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Technically, to be 100% compatible, this should be calling through a metatable assigned to all strings which has __index pointing to the string global table. This intermediate approach works for all sane use cases without requiring so much work. (It is not possible to *set* a metatable on a string in PUC-Lua, but it is at least possible to call `getmetatable` on a string and then mess with it.)
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Technically, to be 100% compatible, this should be calling through a metatable assigned to all strings which has __index pointing to the string global table. This intermediate approach works for all sane use cases without requiring so much work. (It is not possible to set a metatable on a string in PUC-Lua, but it is at least possible to call
getmetatableon a string and then mess with it.)