1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
#ifndef STL_HELPER_H
#define STL_HELPER_H
// typeof() is a g++ extension
#define foreach(collection, it) \
for (typeof(collection.begin()) it = (collection).begin(); \
it != (collection).end(); \
it++)
#define enumerate(collection, it, i) \
for (typeof(collection.begin()) it = ({i = 0; (collection).begin();}); \
it != (collection).end(); \
it++, i++)
#define apply_foreach(collection, fun, ...) \
foreach(collection, __apply_it_ ## collection) { \
fun(*__apply_it_ ## collection, ## __VA_ARGS__); \
}
#define map_ref(from, to, init, fun, ...) \
{ \
(to).clear(); \
(to).reserve((from).size()); \
foreach(from, __map_ref_it) { \
(to).push_back(init()); \
fun(*__map_ref_it, (to).back(), \
## __VA_ARGS__); \
} \
}
#endif
|
