maybeSort

1 import bolts.range: isSortedRange;
2 
3 struct A { // unsortable
4     int i;
5 }
6 
7 struct B { // sortable
8     int i;
9     bool opCmp(B a) {
10         return i < a.i;
11     }
12 }
13 
14 static assert( isSortedRange!([1].maybeSort));
15 static assert(!isSortedRange!([A()].maybeSort));
16 static assert( isSortedRange!([B()].maybeSort));
17 static assert( isSortedRange!([A()].maybeSort!"a.i < b.i"));