Larry Wall wrote:

but probably what the financial insitutions
want is special fixed-point types that assume a divisor anyway.
Would any financial institution care to comment?
Some (VAT tax) computations are defined, by law, to be executed
with a cetain precision. You have to be able to control the precision
at any point during a computation.

The need for precision control may have a wider range. In the
EGNOS project, they used to define data types, represented as
binary integers of N (8, 16, 32, 40, 48, 64,...) bit with a manyfold
of interpretations for the value of the LSB, e.g. 0.01 meter, or
1/2**7 meter, or 1/2**16 seconds.



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