opCmp with structs

[Alex via Digitalmars-d-learn]

Ok... found the solution. The technical at least.

import std.algorithm;
import std.range;
void main(){
	ku[] tt = [ku(2), ku(1)];
	//writeln(tt);
	auto index3 = new size_t[tt.length];
	makeIndex!("a.id < b.id")(tt, index3);
	auto ind = indexed(tt, index3);
	//writeln(ind);
}

This yield in 'ind' the array of 'tt', ordered in the expected 
way.
So, the remaining open questions are just ideologic now...

Thanks for helping and commenting!