forked from jscheiny/Streams
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathStreamConversions.h
More file actions
167 lines (136 loc) · 5.75 KB
/
Copy pathStreamConversions.h
File metadata and controls
167 lines (136 loc) · 5.75 KB
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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#ifndef SCHEINERMAN_STREAM_STREAM_CONVERSIONS_H
#define SCHEINERMAN_STREAM_STREAM_CONVERSIONS_H
namespace stream {
namespace op {
namespace detail {
template<template<typename T, typename A> class ListContainer>
class ListContainerTerminatorMaker {
public:
ListContainerTerminatorMaker(const std::string& name) : name_(name) {}
auto operator() () const {
return make_terminator(name_, [](auto&& stream) {
using T = StreamType<decltype(stream)>;
ListContainer<T, std::allocator<T>> result;
stream | copy_to(std::back_inserter(result));
return result;
});
}
template<typename Allocator = std::allocator<void>>
auto operator() (const Allocator& allocator) const {
return make_terminator(name_, [allocator](auto&& stream) {
using T = StreamType<decltype(stream)>;
ListContainer<T, Allocator> result(allocator);
stream | copy_to(std::back_inserter(result));
return result;
});
}
private:
std::string name_;
};
template<template<typename T, typename C, typename A> class OrderedContainer>
class OrderedContainerTerminatorMaker {
public:
OrderedContainerTerminatorMaker(const std::string& name) : name_(name) {}
template<typename Compare, typename Allocator>
auto operator() (const Compare& compare,
const Allocator& allocator) const {
return make_terminator(name_, [compare, allocator](auto&& stream) {
using T = StreamType<decltype(stream)>;
OrderedContainer<T, Compare, Allocator> result(compare, allocator);
stream | copy_to(std::inserter(result, result.end()));
return result;
});
}
template<typename Compare = std::less<void>>
auto operator() (const Compare& compare = Compare()) const {
return make_terminator(name_, [compare](auto&& stream) {
using T = StreamType<decltype(stream)>;
OrderedContainer<T, Compare, std::allocator<T>> result(compare);
stream | copy_to(std::inserter(result, result.end()));
return result;
});
}
private:
std::string name_;
};
struct PolymorphicHash {
template<typename T>
decltype(auto) operator() (const T& value) {
return std::hash<T>{}(value);
}
};
template<template<typename T, typename H, typename P, typename A> class UnorderedContainer>
class UnorderedContainerTerminatorMaker {
public:
UnorderedContainerTerminatorMaker(const std::string& name) : name_(name) {}
template<typename Hash, typename Predicate, typename Allocator>
auto operator() (const Hash& hash,
const Predicate& predicate,
const Allocator& allocator) const {
return make_terminator(name_, [hash, predicate, allocator](auto&& stream) {
using T = StreamType<decltype(stream)>;
UnorderedContainer<T, Hash, Predicate, Allocator> result(0, hash, predicate, allocator);
stream | copy_to(std::inserter(result, result.end()));
return result;
});
}
template<typename Hash = PolymorphicHash,
typename Predicate = std::equal_to<void>>
auto operator() (const Hash& hash = Hash(),
const Predicate& predicate = Predicate()) const {
return make_terminator(name_, [hash, predicate](auto&& stream) {
using T = StreamType<decltype(stream)>;
UnorderedContainer<T, Hash, Predicate, std::allocator<T>> result(0, hash, predicate);
stream | copy_to(std::inserter(result, result.end()));
return result;
});
}
private:
std::string name_;
};
} /* namespace detail */
static const detail::ListContainerTerminatorMaker<std::vector> to_vector{"stream::op::to_vector"};
static const detail::ListContainerTerminatorMaker<std::list> to_list{"stream::op::to_list"};
static const detail::ListContainerTerminatorMaker<std::deque> to_deque{"stream::op::to_deque"};
static const detail::OrderedContainerTerminatorMaker<std::set> to_set{"stream::op::to_set"};
static const detail::OrderedContainerTerminatorMaker<std::multiset> to_multiset{"stream::op::to_multiset"};
static const detail::UnorderedContainerTerminatorMaker<std::unordered_set> to_unordered_set{"stream::op::to_unordered_set"};
static const detail::UnorderedContainerTerminatorMaker<std::unordered_multiset> to_unordered_multiset{"stream::op::to_unordered_multiset"};
} /* namespace op */
template<typename T>
template<typename Allocator>
Stream<T>::operator std::vector<T, Allocator>() {
return (*this) | op::to_vector(Allocator());
}
template<typename T>
template<typename Allocator>
Stream<T>::operator std::list<T, Allocator>() {
return (*this) | op::to_list(Allocator());
}
template<typename T>
template<typename Allocator>
Stream<T>::operator std::deque<T, Allocator>() {
return (*this) | op::to_deque(Allocator());
}
template<typename T>
template<typename Compare, typename Allocator>
Stream<T>::operator std::set<T, Compare, Allocator>() {
return (*this) | op::to_set(Compare(), Allocator());
}
template<typename T>
template<typename Compare, typename Allocator>
Stream<T>::operator std::multiset<T, Compare, Allocator>() {
return (*this) | op::to_multiset(Compare(), Allocator());
}
template<typename T>
template<typename Hash, typename Predicate, typename Allocator>
Stream<T>::operator std::unordered_set<T, Hash, Predicate, Allocator>() {
return (*this) | op::to_unordered_set(Hash(), Predicate(), Allocator());
}
template<typename T>
template<typename Hash, typename Predicate, typename Allocator>
Stream<T>::operator std::unordered_multiset<T, Hash, Predicate, Allocator>() {
return (*this) | op::to_unordered_multiset(Hash(), Predicate(), Allocator());
}
} /* namespace stream */
#endif