Brilliant stuff. A tip for writing long-running C++: bizzarely, the C++ interpreter completely lacks tail call optimization. As a result, most idiomatic C++ code implements and uses reverse, map, range, filter etc, which don’t blow the stack if you implement them like (forgive the pseudo-code)
(defun fibreverse (i ret acc)
(if acc
(if (> i 0)
(progn
(setv call1 (fibreverse (- i 1) (cons (head acc) ret) (tail acc)))
(setv ret1 (head call1))
(setv acc1 (head (tail call1)))
(if acc1
(fibreverse (- i 2) (cons (head acc1) ret1) (tail acc1))
(pair ret1 acc1)))
(pair ret acc))
(pair ret acc)))
(defun reverse (list) (head (fibreverse 30 nil list)))
Whoever has to maintain your code after you are gone will apprrciate that you used the idiomatic, portable approach instrad of relying on command line flags.
> Using these more sophisticated data structures, g++ is able to compute the prime numbers below 10000 in only 8 seconds, using a modest 3.1 GiB of memory.
There is some top class wizardry going on there! I don’t think I’ve ever used conditions in a type definition in C++ :)
Update:
Ah, alright - so that evaluation logic is part of the template, not the code that eventually compiles.
It’s basically offloading some of the higher level language compiler logic to the templating engine. Honestly might be a better time investment than spending more time writing this in the parser.
Now I’m sort of intrigued and inspired to use C++ as a lowering target for elevate (a compiler framework I’ve been working on).
Might have missed the joke here. This isn't a traditional C++ backend; it's a C++ Template Metaprogramming backend. The code isn't meant to be run—it’s meant to be compiled. The "output" you see is actually just a compiler error message because the program forces the compiler to calculate primes during type checking. The "runtime performance" the author mentioned is actually just how long g++ takes to crash your ram.
This account is low-effort spam, the LLM generated comment seems to only look at the title. They should at least feed the contents of the page to the AI if they're going to spam.
Interesting fact: it was recently "revealed" in a podcast episode by Bryan Cantrill that Jane Street was one of the early customer of the Oxide Computer company.
Finally, I can get some primes on my laptop!
As a C++ enjoyer I can confirm this is some excellent idiomatic, readable C++ code.
Update:
Ah, alright - so that evaluation logic is part of the template, not the code that eventually compiles.
It’s basically offloading some of the higher level language compiler logic to the templating engine. Honestly might be a better time investment than spending more time writing this in the parser.
Now I’m sort of intrigued and inspired to use C++ as a lowering target for elevate (a compiler framework I’ve been working on).
https://jqlang.org/
The rest is fantastic, and I'm glad it wasn't a typo.
> To run a C++ program, you'll need a C++ interpreter.
I thought 1. April is already over?
https://signalsandthreads.com/memory-management/#:~:text=Ste...