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From: David Abrahams (dave_at_[hidden])
Date: 2003-10-15 12:57:17

David Richardson wrote:

> Deane Yang wrote:
>> c) Automatic generation of new types when two different quantities
>> are multiplied or divided
> I'm a bit confused how this would work (maybe because I've been thinking
> about this as a physics problem). Do we just pick an arbtrary rule for
> the production of new types/units?

No, mathematics gives the rules. You can see examples in my slides at

> Then the users have to know that rule, or they might accidentaly specify
> a unit that corresponds to the multiplication of two other units without
> knowing (or intending) to do it.

The whole point of dimensional analysis in C++ is to statically check
these things.

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