Lua - Count the no. of references to a table

问题

The Lua docs say

When a program has no references to a table left, Lua memory management will eventually delete the table and reuse its memory.

My question is : Is it possible to count the no of references to a particular table during runtime?

回答1:

You can find all references to a Lua value using the debug library. See these messages:

• http://lua-users.org/lists/lua-l/2012-03/msg00479.html
• http://lua-users.org/lists/lua-l/2012-04/msg00758.html

The luatraverse library found in the below link solves this nicely! http://code.matthewwild.co.uk/luatraverse/summary

来源：https://stackoverflow.com/questions/11366693/lua-count-the-no-of-references-to-a-table