If clang >= 8, delete search path detection and use Sema::CodeCompleteIncludedFile

src/clang_complete.cc

@@ -143,13 +143,6 @@ struct PreambleData {
 };
 
 namespace {
-
-std::string StripFileType(const std::string &path) {
-  SmallString<128> Ret;
-  sys::path::append(Ret, sys::path::parent_path(path), sys::path::stem(path));
-  return sys::path::convert_to_slash(Ret);
-}
-
 bool LocationInRange(SourceLocation L, CharSourceRange R,
                      const SourceManager &M) {
   assert(R.isCharRange());
@@ -272,23 +265,16 @@ public:
 std::unique_ptr<CompilerInstance> BuildCompilerInstance(
     CompletionSession &session, std::unique_ptr<CompilerInvocation> CI,
     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS, DiagnosticConsumer &DC,
-    const PreambleData *preamble, const WorkingFiles::Snapshot &snapshot,
-    std::vector<std::unique_ptr<llvm::MemoryBuffer>> &Bufs) {
-  std::string main = ResolveIfRelative(
-      session.file.directory,
-      sys::path::convert_to_slash(CI->getFrontendOpts().Inputs[0].getFile()));
-  for (auto &file : snapshot.files) {
-    Bufs.push_back(llvm::MemoryBuffer::getMemBuffer(file.content));
-    if (preamble && file.filename == main) {
+    const PreambleData *preamble, const std::string &path,
+    std::unique_ptr<llvm::MemoryBuffer> &Buf) {
+  if (preamble) {
 #if LLVM_VERSION_MAJOR >= 7
-      preamble->Preamble.OverridePreamble(*CI, FS, Bufs.back().get());
+    preamble->Preamble.OverridePreamble(*CI, FS, Buf.get());
 #else
-      preamble->Preamble.AddImplicitPreamble(*CI, FS, Bufs.back().get());
+    preamble->Preamble.AddImplicitPreamble(*CI, FS, Buf.get());
 #endif
-      continue;
-    }
-    CI->getPreprocessorOpts().addRemappedFile(file.filename,
-      Bufs.back().get());
+  } else {
+    CI->getPreprocessorOpts().addRemappedFile(path, Buf.get());
   }
 
   auto Clang = std::make_unique<CompilerInstance>(session.PCH);
@@ -358,8 +344,6 @@ void *CompletionPreloadMain(void *manager_) {
       continue;
 
     const auto &args = session->file.args;
-    WorkingFiles::Snapshot snapshot =
-        session->wfiles->AsSnapshot({StripFileType(session->file.filename)});
     auto stat_cache = std::make_unique<PreambleStatCache>();
     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS =
         stat_cache->Producer(session->FS);
@@ -415,18 +399,23 @@ void *CompletionMain(void *manager_) {
     CI->getLangOpts()->CommentOpts.ParseAllComments = true;
 
     DiagnosticConsumer DC;
-    WorkingFiles::Snapshot snapshot =
-        manager->wfiles_->AsSnapshot({StripFileType(path)});
-    std::vector<std::unique_ptr<llvm::MemoryBuffer>> Bufs;
+    std::string content = manager->wfiles_->GetContent(path);
+    auto Buf = llvm::MemoryBuffer::getMemBuffer(content);
+    bool in_preamble =
+        GetOffsetForPosition(
+            {request->position.line, request->position.character}, content) <
+        ComputePreambleBounds(*CI->getLangOpts(), Buf.get(), 0).Size;
+    if (in_preamble)
+      preamble.reset();
     auto Clang = BuildCompilerInstance(*session, std::move(CI), FS, DC,
-                                       preamble.get(), snapshot, Bufs);
+                                       preamble.get(), path, Buf);
     if (!Clang)
       continue;
 
+    Clang->getPreprocessorOpts().SingleFileParseMode = in_preamble;
     Clang->setCodeCompletionConsumer(request->Consumer.release());
     if (!Parse(*Clang))
       continue;
-    for (auto &Buf : Bufs)
     Buf.release();
 
