textDocument/references: include base references by default

README.md

@@ -14,7 +14,20 @@ a C/C++/Objective-C language server.
   * preprocessor skipped regions
   * semantic highlighting, including support for [rainbow semantic highlighting](https://medium.com/@evnbr/coding-in-color-3a6db2743a1e)
 
-It makes use of C++17 features, has less third-party dependencies and slimmed-down code base. Cross reference features are strenghened, (see [wiki/FAQ]). It currently uses libclang to index C++ code but will switch to Clang C++ API. Refactoring and formatting are non-goals as they can be provided by clang-format, clang-include-fixer and other Clang based tools.
+It makes use of C++17 features, has less third-party dependencies and slimmed-down code base. Cross reference features are strenghened, (see [wiki/FAQ](../../wiki/FAQ). It currently uses libclang to index C++ code but will switch to Clang C++ API. Refactoring and formatting are non-goals as they can be provided by clang-format, clang-include-fixer and other Clang based tools.
+
+The comparison with cquery as noted on 2018-05-17:
+
+|             | cquery                         | ccls                      |
+|------------ |--------------------------------|---------------------------|
+| third_party | more                           | fewer                     |
+| C++         | C++14                          | C++17                     |
+| clang API   | libclang (C)                   | libclang + clang/llvm C++ |
+| Filesystem  | AbsolutePath + custom routines | llvm/Support              |
+| index       |                                | slight enhancement        |
+| pipeline    | index merge+id remapping       | simpler and more robust   |
+
+cquery has system include path detection (through running the compiler driver) while ccls does not.
 
 # >>> [Getting started](../../wiki/Getting-started) (CLICK HERE) <<<
 

src/filesystem.cc

@@ -3,32 +3,31 @@ using namespace llvm;
 
 #include "utils.h"
 
-#include <utility>
+#include <vector>
 
 void GetFilesInFolder(std::string folder,
                       bool recursive,
                       bool dir_prefix,
                       const std::function<void(const std::string&)>& handler) {
   EnsureEndsInSlash(folder);
-  std::error_code ec;
-  if (recursive)
-    for (sys::fs::recursive_directory_iterator I(folder, ec), E; I != E && !ec;
-         I.increment(ec)) {
-      std::string path = I->path(), filename = sys::path::filename(path);
-      if (filename[0] != '.' || filename == ".ccls") {
-        if (!dir_prefix)
-          path = path.substr(folder.size());
-        handler(path);
-      }
-    }
-  else
+  std::vector<std::string> st{folder};
+  while (st.size()) {
+    std::error_code ec;
+    folder = st.back();
+    st.pop_back();
     for (sys::fs::directory_iterator I(folder, ec), E; I != E && !ec;
          I.increment(ec)) {
+      auto Status = I->status();
+      if (!Status) continue;
       std::string path = I->path(), filename = sys::path::filename(path);
       if (filename[0] != '.' || filename == ".ccls") {
-        if (!dir_prefix)
-          path = path.substr(folder.size());
-        handler(path);
+        if (sys::fs::is_regular_file(*Status)) {
+          if (!dir_prefix)
+            path = path.substr(folder.size());
+          handler(path);
+        } else if (recursive && sys::fs::is_directory(*Status))
+          st.push_back(path);
       }
     }
+  }
 }

src/indexer.h

@@ -114,6 +114,7 @@ struct FuncDef : NameMixin<FuncDef> {
   lsSymbolKind kind = lsSymbolKind::Unknown;
   StorageClass storage = StorageClass::Invalid;
 
+  std::vector<Usr> GetBases() const { return bases; }
   bool operator==(const FuncDef& o) const {
     return detailed_name == o.detailed_name && spell == o.spell &&
            extent == o.extent && declaring_type == o.declaring_type &&
@@ -182,6 +183,7 @@ struct TypeDef : NameMixin<TypeDef> {
   int16_t short_name_size = 0;
   lsSymbolKind kind = lsSymbolKind::Unknown;
 
+  std::vector<Usr> GetBases() const { return bases; }
   bool operator==(const TypeDef& o) const {
     return detailed_name == o.detailed_name && spell == o.spell &&
            extent == o.extent && alias_of == o.alias_of && bases == o.bases &&
@@ -240,6 +242,7 @@ struct VarDef : NameMixin<VarDef> {
 
   bool is_local() const { return kind == lsSymbolKind::Variable; }
 
+  std::vector<Usr> GetBases() const { return {}; }
   bool operator==(const VarDef& o) const {
     return detailed_name == o.detailed_name && spell == o.spell &&
            extent == o.extent && type == o.type && kind == o.kind &&

src/messages/text_document_references.cc

@@ -2,7 +2,7 @@
 #include "query_utils.h"
 #include "queue_manager.h"
 
