trns1997 commented on issue #16775:
URL: https://github.com/apache/nuttx/issues/16775#issuecomment-3160301488
I just built and tested the following using `CONFIG_CXX_STANDARD="c++20"` on
a `XMC4800`:
```
#include <nuttx/config.h>
#include <cstdio>
#include <debug.h>
#include <ranges>
#include <vector>
#include <numeric>
extern "C" int main(int argc, FAR char *argv[])
{
std::vector<int> v(10);
std::iota(v.begin(), v.end(), 1); // fills with 1,2,…,10
auto is_even = [](int x) { return x % 2 == 0; };
auto square = [](int x) { return x * x; };
// Compose a view: filter evens, then square, then take first 3 results
auto result = v
| std::views::filter(is_even)
| std::views::transform(square)
| std::views::take(3);
for (int x : result) {
printf("%d\n", x);
}
return 0;
}
```
### Output in picocom
```
nsh> helloxx
4
16
36
```
So views and ranges seem to be working just fine, cannot guarantee that all
C++20 features will work but this is super nice to know for all future users :)
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