On Tuesday, 14 April 2020 at 20:24:05 UTC, jmh530 wrote:
In the code below, I multiply some slice by 5 and then check
whether it equals another slice. This fails for mir's
approxEqual because the two are not the same types (yes, I know
that isClose in std.math works). I was trying to convert the y
variable below to have the same double* iterator as the term on
the right, but without much success. I tried std.conv.to and
the as, slice, and sliced functions in mir.
I figure I am missing something basic, but I can't quite figure
it out...
/+dub.sdl:
dependency "mir-algorithm" version="~>3.7.28"
+/
import mir.math.common: approxEqual;
import mir.ndslice.slice : sliced;
void main() {
auto x = [0.5, 0.5].sliced(2);
auto y = x * 5.0;
assert(approxEqual(y, [2.5, 2.5].sliced(2)));
}
`approxEqual` cant work with ranges. If you look at the signature
there is a use of the constructor syntax, e.g const `T maxRelDiff
= T(0x1p-20f)` so when `T` is not a basic FP type that just does
not compile (note the error message if you try with .array on
both operands)
I'd just use zip(...).each!(...), e.g
assert(zip(y, [2.5, 2.5].sliced(2)).each!(a =>
assert(approxEqual(a[0], a[1]))));
But I don't know MIR at all.