     request->on_complete(&Clang->getCodeCompletionConsumer());
@@ -482,6 +471,7 @@ void *DiagnosticMain(void *manager_) {
     std::shared_ptr<PreambleData> preamble = session->GetPreamble();
     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS =
         preamble ? preamble->stat_cache->Consumer(session->FS) : session->FS;
+
     std::unique_ptr<CompilerInvocation> CI =
         BuildCompilerInvocation(session->file.args, FS);
     if (!CI)
@@ -489,16 +479,14 @@ void *DiagnosticMain(void *manager_) {
     CI->getDiagnosticOpts().IgnoreWarnings = false;
     CI->getLangOpts()->SpellChecking = g_config->diagnostics.spellChecking;
     StoreDiags DC(path);
-    WorkingFiles::Snapshot snapshot =
-        manager->wfiles_->AsSnapshot({StripFileType(path)});
-    std::vector<std::unique_ptr<llvm::MemoryBuffer>> Bufs;
+    std::string content = manager->wfiles_->GetContent(path);
+    auto Buf = llvm::MemoryBuffer::getMemBuffer(content);
     auto Clang = BuildCompilerInstance(*session, std::move(CI), FS, DC,
-                                       preamble.get(), snapshot, Bufs);
+                                       preamble.get(), path, Buf);
     if (!Clang)
       continue;
     if (!Parse(*Clang))
       continue;
-    for (auto &Buf : Bufs)
     Buf.release();
 
     auto Fill = [](const DiagBase &d, Diagnostic &ret) {

src/include_complete.cc

@@ -104,7 +104,7 @@ IncludeComplete::IncludeComplete(Project *project)
     : is_scanning(false), project_(project) {}
 
 void IncludeComplete::Rescan() {
-  if (is_scanning)
+  if (is_scanning || LLVM_VERSION_MAJOR >= 8)
     return;
 
   completion_items.clear();

src/messages/textDocument_completion.cc

@@ -24,7 +24,9 @@ limitations under the License.
 #include <clang/Sema/CodeCompleteConsumer.h>
 #include <clang/Sema/Sema.h>
 
+#if LLVM_VERSION_MAJOR < 8
 #include <regex>
+#endif
 
 namespace ccls {
 using namespace clang;
@@ -43,6 +45,7 @@ struct CompletionList {
 };
 MAKE_REFLECT_STRUCT(CompletionList, isIncomplete, items);
 
+#if LLVM_VERSION_MAJOR < 8
 void DecorateIncludePaths(const std::smatch &match,
                           std::vector<CompletionItem> *items) {
   std::string spaces_after_include = " ";
@@ -90,6 +93,7 @@ ParseIncludeLineResult ParseIncludeLine(const std::string &line) {
   bool ok = std::regex_match(line, match, pattern);
   return {ok, match[3], match[5], match[6], match};
 }
+#endif
 
 // Pre-filters completion responses before sending to vscode. This results in a
 // significantly snappier completion experience as vscode is easily overloaded
@@ -121,7 +125,7 @@ void FilterCandidates(CompletionList &result, const std::string &complete_text,
     for (auto &item : items) {
       item.textEdit.range = lsRange{begin_pos, end_pos};
       if (has_open_paren && item.filterText)
-        item.textEdit.newText = item.filterText.value();
+        item.textEdit.newText = *item.filterText;
       // https://github.com/Microsoft/language-server-protocol/issues/543
       // Order of textEdit and additionalTextEdits is unspecified.
       auto &edits = item.additionalTextEdits;
@@ -133,7 +137,7 @@ void FilterCandidates(CompletionList &result, const std::string &complete_text,
           item.filterText =
               buffer_line.substr(start.character,
                                  end.character - start.character) +
-              item.filterText.value();
+              *item.filterText;
         }
         edits.erase(edits.begin());
       }
@@ -391,6 +395,10 @@ public:
           includeBriefComments());
       CompletionItem ls_item;
       ls_item.kind = GetCompletionKind(R.CursorKind);
+#if LLVM_VERSION_MAJOR >= 8
+      if (Context.getKind() == CodeCompletionContext::CCC_IncludedFile)
+        ls_item.kind = CompletionItemKind::File;
+#endif
       if (const char *brief = CCS->getBriefComment())
         ls_item.documentation = brief;
       ls_item.detail = CCS->getParentContextName().str();
@@ -443,51 +451,44 @@ void MessageHandler::textDocument_completion(CompletionParam &param,
       param.position.line < file->buffer_lines.size())
     buffer_line = file->buffer_lines[param.position.line];
 