-#include <loguru.hpp>
+#include <unordered_set>
 
 namespace {
 MethodType kMethodType = "textDocument/references";
@@ -10,8 +10,9 @@ MethodType kMethodType = "textDocument/references";
 struct In_TextDocumentReferences : public RequestInMessage {
   MethodType GetMethodType() const override { return kMethodType; }
   struct lsReferenceContext {
+    bool base = true;
     // Include the declaration of the current symbol.
-    bool includeDeclaration;
+    bool includeDeclaration = false;
     // Include references with these |Role| bits set.
     Role role = Role::All;
   };
@@ -24,6 +25,7 @@ struct In_TextDocumentReferences : public RequestInMessage {
   Params params;
 };
 MAKE_REFLECT_STRUCT(In_TextDocumentReferences::lsReferenceContext,
+                    base,
                     includeDeclaration,
                     role);
 MAKE_REFLECT_STRUCT(In_TextDocumentReferences::Params,
@@ -60,17 +62,47 @@ struct Handler_TextDocumentReferences
 
     for (SymbolRef sym : FindSymbolsAtLocation(wfile, file, params.position)) {
       // Found symbol. Return references.
-      EachOccurrenceWithParent(
-          db, sym, params.context.includeDeclaration,
-          [&](Use use, lsSymbolKind parent_kind) {
-            if (use.role & params.context.role)
-              if (std::optional<lsLocationEx> ls_loc =
-                      GetLsLocationEx(db, working_files, use, container)) {
-                if (container)
-                  ls_loc->parentKind = parent_kind;
-                out.result.push_back(*ls_loc);
-              }
-          });
+      std::unordered_set<Usr> seen;
+      seen.insert(sym.usr);
+      std::vector<Usr> stack{sym.usr};
+      if (sym.kind != SymbolKind::Func)
+        params.context.base = false;
+      while (stack.size()) {
+        sym.usr = stack.back();
+        stack.pop_back();
+        auto fn = [&](Use use, lsSymbolKind parent_kind) {
+          if (use.role & params.context.role)
+            if (std::optional<lsLocationEx> ls_loc =
+                    GetLsLocationEx(db, working_files, use, container)) {
+              if (container)
+                ls_loc->parentKind = parent_kind;
+              out.result.push_back(*ls_loc);
+            }
+        };
+        WithEntity(db, sym, [&](const auto& entity) {
+          lsSymbolKind parent_kind = lsSymbolKind::Unknown;
+          for (auto& def : entity.def)
+            if (def.spell) {
+              parent_kind = GetSymbolKind(db, sym);
+              if (params.context.base)
+                for (Usr usr : def.GetBases())
+                  if (!seen.count(usr)) {
+                    seen.insert(usr);
+                    stack.push_back(usr);
+                  }
+              break;
+            }
+          for (Use use : entity.uses)
+            fn(use, parent_kind);
+          if (params.context.includeDeclaration) {
+            for (auto& def : entity.def)
+              if (def.spell)
+                fn(*def.spell, parent_kind);
+            for (Use use : entity.declarations)
+              fn(use, parent_kind);
+          }
+        });
+      }
       break;
     }
 

src/project.cc

@@ -95,6 +95,8 @@ Project::Entry GetCompilationEntryFromCompileCommandEntry(
   }
   if (args.empty())
     return result;
+  args.insert(args.end(), config->extra_flags.begin(),
+              config->extra_flags.end());
 
   std::unique_ptr<OptTable> Opts = driver::createDriverOptTable();
   unsigned MissingArgIndex, MissingArgCount;
@@ -111,6 +113,11 @@ Project::Entry GetCompilationEntryFromCompileCommandEntry(
     config->angle_dirs.insert(entry.ResolveIfRelative(A->getValue()));
   for (const auto* A : Args.filtered(OPT_I, OPT_iquote))
     config->quote_dirs.insert(entry.ResolveIfRelative(A->getValue()));
+  for (const auto* A : Args.filtered(OPT_idirafter)) {
+    std::string dir = entry.ResolveIfRelative(A->getValue());
+    config->angle_dirs.insert(dir);
+    config->quote_dirs.insert(dir);
+  }
 
   for (size_t i = 1; i < args.size(); i++)
     // This is most likely the file path we will be passing to clang. The
@@ -122,10 +129,6 @@ Project::Entry GetCompilationEntryFromCompileCommandEntry(
       continue;
     }
 
