Boost进程间message_queue具有非常量get_num_msg（）。 为什么？

Question

In boost 1.53 the message_queue_t has this member function:

size_type get_num_msg(); 

This returns the number of messages currently stored. Never throws. I don't see any reason why this can't be const.

Answer 1

原来，这是一个错误，已在Boost修订＃83470中修复。