Decimal Integer Type

[bearophile]

Lawrence Dol:
> "Native" was a bad choice of words; I meant built into D, like int, long, etc.

int, long, are built-in in the language. But I think what you ask for is better in the std lib (and if present it must follow IEEE 854 exactly).
Note that Python has such module (written in C) in the std lib:
http://docs.python.org/lib/module-decimal.html

Bye,
bearophile