How to write wrappers, when I have no information ...

# javascript

[turansky]

How to write wrappers, when I have no information about nullability of function parameters and result ?

[bashor]

turansky: the safest way is to treat parameters as not null and result as nullable

[turansky]

@bashor I mean how I can say, that I know nothing about nullability.
Possibly I can use symbol ! like in cases of Kotlin<->Java interoperability? Symbol ! in wrappers now marked as error.

In my case safest way, which you describe, will work bad. Redundant checks (for result) and nonnullable parameters, which really can be nullable will be a big problem.

[bashor]

@turansky feel free to create an issue .

[bashor]

And, please, add your usecases, examples

[turansky]

@bashor Which logic used in ts2kt? Safest, which you described above? Or you have some mechanics to calculate nullability?

[bashor]

Right now it use nullable information in d.ts, the behaviour is the same as in TypeScript 2.0 compiler with --strictNullChecks