No documentation for construction functions (Luma, Rgb..)

[Ploppz]

Reading this, I noticed *pixel = image::Luma([i as u8]);.

The Luma function (and probably for other pixel types), isn't documented (or I can't find it). It should probably be documented.

[nwin]

Originally this was a 1-tuple, I wonder why this construct still works. Does anybody has an idea?

[philipc]

It's a function defined at https://github.com/PistonDevelopers/image/blob/bc8b8e5b34ab6b9c6caee7ba60a77451631411fc/src/color.rs#L68.

[nwin]

Seems like a bug in rustdoc then. The functions don't appear in the docs.

[nwin]

I created an issue rust-lang/rust#37342. The documentation actually exists but is not linked.

[birktj]

It seems like these functions do longer exists, so I am closing this issue.

[HeroicKatora]

Also, they are back to a 1-tuple again :)