In C++23, you can zip the two arrays, so there's no need to declare an otherwise useless index variable:
int stdSumOfValidDataPoints(const MyData& data)
{
using namespace std;
auto&& r = ranges::views::zip_transform(
[](int data, bool valid){return data * valid;},
data.dataPoint,
data.dataPointIsValid
);
return accumulate(begin(r), end(r), 0);
}
Unfortunately, the current implementation of zip_transform in GCC doesn't understand that the output length is constant 8, so it does needless cmps every iteration to check if it should stop iterating. (Godbolt)
1 reply
In C++23, you can zip the two arrays, so there's no need to declare an otherwise useless index variable:
Unfortunately, the current implementation of zip_transform in GCC doesn't understand that the output length is constant 8, so it does needless cmps every iteration to check if it should stop iterating. (Godbolt)