C/C++: corrected reparse after autocomplete error

src/autocomplete.cpp

@@ -76,11 +76,13 @@ void Autocomplete::run() {
         return;
       stop_parse();
 
-      auto &buffer_raw = const_cast<std::string &>(buffer.raw());
       rows.clear();
-      add_rows(buffer_raw, line_nr, column_nr);
+      auto &buffer_raw = const_cast<std::string &>(buffer.raw());
+      bool success = add_rows(buffer_raw, line_nr, column_nr);
+      if(!is_processing())
+        return;
 
-      if(is_processing()) {
+      if(success) {
         dispatcher.post([this]() {
           after_add_rows();
           if(state == State::restarting) {

src/autocomplete.hpp

@@ -42,8 +42,8 @@ public:
   std::function<void()> after_add_rows = [] {};
   std::function<void()> on_add_rows_error = [] {};
 
-  /// The handler is not run in the main loop.
+  /// The handler is not run in the main loop. Should return false on error.
-  std::function<void(std::string &buffer, int line_number, int column)> add_rows = [](std::string &, int, int) {};
+  std::function<bool(std::string &buffer, int line_number, int column)> add_rows = [](std::string &, int, int) { return true; };
 
   std::function<void()> on_show = [] {};
   std::function<void()> on_hide = [] {};

src/source_clang.cpp

@@ -919,11 +919,8 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
     if(this->language && (this->language->get_id() == "chdr" || this->language->get_id() == "cpphdr"))
       clangmm::remove_include_guard(buffer);
     code_complete_results = std::make_unique<clangmm::CodeCompleteResults>(clang_tu->get_code_completions(buffer, line_number, column));
-    if(!code_complete_results->cx_results) {
+    if(!code_complete_results->cx_results)
-      auto expected = ParseState::processing;
+      return false;
-      parse_state.compare_exchange_strong(expected, ParseState::restarting);
-      return;
-    }
 
     if(autocomplete.state == Autocomplete::State::starting) {
       std::string prefix;
@@ -1011,6 +1008,7 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
         }
       }
     }
+    return true;
   };
 
   autocomplete.on_show = [this] {

src/source_generic.cpp

@@ -245,11 +245,6 @@ void Source::GenericView::setup_autocomplete() {
       update_status_state(this);
   };
 
-  autocomplete.on_add_rows_error = [this] {
-    autocomplete_comment.clear();
-    autocomplete_insert.clear();
-  };
-
   autocomplete.add_rows = [this](std::string &buffer, int line_number, int column) {
     if(autocomplete.state == Autocomplete::State::starting) {
       autocomplete_comment.clear();
@@ -290,6 +285,7 @@ void Source::GenericView::setup_autocomplete() {
         }
       }
     }
+    return true;
   };
 
   autocomplete.on_show = [this] {

src/source_language_protocol.cpp

@@ -1526,17 +1526,13 @@ void Source::LanguageProtocolView::setup_autocomplete() {
       update_status_state(this);
   };
 
-  autocomplete->on_add_rows_error = [this] {
-    autocomplete_rows.clear();
-  };
-
   autocomplete->add_rows = [this](std::string &buffer, int line_number, int column) {
     if(autocomplete->state == Autocomplete::State::starting) {
       autocomplete_rows.clear();
       std::promise<void> result_processed;
       if(autocomplete_show_arguments) {
         if(!capabilities.signature_help)
-          return;
+          return true;
         dispatcher.post([this, line_number, column, &result_processed] {
           // Find current parameter number and previously used named parameters
           unsigned current_parameter_position = 0;
@@ -1681,6 +1677,7 @@ void Source::LanguageProtocolView::setup_autocomplete() {
       }
       result_processed.get_future().get();
     }
+    return true;
   };
 
   autocomplete->on_show = [this] {