On Saturday, 7 November 2015 at 11:48:56 UTC, Alex wrote:
So my general question is: why immutable variables shouldn't be
able to be moved (inside an array)?
To be pedantic, sort isn't actually moving anything. It's
reassigning elements, i.e. a[1] = a[2]. The immutable member
makes it illegal to assign one instance of ku to another:
void main() {
ku k = ku(1);
k = ku(2);
}
That's why it's failing. It's actually possible to use move one
instance into another, though:
void main() {
import std.algorithm : move;
ku k1 = ku(1);
ku k2 = ku(2);
k2.move(k1);
assert(k1.id == 2);
}
But sort doesn't work that way. You'll need to take a different
approach to sort an array of ku.
