datacat.range source code

1 /**
2 Copyright: Copyright (c) 2018, Joakim Brännström. All rights reserved.
3 License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0)
4 Author: Joakim Brännström (joakim.brannstrom@gmx.com)
5 
6 Range API for various data structures.
7 */
8 module datacat.range;
9 
10 /// Range API for an `Iterator`.
11 struct IteratorRange(T) {
12     private {
13         T* iter;
14         bool lastChange = true;
15     }
16 
17     bool front() {
18         assert(!empty, "Can't get front of an empty range");
19         return lastChange;
20     }
21 
22     void popFront() {
23         assert(!empty, "Can't pop front of an empty range");
24         lastChange = iter.changed;
25     }
26 
27     bool empty() {
28         return !lastChange;
29     }
30 }