usr_to_file uses new NormalizedPath type

src/import_pipeline.cc

@@ -634,8 +634,8 @@ bool QueryDb_ImportMain(Config* config,
     // it, load the previous state from disk and rerun IdMap logic later. Do not
     // do this if we have already attempted in the past.
     if (!request->load_previous && !request->previous &&
-        db->usr_to_file.find(LowerPathIfCaseInsensitive(
-            request->current->path)) != db->usr_to_file.end()) {
+        db->usr_to_file.find(NormalizedPath(request->current->path)) !=
+            db->usr_to_file.end()) {
       assert(!request->load_previous);
       request->load_previous = true;
       queue->load_previous_index.Enqueue(std::move(*request));
@@ -719,7 +719,7 @@ bool QueryDb_ImportMain(Config* config,
           working_files->GetFileByFilename(updated_file.path);
       if (working_file) {
         QueryFileId file_id =
-            db->usr_to_file[LowerPathIfCaseInsensitive(working_file->filename)];
+            db->usr_to_file[NormalizedPath(working_file->filename)];
         QueryFile* file = &db->files[file_id.id];
         EmitSemanticHighlighting(db, semantic_cache, working_file, file);
       }

src/message_handler.cc

@@ -42,7 +42,7 @@ bool FindFileOrFail(QueryDatabase* db,
                     QueryFileId* out_file_id) {
   *out_query_file = nullptr;
 
-  auto it = db->usr_to_file.find(LowerPathIfCaseInsensitive(absolute_path));
+  auto it = db->usr_to_file.find(NormalizedPath(absolute_path));
   if (it != db->usr_to_file.end()) {
     QueryFile& file = db->files[it->second.id];
     if (file.def) {

src/messages/text_document_code_action.cc

@@ -95,8 +95,8 @@ optional<QueryFileId> GetImplementationFile(QueryDatabase* db,
 
   // No associated definition, scan the project for a file in the same
   // directory with the same base-name.
-  std::string original_path = LowerPathIfCaseInsensitive(file->def->path);
-  std::string target_path = original_path;
+  NormalizedPath original_path(file->def->path);
+  std::string target_path = original_path.path;
   size_t last = target_path.find_last_of('.');
   if (last != std::string::npos) {
     target_path = target_path.substr(0, last);
@@ -105,14 +105,14 @@ optional<QueryFileId> GetImplementationFile(QueryDatabase* db,
   LOG_S(INFO) << "!! Looking for impl file that starts with " << target_path;
 
   for (auto& entry : db->usr_to_file) {
-    const std::string& path = entry.first;
+    const NormalizedPath& path = entry.first;
 
     // Do not consider header files for implementation files.
     // TODO: make file extensions configurable.
-    if (EndsWith(path, ".h") || EndsWith(path, ".hpp"))
+    if (EndsWith(path.path, ".h") || EndsWith(path.path, ".hpp"))
       continue;
 
-    if (StartsWith(path, target_path) && path != original_path) {
+    if (StartsWith(path.path, target_path) && path != original_path) {
       return entry.second;
     }
   }

src/query.cc

@@ -294,14 +294,15 @@ QueryFile::Def BuildFileDef(const IdMap& id_map, const IndexFile& indexed) {
 inline optional<QueryFileId> GetQueryFileIdFromPath(QueryDatabase* query_db,
                                                     const std::string& path,
                                                     bool create_if_missing) {
-  auto it = query_db->usr_to_file.find(LowerPathIfCaseInsensitive(path));
+  NormalizedPath normalized_path(path);
+  auto it = query_db->usr_to_file.find(normalized_path);
   if (it != query_db->usr_to_file.end())
     return QueryFileId(it->second.id);
   if (!create_if_missing)
     return {};
 
   size_t idx = query_db->files.size();
-  query_db->usr_to_file[LowerPathIfCaseInsensitive(path)] = QueryFileId(idx);
+  query_db->usr_to_file[normalized_path] = QueryFileId(idx);
   query_db->files.push_back(QueryFile(path));
   return QueryFileId(idx);
 }
@@ -752,6 +753,17 @@ std::string IndexUpdate::ToString() {
   return output.GetString();
 }
 
+NormalizedPath::NormalizedPath(const std::string& path)
+    : path(LowerPathIfCaseInsensitive(path)) {}
+
+bool NormalizedPath::operator==(const NormalizedPath& rhs) const {
+  return path == rhs.path;
+}
+
+bool NormalizedPath::operator!=(const NormalizedPath& rhs) const {
+  return path != rhs.path;
+}
+
 // ------------------------
 // QUERYDB THREAD FUNCTIONS
 // ------------------------
@@ -810,7 +822,7 @@ void QueryDatabase::ApplyIndexUpdate(IndexUpdate* update) {
   }
 
   for (const std::string& filename : update->files_removed)
-    files[usr_to_file[filename].id].def = nullopt;
+    files[usr_to_file[NormalizedPath(filename)].id].def = nullopt;
   ImportOrUpdate(update->files_def_update);
 
   RemoveUsrs(SymbolKind::Type, update->types_removed);
@@ -838,7 +850,7 @@ void QueryDatabase::ImportOrUpdate(
   // This function runs on the querydb thread.
 
   for (auto& def : updates) {
-    auto it = usr_to_file.find(LowerPathIfCaseInsensitive(def.path));
+    auto it = usr_to_file.find(NormalizedPath(def.path));
     assert(it != usr_to_file.end());
 
     QueryFile& existing = files[it->second.id];

src/query.h

@@ -334,6 +334,15 @@ MAKE_REFLECT_STRUCT(IndexUpdate,
                     vars_declarations,
                     vars_uses);
 
+struct NormalizedPath {
+  explicit NormalizedPath(const std::string& path);
+  bool operator==(const NormalizedPath& rhs) const;
+  bool operator!=(const NormalizedPath& rhs) const;
+
+  std::string path;
+};
+MAKE_HASHABLE(NormalizedPath, t.path);
+
 // The query database is heavily optimized for fast queries. It is stored
 // in-memory.
 struct QueryDatabase {
@@ -350,9 +359,7 @@ struct QueryDatabase {
   std::vector<QueryVar> vars;
 
   // Lookup symbol based on a usr.
-  // NOTE: For usr_to_file make sure to call LowerPathIfCaseInsensitive on key.
-  // TODO: add type wrapper to enforce we call it
-  spp::sparse_hash_map<std::string, QueryFileId> usr_to_file;
+  spp::sparse_hash_map<NormalizedPath, QueryFileId> usr_to_file;
   spp::sparse_hash_map<Usr, QueryTypeId> usr_to_type;
   spp::sparse_hash_map<Usr, QueryFuncId> usr_to_func;
   spp::sparse_hash_map<Usr, QueryVarId> usr_to_var;