log10

[probablykasper]

Currently using decimal, but would love to switch to rust-decimal. The only thing (hopefully) preventing that is log10 support.

For reference, this is decNumber's log10 implementation: https://github.com/gcc-mirror/gcc/blob/16e2427f50c208dfe07d07f18009969502c25dc8/libdecnumber/decNumber.c#L1358-L1523

[jumbojets]

If you can put up with an unoptimized solution, you could use the property log10(x) = ln(x) / ln(10) in the meantime until they implement an native solution. Perhaps it is by design that they don't have support for log10-- I don't know, as I am not affiliated with this project.

fn log10(x: Decimal) -> Decimal {
        x.ln() / dec!(10).ln()
}

Edit: unclear wording

[probablykasper]

@jamesetaylor3 Ah cool, had no idea it works like that! Will try that out, thanks

[paupino]

Hi both! log10 hasn't intentionally been left out of the library - it's just that it hasn't been implemented yet.
Some other solutions such as #389 would also benefit from this implementation. Consequently, I'll keep this ticket open as a feature request. We'll see if we can get an implementation of some sort in there within the next minor release or two.