Implement std::iter::{Sum, Product}

[termoshtt]

Resolve #3

• Implement Sum<Complex<T>> and Sum<&Complex<T>> using Zero + AddAssign
• Implement Product<Complex<T>> and Product<&Complex<T>> using One + MulAssign

Num and NumAssign are used for type constraint.

[termoshtt]

error: no associated item named `new` found for type `std::collections::hash_map::DefaultHasher` in the current scope
    --> src/lib.rs:1162:22
     |
1162 |     let mut hasher = <RandomState as BuildHasher>::Hasher::new();
     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I met this error with 1.12.0. I will use 1.14.0 like #7

[cuviper]

Thanks - I'll need to hold this PR until I'm ready to make breaking changes.

[termoshtt]

I see the num-complex 0.2 milestone, where these two issues are listed. Is there another issue to be included in num-complex 0.2 ?

[cuviper]

Maybe also #6 for no_std, after rust-num/num-traits#16.

[termoshtt]

I guess the no_std feature of num-traits will take a long time...
IMHO, we bump up version to 0.2 with the current two issues, and postpone the no_std feature to 0.3. What do you think about it?

[cuviper]

I'd rather work it out and bump only once in a long while.

[cuviper]

Rebased, then I made it use folds instead. Thanks for the PR!

bors r+

[bors]

Build succeeded

• continuous-integration/travis-ci/push