[#774] Add typechecking and better errors for sapling
Description
Problem: There is no support for the sapling
feature, which results in
poor user experience, particularly because parsing a contract with sapling
types will result in an error that's very unclear.
Solution: Add some supports for sapling (typechecking and better error messages), update the tests.
Related issue(s)
Resolves #774 (closed)
✅ Checklist for your Merge Request
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Tests (see short guidelines)
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If I added new functionality, I added tests covering it. -
If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
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Documentation
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My code complies with the style guide.
Edited by Moremi Vannak