Remove Quantity

[jonaskello]

I'm not sure why we need to export Quantity? It is only types that are exported. If you want to construct an amount I guess the Quantity type parameters is always infered from the unit:

const amount = Amount.create(10, Units.Meter);

What would be an example usage of Quantity as it is exported now?

[jonaskello]

It is needed to type input params:

function add(length1: Amount<Quantity.Length>, length2: Amount<Quantity.Length>) {
  ....
}

[jonaskello]

However when you are typing something like an amount, you can use Units to get the quantity type. This is becuase Units exports type for all quantities, and const for all units. So if you use Units.Foo where typescript expects a type, you will get the quantity type Foo. If you use Units.Foo where typescript expect an actual value, you will get the unit Foo.

So the above example can be written without Quantity like this:

function add(length1: Amount<Units.Length>, length2: Amount<Units.Length>) {
  ...
}