Method top

3rd/asio-1.24.0/include/asio/detail/call_stack.hpp:105–109

Obtain the value at the top of the stack.

  // Obtain the value at the top of the stack.
  static Value* top()
  {
    context* elem = top_;
    return elem ? elem->value_ : 0;
  }

private:
  // The top of the stack of calls for the current thread.