feat: Support empty structs

[ritchie46]

fixes #10234

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.25%. Comparing base (4157e92) to head (7d95b95).
Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18249      +/-   ##
==========================================
- Coverage   80.30%   80.25%   -0.05%     
==========================================
  Files        1498     1500       +2     
  Lines      198751   198881     +130     
  Branches     2833     2837       +4     
==========================================
+ Hits       159598   159604       +6     
- Misses      38626    38750     +124     
  Partials      527      527              

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