Wouter van Ooijen wrote:

>> Doesn't really count for a "language" in some senses of the word, but
>> MathCAD (and probably all the other better math packages) handle units.
> 
> I does count as a language, but AFAIK it is interpreted, which removes
> most of the implementation challenges. 

Why is that? Isn't an interpreter more challenging than a compiler, in the
sense that the interpreter can do everything the compiler can, but not vice
versa? Or is it the optimization of this that is the challenge?

Gerhard
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