Add custom adaptor tutorial example

[tcbrindle]

No description provided.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (0440cdc) 97.70% compared to head (51e07ce) 97.70%.

Additional details and impacted files

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  Coverage   97.70%   97.70%           
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  Files          62       62           
  Lines        2045     2045           
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  Hits         1998     1998           
  Misses         47       47           

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[tcbrindle]

@jnytra If you can, would you mind looking through this tutorial/example and letting me know if anything is unclear or doesn't make sense?

[jnytra]

This is absolutely amazing. This is exactly what I needed to write a new adaptor. I don't have any comments yet, but I plan to write a new adaptor according to this tutorial, so I'll see.

[tcbrindle]

This is absolutely amazing. This is exactly what I needed to write a new adaptor. I don't have any comments yet, but I plan to write a new adaptor according to this tutorial, so I'll see.

@jnytra Sounds good! If you're planning to add any new adaptors or algorithms please file an issue first (I'll mark it as an enhancement and assign you to "fix" it) so that we don't end up working on the same thing :)

[nwad123]

Change to struct flux_sequence_traits : flux::default_sequence_traits {

[nwad123]

This tutorial is great, it's exactly what I needed to get started. One issue I ran into is that repeat_elements_adaptor::flux_sequence_traits doesn't inherit from flux::default_sequence_traits which prevented the example from building. Changing line 133 from:

struct flux_sequence_traits {

to

struct flux_sequence_traits : flux::default_sequence_traits {

resolves the issue. I can't add a commit to this pr, but I didn't think that this change warranted a completely new pull request. Thanks again for the tutorial!