Pavel Yaskevich e5b63fa16c [ConstraintSystem] NFC: Unify type variable and disjunction choice representation ...

Introduce `TypeBinding` interface with a single `attempt` method
which is useful to encapsulate specific binding logic used for
attempting disjunction choices and type variable bindings under
a single interface. This makes it easier to unify top-level logic
responsible for binding enumeration.

It should also make it possible to introduce unified binding producer
interface in the future.

2018-09-03 23:27:41 -07:00

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