Add interface method for defining functions for expression handling

lightsheet-team / lightsheet

GNU Lesser General Public License v3.0

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Closed Fluglow closed 5 months ago

Fluglow commented 5 months ago

Closes #123 , based on changes in #121

Add static LightSheet.registerFunction method for defining functions applied in expression parsing
Inject CellReference parameter into all custom function calls from mathjs to allow accessing the sheet within the custom function
- See tests for examples of defining custom functions