Why can't this be inferred from usage? I have two extension functions: ```inline fun <T> Coll...

# getting-started

[Michael de Kaste]

Why can't this be inferred from usage?

I have two extension functions:

inline fun <T> Collection<T>.associateByPeriod(keySelector: (T) -> Period<LocalDate>): LocalDatePeriodMap<T?> = ...
inline fun <T> Collection<T>.associateByPeriod(keySelector: (T) -> Period<LocalDateTime>): LocalDateTimePeriodMap<T?> = ...

now somewhere in my code I am doing

list.associateByPeriod{ it.period } //period being a Period<LocalDateTime>

now I still get the exception

Overload resolution ambiguity. All these functions match.

but the first one can't match because of typing.

am I forced to make different function names for each periodMap?

[Youssef Shoaib [MOD]]

You need to annotate one of the functions at least with @OverloadResolutionByLambdaReturnType