Key tools for C++ container library performance are guaranteed copy elision and guaranteed return value optimization. One trick for library writers (which needn't complicate life for library users) is:pic.twitter.com/WFtJx7TGBe
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What's your take on the new ranges stuff coming in C++20?
If one accepts the iterators-over-mutable-containers design of std, ranges are the next logical step in generifying traversal algorithms. Personally though I’d argue for using coroutines to decouple production and consumption or, in Prolog terms, backtracking search.
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