Summary:
"Unannotated" is misleading and ambiguous concept, it can have different
meanings depending on agreements.
The current logic treats them as Nonnull, which is exactly what we want
to preserve.
(If we need to partially model some functions where we don't have
opinion on some of types in the signature, we can explicitly model
unknown nullability later on).
Note that I am not aiming for substantial refactoring of
modelsTables.ml; the scope of this diff is merely to clarify things.
Reviewed By: ngorogiannis
Differential Revision: D17449347
fbshipit-source-id: 43c798ce7
Summary:
`Present` annotation was an experiment made many years ago that never
got into real usage. The idea was to annotate Optional<> types with
Present, which means that it is safe to call get().
We don't plan to support `Present` annotation for optional types in the
near future.
Support of `Present` annotation requires extra levels of abstraction
that make the changing the behavior and introducing new features harder.
A lot of checks for nullability are written in generic way so they also
check for presense.
Getting rid of that will allow us to simplify our
work for introducing new semantics for nullsafe.
Reviewed By: ngorogiannis
Differential Revision: D17153432
fbshipit-source-id: c5ea9bdf1
Summary: Moving all the files related to nullable type checking under the same directory. The goal is to merge everything into the same backend based on the AI framework and access expressions.
Reviewed By: ngorogiannis
Differential Revision: D13350880
fbshipit-source-id: 8ab3cf81b
Mitya Lyubarskiy
Josh Berdine
Jeremy Dubreil
Wenzhe Lu
Boris Valkov