Offending line in map:
alias typeof(_fun(.ElementType!R.init)) ElementType;
So it tires to pass .init which will be nan for floats.
A quick workaround would be:
static if (isFloatingPoint!(ElementType!R))
{
.ElementType!R x;
alias typeof(_fun(x)) ElementType;
}
else
{
alias typeof(_fun(.ElementType!R.init)) ElementType;
}
Also, my example was just a little flawed (semantically speaking),
since I was missing a return statement:
double[10] arr;
arr[] = 1.0;
auto result = map!((ref double sample){ return 1.0; })(arr[]);
This will then work with that change.
