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1 | // Finds out the index of a sublist in the original list |
2 | // Works with nested (grand-parent) sublists. |
3 | // Does not work with lists not made with subList() (returns -1) |
4 | |
5 | // If you use NoIllegalAccesses: Make sure not to use subList(...) |
6 | // instead of .subList(...) in case you ever call magicIndexOfSubList |
7 | // on the result. |
8 | |
9 | static <A> int magicIndexOfSubList(L<A> list, L<A> sublist) {
|
10 | if (sublist == list) ret 0; |
11 | |
12 | ifclass ISubList |
13 | if (sublist cast ISubList) {
|
14 | L root = sublist.rootList(); |
15 | int o2 = sublist.subListOffset(); |
16 | if (list cast ISubList) {
|
17 | if (list.rootList() != root) ret -1; |
18 | int o1 = list.subListOffset(); |
19 | ret o2-o1; |
20 | } else {
|
21 | if (list != root) ret -1; |
22 | ret o2; |
23 | } |
24 | } |
25 | endif |
26 | |
27 | ifndef NoIllegalAccesses |
28 | Int o2 = cast get(sublist, "offset"); |
29 | if (o2 == null) ret -1; |
30 | Int o1 = cast getOpt(list, "offset"); |
31 | if (true) ret o2-(o1 != null ? o1 : 0); |
32 | endifndef |
33 | |
34 | ret -1; |
35 | } |
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| Snippet ID: | #1001832 |
| Snippet name: | magicIndexOfSubList |
| Eternal ID of this version: | #1001832/13 |
| Text MD5: | 8bedfb93982be057eef9d280d6dff4e0 |
| Transpilation MD5: | 3bf34ea240ea1e4a38d7eda543ee9cc7 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2021-07-24 03:07:48 |
| Source code size: | 1015 bytes / 35 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 522 / 1493 |
| Version history: | 12 change(s) |
| Referenced in: | [show references] |