[DRAFT] Migrate from paste

[justsmth]

Issues:

Addresses:

• paste - no longer maintained #722

Context

The paste crate is no longer maintained.

Description of changes:

Migrate use of "paste" to concat-idents.

Callouts

• Usage of the macros is nearly identical, except the constructed identity could not be used in another macro call to (e.g) stringify! or use_bindings!. Adjustments made accordingly.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.87%. Comparing base (c358484) to head (7c64225).
Report is 181 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #723      +/-   ##
==========================================
- Coverage   95.80%   92.87%   -2.93%     
==========================================
  Files          61       70       +9     
  Lines        8143     9566    +1423     
  Branches        0     9566    +9566     
==========================================
+ Hits         7801     8884    +1083     
- Misses        342      413      +71     
- Partials        0      269     +269     

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[jschwe]

concat_idents has not received any updates in 2 years and doesn't seem to be very popular either. I honestly think that migrating from paste to concat_idents would be a larger risk, since dependencies used in proc macros need to be trust worthy due to the lack of sandboxing.

[justsmth]

concat_idents has not received any updates in 2 years and doesn't seem to be very popular either. I honestly think that migrating from paste to concat_idents would be a larger risk, since dependencies used in proc macros need to be trust worthy due to the lack of sandboxing.

I agree. I attempted a migration, in part, to see how extensive our use of paste is and how hard it might be to replace. The best way to resolve this issue might be to write our own proc macro that provides some basic functionality.