From 68626e4ef5acfea05812b68f41efa2bcd5bea448 Mon Sep 17 00:00:00 2001
From: Kirill Bulatov <mail4score@gmail.com>
Date: Sun, 17 Jan 2021 00:53:15 +0200
Subject: Draft the working completion

---
 crates/ide_db/src/helpers/import_assets.rs | 30 ++++++++++++++++++++----------
 crates/ide_db/src/imports_locator.rs       | 16 ++++++++++------
 2 files changed, 30 insertions(+), 16 deletions(-)

(limited to 'crates/ide_db/src')

diff --git a/crates/ide_db/src/helpers/import_assets.rs b/crates/ide_db/src/helpers/import_assets.rs
index e284220c1..a080b6ca7 100644
--- a/crates/ide_db/src/helpers/import_assets.rs
+++ b/crates/ide_db/src/helpers/import_assets.rs
@@ -5,7 +5,7 @@ use rustc_hash::FxHashSet;
 use syntax::{ast, AstNode};
 
 use crate::{
-    imports_locator::{self, AssocItemSearch},
+    imports_locator::{self, AssocItemSearch, DEFAULT_QUERY_SEARCH_LIMIT},
     RootDatabase,
 };
 
@@ -173,6 +173,7 @@ impl ImportAssets {
         let current_crate = self.module_with_candidate.krate();
 
         let filter = |candidate: Either<hir::ModuleDef, hir::MacroDef>| {
+            // TODO kb process all traits at once instead?
             trait_candidates.clear();
             match &self.import_candidate {
                 ImportCandidate::TraitAssocItem(trait_candidate) => {
@@ -191,6 +192,11 @@ impl ImportAssets {
                             None,
                             |_, assoc| {
                                 if canidate_assoc_item == assoc {
+                                    if let AssocItem::Function(f) = assoc {
+                                        if f.self_param(db).is_some() {
+                                            return None;
+                                        }
+                                    }
                                     Some(assoc_to_module_def(assoc))
                                 } else {
                                     None
@@ -238,17 +244,21 @@ impl ImportAssets {
             // see https://github.com/rust-analyzer/rust-analyzer/pull/7293#issuecomment-761585032
             // and https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Fwg-rls-2.2E0/topic/Blanket.20trait.20impls.20lookup
             // for the details
-            NameToImport::Fuzzy(fuzzy_name) => imports_locator::find_similar_imports(
-                sema,
-                current_crate,
-                fuzzy_name.clone(),
-                match self.import_candidate {
+            NameToImport::Fuzzy(fuzzy_name) => {
+                let (assoc_item_search, limit) = match self.import_candidate {
                     ImportCandidate::TraitAssocItem(_) | ImportCandidate::TraitMethod(_) => {
-                        AssocItemSearch::AssocItemsOnly
+                        (AssocItemSearch::AssocItemsOnly, None)
                     }
-                    _ => AssocItemSearch::Exclude,
-                },
-            ),
+                    _ => (AssocItemSearch::Exclude, Some(DEFAULT_QUERY_SEARCH_LIMIT)),
+                };
+                imports_locator::find_similar_imports(
+                    sema,
+                    current_crate,
+                    fuzzy_name.clone(),
+                    assoc_item_search,
+                    limit,
+                )
+            }
         };
 
         let mut res = unfiltered_imports
diff --git a/crates/ide_db/src/imports_locator.rs b/crates/ide_db/src/imports_locator.rs
index d69e65960..502e8281a 100644
--- a/crates/ide_db/src/imports_locator.rs
+++ b/crates/ide_db/src/imports_locator.rs
@@ -15,7 +15,7 @@ use crate::{
 use either::Either;
 use rustc_hash::FxHashSet;
 
-const QUERY_SEARCH_LIMIT: usize = 40;
+pub(crate) const DEFAULT_QUERY_SEARCH_LIMIT: usize = 40;
 
 pub fn find_exact_imports<'a>(
     sema: &Semantics<'a, RootDatabase>,
@@ -29,11 +29,11 @@ pub fn find_exact_imports<'a>(
         {
             let mut local_query = symbol_index::Query::new(name_to_import.clone());
             local_query.exact();
-            local_query.limit(QUERY_SEARCH_LIMIT);
+            local_query.limit(DEFAULT_QUERY_SEARCH_LIMIT);
             local_query
         },
         import_map::Query::new(name_to_import)
-            .limit(QUERY_SEARCH_LIMIT)
+            .limit(DEFAULT_QUERY_SEARCH_LIMIT)
             .name_only()
             .search_mode(import_map::SearchMode::Equals)
             .case_sensitive(),
@@ -51,13 +51,13 @@ pub fn find_similar_imports<'a>(
     krate: Crate,
     fuzzy_search_string: String,
     assoc_item_search: AssocItemSearch,
+    limit: Option<usize>,
 ) -> Box<dyn Iterator<Item = Either<ModuleDef, MacroDef>> + 'a> {
     let _p = profile::span("find_similar_imports");
 
     let mut external_query = import_map::Query::new(fuzzy_search_string.clone())
         .search_mode(import_map::SearchMode::Fuzzy)
-        .name_only()
-        .limit(QUERY_SEARCH_LIMIT);
+        .name_only();
 
     match assoc_item_search {
         AssocItemSearch::Include => {}
@@ -70,7 +70,11 @@ pub fn find_similar_imports<'a>(
     }
 
     let mut local_query = symbol_index::Query::new(fuzzy_search_string);
-    local_query.limit(QUERY_SEARCH_LIMIT);
+
+    if let Some(limit) = limit {
+        external_query = external_query.limit(limit);
+        local_query.limit(limit);
+    }
 
     let db = sema.db;
     Box::new(find_imports(sema, krate, local_query, external_query).filter(
-- 
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