Method push

async_simple/util/Queue.h:40–46

requires std::is_move_assignable_v<T> class Queue {
public:
    void push(T &&item) {
        {
            std::scoped_lock guard(_mutex);
            _queue.push(std::move(item));
        }
        _cond.notify_one();
    }

    bool try_push(const T &item) {
        {