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Fix find_path search not reducing scope appropriately for foreign items

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This commit is contained in:
Lukas Wirth 2024-06-03 19:21:19 +02:00
parent 60fa981df1
commit db80216dac
1 changed files with 18 additions and 12 deletions
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30
crates/hir-def/src/find_path.rs
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@ -48,7 +48,7 @@ pub fn find_path(
)
}
#[derive(Copy, Clone, Debug)]
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
enum Stability {
Unstable,
Stable,
@ -322,12 +322,14 @@ fn calculate_best_path(
None => *best_path = Some(new_path),
};
if item.krate(ctx.db) == Some(ctx.from.krate) {
let mut best_path_len = max_len;
let db = ctx.db;
let mut best_path_len = max_len;
if item.krate(db) == Some(ctx.from.krate) {
// Item was defined in the same crate that wants to import it. It cannot be found in any
// dependency in this case.
// FIXME: cache the `find_local_import_locations` output?
for (module_id, name) in find_local_import_locations(ctx.db, item, ctx.from) {
for (module_id, name) in find_local_import_locations(db, item, ctx.from) {
if !visited_modules.insert(module_id) {
continue;
}
@ -342,7 +344,9 @@ fn calculate_best_path(
Some(best_path) => select_best_path(best_path, path, ctx.cfg),
None => path,
};
best_path_len = new_path.0.len();
if new_path.1 == Stable {
best_path_len = new_path.0.len();
}
update_best_path(&mut best_path, new_path);
}
}
@ -351,8 +355,8 @@ fn calculate_best_path(
// too (unless we can't name it at all). It could *also* be (re)exported by the same crate
// that wants to import it here, but we always prefer to use the external path here.
for dep in &ctx.db.crate_graph()[ctx.from.krate].dependencies {
let import_map = ctx.db.import_map(dep.crate_id);
for dep in &db.crate_graph()[ctx.from.krate].dependencies {
let import_map = db.import_map(dep.crate_id);
let Some(import_info_for) = import_map.import_info_for(item) else { continue };
for info in import_info_for {
if info.is_doc_hidden {
@ -367,8 +371,7 @@ fn calculate_best_path(
def_map,
visited_modules,
info.container,
max_len - 1,
// fixme shouldnt we consider the best path length here?
best_path_len - 1,
);
let Some((mut path, path_stability)) = path else {
continue;
@ -381,11 +384,14 @@ fn calculate_best_path(
zip_stability(path_stability, if info.is_unstable { Unstable } else { Stable }),
);
let new_path_with_stab = match best_path.take() {
let new_path = match best_path.take() {
Some(best_path) => select_best_path(best_path, path_with_stab, ctx.cfg),
None => path_with_stab,
};
update_best_path(&mut best_path, new_path_with_stab);
if new_path.1 == Stable {
best_path_len = new_path.0.len();
}
update_best_path(&mut best_path, new_path);
}
}
}
@ -393,7 +399,7 @@ fn calculate_best_path(
}
/// Select the best (most relevant) path between two paths.
/// This accounts for stability, path length whether std should be chosen over alloc/core paths as
/// This accounts for stability, path length whether, std should be chosen over alloc/core paths as
/// well as ignoring prelude like paths or not.
fn select_best_path(
old_path @ (_, old_stability): (ModPath, Stability),