FHIRPath+Date improvements

[lukaskollmer]

FHIRPath+Date improvements

♻️ Current situation & Problem

Currently, only Date values can be produced from a FHIRPath.

This is problematic since a path can express a time-only value, which cannot be represented in a good/sensible/correct way using a Date.

⚙️ Release Notes

• FHIRPath can now produce DateComponents values. Depending on the input (date/time/dateTime), an appropriate subset of the components is populated.
• Improvements to FHIRPath parsing when extracting Date/DateComponents values.

📚 Documentation

n/a

✅ Testing

yes

Code of Conduct & Contributing Guidelines

By creating and submitting this pull request, you agree to follow our Code of Conduct and Contributing Guidelines:

• I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov]

Codecov Report

❌ Patch coverage is 88.88889% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.87%. Comparing base (b56f6f2) to head (ea0652d).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
Sources/FHIRPathParser/DateTimeLiteralParser.swift	75.00%	2 Missing ⚠️
...ces/FHIRPathParser/DateComponents+Operations.swift	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #100      +/-   ##
==========================================
+ Coverage   83.87%   85.87%   +2.01%     
==========================================
  Files          28       29       +1     
  Lines         378      382       +4     
==========================================
+ Hits          317      328      +11     
+ Misses         61       54       -7     

Files with missing lines	Coverage Δ
Sources/FHIRPathParser/Date+FHIRPathValue.swift	100.00% <100.00%> (ø)
...rces/FHIRPathParser/DateExpressionEvaluation.swift	55.56% <100.00%> (+1.99%)	⬆️
Sources/FHIRPathParser/FHIRPathExpression.swift	100.00% <ø> (ø)
...IRPathParserTests/DateTimeLiteralParserTests.swift	100.00% <100.00%> (ø)
...ests/FHIRPathParserTests/FHIRPathParserTests.swift	100.00% <100.00%> (ø)
...ces/FHIRPathParser/DateComponents+Operations.swift	83.34% <75.00%> (-16.66%)	⬇️
Sources/FHIRPathParser/DateTimeLiteralParser.swift	81.49% <75.00%> (+0.72%)	⬆️

... and 1 file with indirect coverage changes

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