[Jens Hedegaard Nielsen (jenshnielsen)]

Make parameter generic in data and instrument type. This enables significantly better introspection of qcodes instruments and their data returned from parameters.

This takes the core infrastructure changes from #7655 and breaks it out into a pr with clean commits. The instrument improvements will land independently. Consult that pr for examples of improvements.

• Changelog

[codecov]

Codecov Report

❌ Patch coverage is 30.13699% with 51 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.88%. Comparing base (d825f1b) to head (7025c17).
⚠️ Report is 133 commits behind head on main.

Files with missing lines	Patch %	Lines
src/qcodes/parameters/parameter_base.py	55.55%	16 Missing ⚠️
src/qcodes/parameters/delegate_parameter.py	8.33%	11 Missing ⚠️
src/qcodes/parameters/cache.py	10.00%	9 Missing ⚠️
src/qcodes/parameters/parameter.py	0.00%	5 Missing ⚠️
src/qcodes/parameters/parameter_with_setpoints.py	0.00%	4 Missing ⚠️
src/qcodes/parameters/array_parameter.py	0.00%	3 Missing ⚠️
src/qcodes/parameters/multi_parameter.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7730      +/-   ##
==========================================
- Coverage   59.89%   59.88%   -0.01%     
==========================================
  Files         352      352              
  Lines       31806    31843      +37     
==========================================
+ Hits        19051    19070      +19     
- Misses      12755    12773      +18     

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[Mikhail Astafev (astafan8)]

Even though the type system is not as powerful for supporting this feature, and the internals of qcodes are not as cleanly implemented, this is still probably a useful addition to make towards better typed driver code and hence measurement code, so let's give it a go by the users :)

[Jens Hedegaard Nielsen (jenshnielsen)]

Even though the type system is not as powerful for supporting this feature, and the internals of qcodes are not as cleanly implemented, this is still probably a useful addition to make towards better typed driver code and hence measurement code, so let's give it a go by the users :)

I think this undersells the feature a bit ;)

Consult #7822 for some of the improvements this gives.
such as being able to statically match on all possible values of a parameter: