I'm currently writing a lot of math code and I came up with this little #dartlang extension type. I'm not yet sure if it's a good idea. It seems useful — but it could also be one of those overengineered ideas that I sometimes produce for no reason at all.

The idea is simply to encode, in static extension types, that a value is normalized (or that a function _expects_ a normalized value).

https://gist.github.com/filiph/2f1deca67a28af32c052860078e6f86a

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