auto | A collection of source code generators for Java | Generator Utils library

Code readability, short-circuiting and it is not guaranteed that Ord will always outperform a || operand. Computer systems are more complicated than expected, even though they are man-made.

There was a case where a for loop with a much more complicated condition ran faster on an IBM. The CPU didn't cool and thus instructions were executed faster, that was a possible reason. What I am trying to say, focus on other areas to improve code than fighting small-cases which will differ depending on the CPU and the boolean evaluation (compiler optimizations).

The evaluation order of A = B was not specified before c++17, after c++17 B is guaranteed to be evaluated before A, see https://en.cppreference.com/w/cpp/language/eval_order rule 20.

The behaviour of valMap[val] = valMap.size(); is therefore unspecified in c++14, you should use:

The thread sanitizer currently doesn't support std::atomic_thread_fence. (GCC and Clang use the same thread sanitizer, so it applies to both.)

GCC 12 (currently trunk) warns about it:

It's not a feature of lambda and more is a feature of implicit type conversion.

What happens there is stemming from the fact that a captureless lambda can be implicitly converted to a pointer to function with same signature as lambda's operator(). +[]{} is an expression where unary + is a no-op , so the only legal result of expression is a pointer to function.

In result auto funcPtr would be a pointer to a function, not an instance of an object with anonymous type returned by lambda expression. Not much of advantage in provided code, but it can be important in type-agnostic code, e.g. where some kind of decltype expression is used. E.g.

I think your pod install working fine and has done its job. You need to set up iPhone SDK on your mac then try to run cd ../ && react-native run-ios.

Follow this guide : React Native Environment set up on Mac OS with Xcode and Android Studio

You get an error for this for the very same reason:

The question is not why this fails for int[], but why it works for all the other types! Unfortunately, you have fallen prey to ADL which is actually calling std::size instead of the size function you have written. This is because all overloads of your function fail, and so it looks in the namespace of the first argument for a matching function, where it finds std::size. Rerun your program with the function renamed to something else:

A constraint on the deduced auto type doesn't mean it needs to be a specific type, it means it needs to be one of a set of types that satisfy the constraint. Note that a constraint and a type are not the same thing, and they're not interchangeable.

e.g. a concept like std::integral constrains the deduced type to be an integral type, such as int or long, but not float, or std::string.

If I really need a std::integral datatype, couldn't I just omit the auto completely?

In principle, I suppose you could, but this would at the minimum lead to parsing difficulties. e.g. in a declaration like

Delete learning_rate='auto' solved my problem.

Thanks @FlaviaGiammarino comment!!