-  // We don't do any special processing on user-given extra flags.
-  for (const auto& flag : config->extra_flags)
-    args.push_back(flag);
-
   if (!Args.hasArg(OPT_resource_dir))
     args.push_back("-resource-dir=" + g_config->clang.resourceDir);
   if (!Args.hasArg(OPT_working_directory))

src/query_utils.h

@@ -110,30 +110,6 @@ void EachOccurrence(QueryDatabase* db,
 
 lsSymbolKind GetSymbolKind(QueryDatabase* db, SymbolIdx sym);
 
-template <typename Fn>
-void EachOccurrenceWithParent(QueryDatabase* db,
-                              SymbolIdx sym,
-                              bool include_decl,
-                              Fn&& fn) {
-  WithEntity(db, sym, [&](const auto& entity) {
-    lsSymbolKind parent_kind = lsSymbolKind::Unknown;
-    for (auto& def : entity.def)
-      if (def.spell) {
-        parent_kind = GetSymbolKind(db, sym);
-        break;
-      }
-    for (Use use : entity.uses)
-      fn(use, parent_kind);
-    if (include_decl) {
-      for (auto& def : entity.def)
-        if (def.spell)
-          fn(*def.spell, parent_kind);
-      for (Use use : entity.declarations)
-        fn(use, parent_kind);
-    }
-  });
-}
-
 template <typename Q, typename Fn>
 void EachDefinedEntity(std::unordered_map<Usr, Q>& collection,
                        const std::vector<Usr>& usrs,

src/threaded_queue.h

@@ -69,13 +69,11 @@ struct MultiQueueWaiter {
 template <class T>
 struct ThreadedQueue : public BaseThreadQueue {
  public:
-  ThreadedQueue() : total_count_(0) {
+  ThreadedQueue() {
     owned_waiter_ = std::make_unique<MultiQueueWaiter>();
     waiter_ = owned_waiter_.get();
   }
-
-  explicit ThreadedQueue(MultiQueueWaiter* waiter)
-      : total_count_(0), waiter_(waiter) {}
+  explicit ThreadedQueue(MultiQueueWaiter* waiter) : waiter_(waiter) {}
 
   // Returns the number of elements in the queue. This is lock-free.
   size_t Size() const { return total_count_; }
@@ -92,10 +90,6 @@ struct ThreadedQueue : public BaseThreadQueue {
     waiter_->cv.notify_one();
   }
 
-  void PushFront(T&& t, bool priority = false) {
-    Push<&std::deque<T>::push_front>(std::move(t), priority);
-  }
-
   void PushBack(T&& t, bool priority = false) {
     Push<&std::deque<T>::push_back>(std::move(t), priority);
   }
@@ -162,7 +156,7 @@ struct ThreadedQueue : public BaseThreadQueue {
 
   // Get the first element from the queue without blocking. Returns a null
   // value if the queue is empty.
-  std::optional<T> TryPopFrontHelper(int which) {
+  std::optional<T> TryPopFront() {
     std::lock_guard<std::mutex> lock(mutex_);
     auto execute = [&](std::deque<T>* q) {
       auto val = std::move(q->front());
@@ -170,35 +164,13 @@ struct ThreadedQueue : public BaseThreadQueue {
       --total_count_;
       return std::move(val);
     };
-    if (which & 2 && priority_.size())
-      return execute(&priority_);
-    if (which & 1 && queue_.size())
-      return execute(&queue_);
-    return std::nullopt;
-  }
-
-  std::optional<T> TryPopFront() { return TryPopFrontHelper(3); }
-
-  std::optional<T> TryPopBack() {
-    std::lock_guard<std::mutex> lock(mutex_);
-    auto execute = [&](std::deque<T>* q) {
-      auto val = std::move(q->back());
-      q->pop_back();
-      --total_count_;
-      return std::move(val);
-    };
-    // Reversed
-    if (queue_.size())
-      return execute(&queue_);
     if (priority_.size())
       return execute(&priority_);
+    if (queue_.size())
+      return execute(&queue_);
     return std::nullopt;
   }
 
-  std::optional<T> TryPopFrontLow() { return TryPopFrontHelper(1); }
-
-  std::optional<T> TryPopFrontHigh() { return TryPopFrontHelper(2); }
-
   template <typename Fn>
   void Iterate(Fn fn) {
     std::lock_guard<std::mutex> lock(mutex_);
@@ -211,7 +183,7 @@ struct ThreadedQueue : public BaseThreadQueue {
   mutable std::mutex mutex_;
 
  private:
-  std::atomic<int> total_count_;
+  std::atomic<int> total_count_{0};
   std::deque<T> priority_;
   std::deque<T> queue_;
   MultiQueueWaiter* waiter_;