Thanks, this works:
{.emit:"""
#include <algorithm>
void nth_element(float* arr, int size, int n) {
std::nth_element(arr, arr + n, arr + size);
} """.}
proc nth_element*(array: ptr float32, size: int, n: int) {.importcpp:
"nth_element(@)".}
> var arr = newSeq[float32](https://forum.nim-lang.org/10)
>
> for i in 0 ..< arr.len:
> arr[i] = i.float32
>
> nth_element(addr arr[0], arr.len, 5)
However if I try to export the nth_element function and import from another
module, I have an error:
.cache/nim/test1_d/@mtest1.nim.cpp: In function ‘void NimMainModule()’:
.cache/nim/test1_d/@mtest1.nim.cpp:1249:25: error: ‘nth_element’ was not
declared in this scope
1249 | nth_element((&arr__test49_u28.p->data[((NI)0)]),
[T23](https://forum.nim-lang.org/postActivity.xml#T23), ((NI)5));
| ^~~~~~~~~~~
Error: execution of an external compiler program 'g++ -c -std=gnu++17
-funsigned-char -w -fmax-errors=3 -fpermissive -pthread
-I/home/....../.choosenim/toolchains/nim-2.0.4/lib
-I/home/....development/vex-core/tests -o
/home/...../.cache/nim/test1_d/@mtest1.nim.cpp.o
/home/...../.cache/nim/test1_d/@mtest1.nim.cpp' failed with exit code: 1
it seems it cannot find the cpp declaration from the importing module.. how can
I make that declaration available? Or should I compile this module first and
import it compiled?
