Re: Extending Lua for multiple light userdata types

[Luiz Henrique de Figueiredo <lhf@...>]

> Anything based on floating-point equality deserves to fail.

This is a misconception. The problem is comparing floating-point numbers
for equality when they may come from different sources, say one is read
and the other is computed. You then indeed have to be careful.

Moreover, it's what Lua already provides: table indexing for floating-point
numbers based on equality.