On Sunday, 16 October 2016 08:40:32 UTC-4, Sokolov Yura wrote:
> "future" is commonly used synchronization abstraction.
> It could be implemented in a library, using mutex, channel and interface.
> Example: 
> https://github.com/Workiva/go-datastructures/blob/master/futures/selectable.go
> <https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FWorkiva%2Fgo-datastructures%2Fblob%2Fmaster%2Ffutures%2Fselectable.go&sa=D&sntz=1&usg=AFQjCNErWyxHIbetA_9_Su3al1T2kxM9tQ>

If it can be implemented as a library, why build it in to the language? 
 You don't need futures very often---far less than, say, Mutex, and mutexes 
aren't built into the language either.

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