Feature/nullish coalescing#866

Merged

Perryvw merged 2 commits intomasterfrom

feature/nullish-coalescing

May 9, 2020

Commits on May 7, 2020

Early null-coalescing
Perryvw
committed

Commits on May 9, 2020

Fixed type predicate, added tests for side effects
Perryvw
committed