Gamma function

[steveklabnik]

Issue by stygstra
Friday Oct 24, 2014 at 02:44 GMT

For earlier discussion, see rust-lang/rust#18271

This issue was labelled with: A-libs in the Rust repository

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It would be nice if tgamma and lgamma_r were exposed via std::num::Float. The foreign function definitions for both are present in src/libstd/num/f{32,64}.rs, but they're not exposed in the standard library.

[robsmith11]

Any reason this isn't moving forward? The gamma function is commonly used in scientific computing so would be useful to have easy access.

[droundy]

I've got to say that this would certainly be convenient.

[Lokathor]

The Float trait doesn't even exist anymore.

most likely a path forward here is for someone to open a PR to add these methods directly to f32 and f64 behind a feature gate.

[kennytm]

you could import the libm package if you need the tgamma and lgamma_r functions.