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Comment by sidpatil | Hacker News Reader

What are some examples of these C++ features you've missed in other languages?

Zig not having operator overloading makes it suck horribly for writing any kind of vector code. If everyone had to write int a = int_add(int_mul(3, 7), 2) etc there would rightly be a riot, but since they're not 3D coders they just don't give a shit. Too bad, Zig looks great.

Sorry, one more thing to add to this: Andrew Kelley is obviously a genius, and his talk introducing Zig[0] is in my top 10 of all time technical presentations, for many reasons. But I really do wish someone close to him with a passion for how coding is in many ways applied mathematics, would ask him to please have broader algebraic support for basic operations like +, -, * and maybe divide, with their basic dataflow characteristics. Optimal speed for complex numbers vs std::complex out of the box would be attractive.

I understand his point about not wanting to allow every random C++ feature, but in these cases, it isn't a C++ feature, it's language-level basic algebra.

In C++ land, ISPC[1] is often what you use when you want top speed rendering perf on SIMD CPUs, e.g. Moonray project[2]

Please, just go ahead and define a nice clean API for vectors and scalars like OpenCL provides on its beautiful reference cards: https://www.khronos.org/files/opencl-1-2-quick-reference-car...

[0] https://www.youtube.com/watch?v=Gv2I7qTux7g

[1] https://ispc.github.io/

[2] https://openmoonray.org/

Final edit sorry: in the end I love C++ and have been learning Rust mainly out of curiosity. Avoiding C++ quirks one can have few problems and a great time.

Once, I wanted to write a C# function roughly like this:

  (T1, ..., Tn) Apply<T1, ..., Tn>((Func<P, T1>, ..., Func<P, Tn>) args)

This is not possible in C# because the language doesn't have variadic generics. Instead, I used runtime reflection and wrote something like this:

  object[] Apply(Func<P, object>[] args)

Although it worked, the downside is that the types T1, ..., Tn are no longer statically known, which means that the function's contract has to be written in comments and the caller has to check them manually. In contrast, C++ has variadic templates, which would allow the compiler to check the types automatically.

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