More tests #6
Description
Currently there's enough tests for expression-level things, but just a few to cover declarations and especially type-level syntax. On top of that, most tests focus on specific syntax nodes rather on how well they cooperate with each other, which has led to unnoticed bugs in the past. Hence,
TODO:
- More tests for type-level syntax
- Tests for nodes which include precedence, conflicts and recursive
choice()hacks