variant)) => PerNs::both(variant.def_id(), e.def_id()),
None => PerNs::none(),
}
}
_ => {
// could be an inherent method call in UFCS form
// (`Struct::method`), or some other kind of associated
// item... Which we currently don't handle (TODO)
PerNs::none()
}
};
}
curr_per_ns