How to understand "yield in c" at Lua 5.3 manual document

Subject: How to understand &quot;yield in c&quot; at Lua 5.3 manual document
From: Wangbo &lt;wangbo.red@ ... &gt;
Date: Wed, 16 Mar 2016 22:55:30 +0800

lua-l archive

It is difficult for me to read chapter "yield in c". especially API lua_yieldk, lua_callk and lua_pcallk

Can someone give me some code/scenario that need this function ? so i can debug it by gdb to study the implementation.

Follow-Ups:
- Re: How to understand "yield in c" at Lua 5.3 manual document, Nagaev Boris