I’m wondering if the new c++ feature std::async is quite comparable to the two C# keywords async/await or not and if not why?
I’m wondering if the new c++ feature std::async is quite comparable to the two
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I’m wondering if the new c++ feature std::async is quite comparable to the two C# keywords async/await or not and if not why?
Not really, assuming I’m reading this std::async documentation correctly.
C# 5’s async/await feature involves a complex compiler transformation of the asynchronous method so that you can write code which looks pretty much synchronous, but has points of asynchrony. The compiler builds a state machine for you, creates appropriate callbacks etc.
EDIT: While I previously believed that
std::asyncsimply forced you to pass in a callback explicitly, it looks like it’s even more primitive than that. Either way, I believe it’s mostly/completely a library feature whereas C# 5’s asynchronous methods are mostly a language feature with library support.EDIT: As noted further in comments, it looks like it’s on its way for VC++…