On Tuesday, 7 July 2015 at 05:27:10 UTC, jmh530 wrote:
If I call a function like
int[] square_array(int[] x)
{
return x[] *= x[];
}
I get an error that there is an overlapping array in a vector
operation. I guess this makes sense as the lhs and rhs are
occupying the same memory. Nevertheless, I find it a little
frustrating.
I tried two alternatives, one just adds a temporary duplicate
array for the lhs x[] in the above, while the other uses a
foreach loop. Both get correct results without errors, but also
have their issues. Duplicating requires memory allocation,
which makes it slower for small arrays. Foreach (ignoring
parallelism or SIMD) tends to be slower for larger arrays, I
take it due to compiler optimizations for vector operations.
Are there any other alternatives here?
I have never used arrays in that way before, though I don't get
why you are writing return line in that way. Shouldn't it be like
`return (x[] * x[]);` ?
