Fixed intentation after "if constexpr" and "else if constexpr"

src/source.cc

@@ -1827,8 +1827,8 @@ bool Source::View::on_key_press_event_basic(GdkEventKey* key) {
 
 //Bracket language indentation
 bool Source::View::on_key_press_event_bracket_language(GdkEventKey* key) {
-  const static std::regex no_bracket_statement_regex("^ *(if|for|while) *\\(.*[^;}{] *$|"
+  const static std::regex no_bracket_statement_regex("^ *(if( +constexpr)?|for|while) *\\(.*[^;}{] *$|"
-                                                     "^[}]? *else if *\\(.*[^;}{] *$|"
+                                                     "^[}]? *else if( +constexpr)? *\\(.*[^;}{] *$|"
                                                      "^[}]? *else *$", std::regex::extended);
 
   auto iter=get_buffer()->get_insert()->get_iter();

tests/source_key_test.cc

@@ -317,6 +317,13 @@ int main() {
                                                 "    ");
       g_assert(view.get_buffer()->get_insert()->get_iter() == view.get_buffer()->end());
     }
+    {
+      view.get_buffer()->set_text("  else if constexpr(true)");
+      view.on_key_press_event(&event);
+      g_assert(view.get_buffer()->get_text() == "  else if constexpr(true)\n"
+                                                "    ");
+      g_assert(view.get_buffer()->get_insert()->get_iter() == view.get_buffer()->end());
+    }
     {
       view.get_buffer()->set_text("  } else if(true)//comment");
       while(Gtk::Main::events_pending())
@@ -386,6 +393,15 @@ int main() {
                                                 "    ");
       g_assert(view.get_buffer()->get_insert()->get_iter() == view.get_buffer()->end());
     }
+    {
+      view.get_buffer()->set_text("  if constexpr(true &&\n"
+                                  "     false)");
+      view.on_key_press_event(&event);
+      g_assert(view.get_buffer()->get_text() == "  if constexpr(true &&\n"
+                                                "     false)\n"
+                                                "    ");
+      g_assert(view.get_buffer()->get_insert()->get_iter() == view.get_buffer()->end());
+    }
     {
       view.get_buffer()->set_text("  if(true &&\n"
                                   "     false) {");