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2018-03-13 22:33 GMT+02:00 Dibyendu Majumdar <mobile@majumdar.org.uk>:

> I don't interpret the manual that way. I read that as saying that you
> cannot modify the length operator for a string. But __len is defined
> as a length operation, is it not?

Now what makes you think that length must be an integer?

$ lua -l complex
Lua 5.3.4  Copyright (C) 1994-2017 Lua.org, PUC-Rio
> complex.__len = complex.abs
> #complex.new(3,4)
5.0