-  // Check for - and : before completing -> or ::, since vscode does not
-  // support multi-character trigger characters.
+  clang::CodeCompleteOptions CCOpts;
+  CCOpts.IncludeBriefComments = true;
+  CCOpts.IncludeCodePatterns = StringRef(buffer_line).ltrim().startswith("#");
+#if LLVM_VERSION_MAJOR >= 7
+  CCOpts.IncludeFixIts = true;
+#endif
+  CCOpts.IncludeMacros = true;
+
   if (param.context.triggerKind == CompletionTriggerKind::TriggerCharacter &&
       param.context.triggerCharacter) {
-    bool did_fail_check = false;
-
-    std::string character = *param.context.triggerCharacter;
-    int preceding_index = param.position.character - 2;
-
-    // If the character is '"', '<' or '/', make sure that the line starts
-    // with '#'.
-    if (character == "\"" || character == "<" || character == "/") {
-      size_t i = 0;
-      while (i < buffer_line.size() && isspace(buffer_line[i]))
-        ++i;
-      if (i >= buffer_line.size() || buffer_line[i] != '#')
-        did_fail_check = true;
+    bool ok = true;
+    int col = param.position.character - 2;
+    switch ((*param.context.triggerCharacter)[0]) {
+    case '"':
+    case '/':
+    case '<':
+      ok = CCOpts.IncludeCodePatterns; // start with #
+      break;
+    case ':':
+      ok = col >= 0 && buffer_line[col] == ':'; // ::
+      break;
+    case '>':
+      ok = col >= 0 && buffer_line[col] == '-'; // ->
+      break;
     }
-    // If the character is > or : and we are at the start of the line, do not
-    // show completion results.
-    else if ((character == ">" || character == ":") && preceding_index < 0) {
-      did_fail_check = true;
-    }
-    // If the character is > but - does not preced it, or if it is : and :
-    // does not preced it, do not show completion results.
-    else if (preceding_index >= 0 &&
-             preceding_index < (int)buffer_line.size()) {
-      char preceding = buffer_line[preceding_index];
-      did_fail_check = (preceding != '-' && character == ">") ||
-                       (preceding != ':' && character == ":");
-    }
-
-    if (did_fail_check) {
+    if (!ok) {
       reply(result);
       return;
     }
   }
 
-  std::string completion_text;
+  std::string filter;
   Position end_pos = param.position;
-  Position begin_pos = file->FindStableCompletionSource(
-      param.position, &completion_text, &end_pos);
+  Position begin_pos =
+      file->FindStableCompletionSource(param.position, &filter, &end_pos);
 
+#if LLVM_VERSION_MAJOR < 8
   ParseIncludeLineResult preprocess = ParseIncludeLine(buffer_line);
-
   if (preprocess.ok && preprocess.keyword.compare("include") == 0) {
     CompletionList result;
     {
@@ -506,10 +507,12 @@ void MessageHandler::textDocument_completion(CompletionParam &param,
                      buffer_line);
     DecorateIncludePaths(preprocess.match, &result.items);
     reply(result);
-  } else {
-    std::string path = param.textDocument.uri.GetPath();
+    return;
+  }
+#endif
+
   CompletionManager::OnComplete callback =
-        [completion_text, path, begin_pos, end_pos, reply,
+      [filter, path, begin_pos, end_pos, reply,
        buffer_line](CodeCompleteConsumer *OptConsumer) {
         if (!OptConsumer)
           return;
@@ -517,8 +520,7 @@ void MessageHandler::textDocument_completion(CompletionParam &param,
         CompletionList result;
         result.items = Consumer->ls_items;
 
-          FilterCandidates(result, completion_text, begin_pos, end_pos,
-                           buffer_line);
+        FilterCandidates(result, filter, begin_pos, end_pos, buffer_line);
         reply(result);
         if (!Consumer->from_cache) {
           cache.WithLock([&]() {
@@ -529,13 +531,6 @@ void MessageHandler::textDocument_completion(CompletionParam &param,
         }
       };
 
-    clang::CodeCompleteOptions CCOpts;
-    CCOpts.IncludeBriefComments = true;
-    CCOpts.IncludeCodePatterns = preprocess.ok; // if there is a #
-#if LLVM_VERSION_MAJOR >= 7
-    CCOpts.IncludeFixIts = true;
-#endif
-    CCOpts.IncludeMacros = true;
   if (cache.IsCacheValid(path, begin_pos)) {
     CompletionConsumer Consumer(CCOpts, true);
     cache.WithLock([&]() { Consumer.ls_items = cache.result; });
@@ -547,6 +542,5 @@ void MessageHandler::textDocument_completion(CompletionParam &param,
             std::make_unique<CompletionConsumer>(CCOpts, false), CCOpts,
             callback));
   }
-  }
 }
 } // namespace ccls

src/project.cc

@@ -141,6 +141,7 @@ struct ProjectProcessor {
     }
     args.push_back(Intern("-working-directory=" + entry.directory));
     entry.args = args;
+#if LLVM_VERSION_MAJOR < 8
     args.push_back("-fsyntax-only");
     if (!command_set.insert(hash).second)
       return;
@@ -191,6 +192,7 @@ struct ProjectProcessor {
         break;
       }
     }
+#endif
   }
 };