RFR: 8186085: (opt) add filter(), flatMap(), and map() methods to OptionalDouble/Int/Long

[Rémi Forax]

On Sun, 1 Nov 2020 13:20:20 GMT, Kartik Ohri <github.com+27751938+amCap1712 at openjdk.org> wrote:

>> Hi !
>> thanks for taking the time to craft that pull request but this is typically the kind of patch that should be discussed on the mailing list first before creating a pull request.
>> 
>> There are several issues, one is that we want to retrofit OptionalInt, OptionalLong, etc to be Optional<int>, Optional<long> as part of project Valhalla so we don't want to add more methods in the primitive variants of Optional and Stream to avoid to be blocked later while trying retrofitting those classes due to these methods.
>> So we know that some methods are missing but we want to know first how the specialization of generics over primitive types works before adding those methods.
>> 
>> The second issue is that when you want to change the public API of the JDK, you have to create a CSR to ask to the CSR guys/girls leaded by Joe Darcy if the signature and the semantics of the methods you want to add are coherent with the rest of the API.
>> 
>> I recommend you to start by fixing bugs because those can be fixed by a simple pull request.
>> 
>> regards,
>> Rémi
>
> Thank you for the suggestions. I'll try fixing some bugs first. Should I close this PR as well or leave it open ?

If it doesn't break your hart too much, yes please.

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PR: https://git.openjdk.java.net/jdk/pull/857