CameLIGO: use `params` field when abstracting local types

E. Rivas requested to merge er433/fix/abstractor-type-in-params into dev

Motivation and Context

Reported by Melwyn, local types fail to bind params in CameLIGO.


This MR fixes the issue by treating the params field in a type declaration for CameLIGO's abstractor.

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • Performance improvement (non-breaking change that improves performance)
  • None (change with no changelog)



  • Changes follow the existing coding style (use dune @fmt to check).
  • Tests for the changes have been added (for bug fixes / feature).
  • Documentation has been updated.
  • Changelog description has been added (if appropriate).
  • Start titles under ## Changelog section with #### (if appropriate).
  • There is no image or uploaded file in changelog
  • Examples in changed behaviour have been added to the changelog (for breaking change / feature).
Edited by E. Rivas

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