push_internal(std::forward<U>(t)); } template<typename U> bool push_internal(U&& t)； 我这两个函数没写错把

&& t) { std::unique_lock<std::mutex> lock(m_mutex); if (m_queue.size() >= m_max_size) { return false; } m_queue.emplace(std::forward<U>(t)); m_condition_variable.notify_one(); return true; }

This is a template function called push_internal that takes a parameter of type U&&. It first locks a mutex, then checks if the size of the queue is greater than or equal to the maximum size. If it is, it returns false. Otherwise, it adds the parameter to the queue by calling emplace, and notifies any waiting threads that the queue is no longer empty. Finally, it returns true.

The use of std::forward allows the function to perfectly forward the parameter to emplace, preserving its value category (lvalue or rvalue) and avoiding unnecessary copies or moves.