feat: add similarto keyword to build_function

[AayushSabharwal]

No description provided.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 8.88%. Comparing base (6202fa4) to head (7152f58).
Report is 74 commits behind head on master.

Files with missing lines	Patch %	Lines
src/build_function.jl	0.00%	2 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #1421      +/-   ##
=========================================
+ Coverage    3.95%   8.88%   +4.92%     
=========================================
  Files          51      51              
  Lines        4824    4873      +49     
=========================================
+ Hits          191     433     +242     
+ Misses       4633    4440     -193     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[ChrisRackauckas]

what's this used for?

[AayushSabharwal]

If MTK generates a function that takes MTKParameters as the first argument and returns an array, build_function tries to call SymbolicUtils.Code.create_array(::Type{<:MTKParameters}, ...) which errors. This makes it so those kinds of functions can explicitly say "create an Array".

[AayushSabharwal]

The only other alternative is force_SA = true which forces it to return a StaticArray and isn't always desirable.

[ChrisRackauckas]

We should document this argument then?

[AayushSabharwal]

Right, I'll add that.