boost::asio async_read vs async_receive

先看async_read：

This function is used to asynchronously read a certain number of bytes of data from a stream. The function call always returns immediately. The asynchronous operation will continue until one of the following conditions is true:

• The supplied buffers are full. That is, the bytes transferred is equal to the sum of the buffer sizes.
• An error occurred.

This operation is implemented in terms of zero or more calls to the stream's async_read_some function

手册上明显说明，函数在两种情况下会返回，要么缓冲区满要么出错，多好的一个函数啊！！！

下面看看悲催的async_receive：

This function is used to asynchronously receive data from the stream socket. The function call always returns immediately.

看到没，人家啥时候都是立即返回，有木有！这不是坑爹吗！

没收完你为神马还返回！有木有！

不看手册的程序员你伤不起啊，悲催啊……真想抽你丫的！

PS：各位广大的菜鸟级程序员兄弟姐妹啊，学东西一定要看手册啊，网上的博客不靠谱啊不靠谱，你伤不起呀伤不起！