Function foreach

src/master/readonly_handler.cpp:216–223

  writer->field("completed_tasks", [this](JSON::ArrayWriter* writer) {
    foreach (const Owned<Task>& task, framework_->completedTasks) {
      // Skip unauthorized tasks.
      if (!approvers_->approved<VIEW_TASK>(*task, framework_->info)) {
        continue;
      }

      writer->element(*task);
    }
  });

  // Model all of the offers associated with a framework.