dense.dot(sparse) impl

[pmarks]

This will be allowed on stable once rust-lang/rust#55437 is stabilized. Seem reasonable?

[vbarrielle]

That seems mostly reasonable yes, but I'm not sure I like the added genericity on csr_mulac_dense_rowmaj and the likes, I fear it may ask too many type annotations. Maybe it could be
better if Nout were equal to N1 by default.

[pmarks]

@vbarrielle this now will compile on stable. It's not possible to have default generic types on methods, so I'm not sure how to reduce the genericity of the csr_mulacc_dense_rowmaj methods.

Any thoughts on what we could do there?

[vbarrielle]

Hello, sorry for the delayed answer.

I think this added genericity is not too much of a problem, I however need to write a few examples to check if it's actually a breaking change for "typical" calls to csr_mulacc_dense_rowmaj (though I dont think it's called that much alone in the wild).

I hope I'll find the time to do it in the coming week.

[vbarrielle]

Hello @pmarks, I've rebased and updated your branch on the latest master, and merged it manually, I'm no longer worried about a possible breaking change as I'm going to bump to 0.8 for other changes as well.

I think I got the gist of your PR right, and tests look ok, but please tell me if I forgot something. After rebasing, I obtained the commits 896c7f2 and 10f42f0

[pmarks]

@vbarrielle very cool, thanks!!