Lua 5.3 (2015-01-12) added the bitwise operators:

https://www.lua.org/versions.html#5.3

https://www.lua.org/manual/5.3/manual.html#3.4.2

Looks like LuaJIT is catching up, but calling these "syntax extensions" is confusing. Is the intent to hold LuaJIT fixed against some earlier Lua version (I guess 5.1) and adopt newer syntax piecemeal?

I welcome the compound assignment operators. Playdate's version of Lua also has that extension.