Improved handling of enter after { at beginning of lambda expressions that are arguments

src/source.cpp

@@ -2552,6 +2552,18 @@ bool Source::View::on_key_press_event_bracket_language(GdkEventKey *event) {
             scroll_to(get_buffer()->get_insert());
             return true;
           }
+          /**
+          * Handle pressing enter after '{' in special expressions like:
+          * test(2,
+          *      []() {
+          *        func();
+          *      });
+          */
+          else if(close_iter.get_line() > condition_iter.get_line() && close_iter.get_line_offset() == get_tabs_end_iter(condition_iter).get_line_offset()) {
+            get_buffer()->insert_at_cursor('\n' + get_line_before(get_tabs_end_iter(condition_iter)) + tab);
+            scroll_to(get_buffer()->get_insert());
+            return true;
+          }
         }
 
         // Check if one should add semicolon after '}'

tests/source_key_test.cpp

@@ -601,6 +601,22 @@ int main() {
       g_assert(buffer->get_insert()->get_iter().get_line() == 1);
       g_assert(buffer->get_insert()->get_iter().get_line_offset() == 17);
     }
+    {
+      buffer->set_text("  test(2,\n"
+                       "       []() {\n"
+                       "         func();\n"
+                       "       })\n");
+      auto iter = buffer->get_iter_at_line_offset(1, 13);
+      buffer->place_cursor(iter);
+      view.on_key_press_event(&event);
+      g_assert(buffer->get_text() == "  test(2,\n"
+                                     "       []() {\n"
+                                     "         \n"
+                                     "         func();\n"
+                                     "       })\n");
+      g_assert(buffer->get_insert()->get_iter().get_line() == 2);
+      g_assert(buffer->get_insert()->get_iter().get_line_offset() == 9);
+    }
 
     {
       buffer->set_text("  else");