元表的__index和__newindex命名吐槽~

› MoonScript

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Lua中一个奇怪的设计：
原始读索引是rawget(t, i)，原始写索引是rawset(t, k, v)。
元表的读索引却是__index，写索引是__newindex，这是什么命名，为什么不保持一致，就叫__getindex和__setindex？

1 replies • 1970-01-01 08:00:00 +08:00

middleware

May 27, 2013

Lua 5.2 document:
Note that the metamethod (__index) is tried only when key is not present in table.