blob: 9705e94b630311eddab22337539a1f8ae900e656 (
plain)
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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
#pragma once
#include <erebos/storage.h>
#include <optional>
#include <vector>
namespace erebos
{
using std::nullopt;
using std::optional;
using std::vector;
template<class T> struct Mergeable
{
};
template<> struct Mergeable<vector<Stored<Object>>>
{
using Component = Object;
static vector<Stored<Object>> components(const vector<Stored<Object>> & x) { return x; }
static vector<Stored<Object>> merge(const vector<Stored<Object>> & x) { return x; }
};
vector<Stored<Object>> findPropertyObjects(const vector<Stored<Object>> & leaves, const string & prop);
template<typename T>
optional<Stored<typename Mergeable<T>::Component>> findPropertyComponent(const vector<Stored<typename Mergeable<T>::Component>> & components, const string & prop)
{
vector<Stored<Object>> leaves;
leaves.reserve(components.size());
for (const auto & c : components)
leaves.push_back(Stored<Object>::load(c.ref()));
auto candidates = findPropertyObjects(leaves, prop);
if (!candidates.empty())
return Stored<typename Mergeable<T>::Component>::load(candidates[0].ref());
return nullopt;
}
template<typename T>
optional<Stored<typename Mergeable<T>::Component>> findPropertyComponent(const T & x, const string & prop)
{
return findPropertyComponent(x.components(), prop);
}
template<typename T>
vector<Stored<typename Mergeable<T>::Component>> findPropertyComponents(const vector<Stored<typename Mergeable<T>::Component>> & components, const string & prop)
{
vector<Stored<Object>> leaves;
leaves.reserve(components.size());
for (const auto & c : components)
leaves.push_back(Stored<Object>::load(c.ref()));
auto candidates = findPropertyObjects(leaves, prop);
vector<Stored<typename Mergeable<T>::Component>> result;
result.reserve(candidates.size());
for (const auto & obj : candidates)
result.push_back(Stored<typename Mergeable<T>::Component>::load(obj.ref()));
return result;
}
template<typename T>
vector<Stored<typename Mergeable<T>::Component>> findPropertyComponents(const T & x, const string & prop)
{
return findPropertyComponents(x.components(), prop);
}
}
|