science-constants-dimensional

Mathematical/physical/chemical constants

Latest on Hackage:

0.1.0.3

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

BSD-3-Clause licensed and maintained by Anton Vorontsov

Science.Constants.Dimensional is a variant of Science.Constants[1] package, with the only difference is that that the dimensional flavor provides (where applicable) dimensionally-typed constants. The Numeric.Units.Dimensional[2] wrappers allow to write type-safe formulas, for example all of this will successfully type-check:

~$ ghci -XNoImplicitPrelude
λ= import Numeric.Units.Dimensional.Prelude

λ= import Science.Constants.Dimensional

λ= massOfProton + massOfElectron

1.673532715291e-27 kg
λ= massOfProton / massOfElectron

1836.1526719486646

But this will not:

λ= massOfProton / massOfElectron + planckConstant

<interactive>:10:14:
    Couldn't match type `Numeric.NumType.Pos
                           (Numeric.NumType.Pos Numeric.NumType.Zero)'
                  with `Numeric.NumType.Zero'

1: https://hackage.haskell.org/package/science-constants
2: https://hackage.haskell.org/package/dimensional