Func resolver

[yliuuuu]

Relevant Issues

• [Closes/Related To] Issue #XXX

Description

• Changed Function Match logic.

  • Previously we assumed that if all the args require coercion to match the function signature, then the function match should failed, as there should be another function signature that requires no coercion. Such transitive coercion model is not correct.
  • Change the matching logic to gather all possible candidate, then sort them first based on number of coercion and then the function Precedence.

• Also, added the constrained decimal as a valid numeric type when generating function signature.

Other Information

• Updated Unreleased Section in CHANGELOG: [YES/NO]

  • Yes.

• Any backward-incompatible changes? [YES/NO]

  • No API changes.

• Any new external dependencies? [YES/NO]

  • < If YES, which ones and why? >
  • < In addition, please also mention any other alternatives you've considered and the reason they've been discarded >
  • No.

• Do your changes comply with the Contributing Guidelines
  and Code Style Guidelines? [YES/NO]
  Yes.

License Information

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

Conformance comparison report

	Base (c3b6e66)	ae29916	+/-
% Passing	92.54%	92.54%	0.00%
✅ Passing	5384	5384	0
❌ Failing	434	434	0
🔶 Ignored	0	0	0
Total Tests	5818	5818	0

Number passing in both: 5384

Number failing in both: 434

Number passing in Base (c3b6e66) but now fail: 0

Number failing in Base (c3b6e66) but now pass: 0

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.15%. Comparing base (c3b6e66) to head (57e41b1).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1378   +/-   ##
=========================================
  Coverage     72.15%   72.15%           
  Complexity     2095     2095           
=========================================
  Files           221      221           
  Lines         15984    15984           
  Branches       2896     2896           
=========================================
  Hits          11534    11534           
  Misses         3641     3641           
  Partials        809      809           

Flag	Coverage Δ
CLI	11.86% <ø> (ø)
EXAMPLES	80.28% <ø> (ø)
LANG	80.78% <ø> (ø)

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