I am a c++ programmer and tried to study std::future and std::promise these days. When I randomly search some information about future/promise, I found some discussion about future/promise in javascript and promise in javascript has then function. In c++, even though std::future don’t have then function now, but some proposal have mentioned it. So, there are two question:
- does
std::futurein c++ corresponding to promise in javascript? - if 1 is true, why they confused future and promise?
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Answer
- Yes.
std::future<T>stands for a future result ofT, i.e. the object will at some point in the future hold aT.std::promise<T>is an object promising to provide aTat some point in the future.
Which language got the naming right is debatable.