Bjarne Stroustrup reflects on forty years of C++ and explains how modern features like classes, templates, and lambdas fit together.
CppCon.org
Discussion & Comments: reddit.com/r/cpp/
Presentation Slides, PDFs, Source Code and other presenter materials are available at: github.com/CppCon/CppCon2019
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C++20: C++ at 40
It is now 40 years since C++ (then called C with Classes) had its first non-research user. It is now 35 years since the first commercial release of C++. It is now 30 years since the start of the standards process.
So what is C++? I will try to explain what's great about C++, C++20, as a modern language, not treating it as a layer cake of features. Imagine you have never heard of C, C with Classes, or C++11. How do classes, templates, and lambdas fit together? What have constructors and destructors to do with exceptions? What's in the standard library? How can we start using C++?
Finally, I will make a few comments about how to get from older styles of C++ use to modern C++ and point to areas where we need to improve C++ further.
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Bjarne Stroustrup
C++: history, design, use, standardization, future; performance, reliability; software developer education;distributed systemsBio: www.stroustrup.com/bio.html
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Videos Filmed & Edited by Bash Films: BashFilms.com
Work at Hudson River Trading (HRT): tinyurl.com/safxfctf
Why it's here
1 person recommends this
What people say. Recommended as an insightful keynote where the creator of C++ addresses the language's evolution and flaws honestly.
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u/shponglesporein r/programming • Recommends
On “Bjarne Stroustrup (Creator of C++) Answers Top 5 Stack Overflow C++ Questions”
On a related note, his keynote from CppCon 2019 is worth watching. I was surprised by how much I agreed with him, considering how much I hate working with C++. A lot of C++ devs I work with seem to have Stockholm syndrome, to the point that they see all the obvious flaws of C++ as advantages, and I was expecting Stroustrup to be equally dogmatic, but he seems to see the flaws as well as anyone.
On “std::visit is Everything Wrong with Modern C++”
> (this is not automatic for template classes for reasons that I don't remember)
It's not automatic for cases where there are name collisions due to multiple inheritance.
https://godbolt.org/z/Ehcajd.
In your example, since all classes have a function named operator() with different argument types, the compiler will not automatically let you reference them unless they are fully qualified. `using` "overrides" this. The operator() functions should not be ambiguous because they should have different argument signatures.
EDIT: Was looking at some old C++ talks and happened upon where they got this code: link to this video
