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
|
// RUN: %check_clang_tidy %s performance-inefficient-algorithm %t
namespace std {
template <typename T> struct less {
bool operator()(const T &lhs, const T &rhs) { return lhs < rhs; }
};
template <typename T> struct greater {
bool operator()(const T &lhs, const T &rhs) { return lhs > rhs; }
};
struct iterator_type {};
template <typename K, typename Cmp = less<K>> struct set {
typedef iterator_type iterator;
iterator find(const K &k);
unsigned count(const K &k);
iterator begin();
iterator end();
iterator begin() const;
iterator end() const;
};
struct other_iterator_type {};
template <typename K, typename V, typename Cmp = less<K>> struct map {
typedef other_iterator_type iterator;
iterator find(const K &k);
unsigned count(const K &k);
iterator begin();
iterator end();
iterator begin() const;
iterator end() const;
};
template <typename K, typename V> struct multimap : map<K, V> {};
template <typename K> struct unordered_set : set<K> {};
template <typename K, typename V> struct unordered_map : map<K, V> {};
template <typename K> struct unordered_multiset : set<K> {};
template <typename K, typename V> struct unordered_multimap : map<K, V> {};
template <typename K, typename Cmp = less<K>> struct multiset : set<K, Cmp> {};
template <typename FwIt, typename K>
FwIt find(FwIt, FwIt end, const K &) { return end; }
template <typename FwIt, typename K, typename Cmp>
FwIt find(FwIt, FwIt end, const K &, Cmp) { return end; }
template <typename FwIt, typename Pred>
FwIt find_if(FwIt, FwIt end, Pred) { return end; }
template <typename FwIt, typename K>
unsigned count(FwIt, FwIt, const K &) { return 0; }
template <typename FwIt, typename K>
FwIt lower_bound(FwIt, FwIt end, const K &) { return end; }
template <typename FwIt, typename K, typename Ord>
FwIt lower_bound(FwIt, FwIt end, const K &, Ord) { return end; }
}
#define FIND_IN_SET(x) find(x.begin(), x.end(), 10)
// CHECK-FIXES: #define FIND_IN_SET(x) find(x.begin(), x.end(), 10)
template <typename T> void f(const T &t) {
std::set<int> s;
find(s.begin(), s.end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}s.find(46);{{$}}
find(t.begin(), t.end(), 46);
// CHECK-FIXES: {{^ }}find(t.begin(), t.end(), 46);{{$}}
}
int main() {
std::set<int> s;
auto it = std::find(s.begin(), s.end(), 43);
// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: this STL algorithm call should be replaced with a container method [performance-inefficient-algorithm]
// CHECK-FIXES: {{^ }}auto it = s.find(43);{{$}}
auto c = count(s.begin(), s.end(), 43);
// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}auto c = s.count(43);{{$}}
#define SECOND(x, y, z) y
SECOND(q,std::count(s.begin(), s.end(), 22),w);
// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}SECOND(q,s.count(22),w);{{$}}
it = find_if(s.begin(), s.end(), [](int) { return false; });
std::multiset<int> ms;
find(ms.begin(), ms.end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}ms.find(46);{{$}}
const std::multiset<int> &msref = ms;
find(msref.begin(), msref.end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}msref.find(46);{{$}}
std::multiset<int> *msptr = &ms;
find(msptr->begin(), msptr->end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}msptr->find(46);{{$}}
it = std::find(s.begin(), s.end(), 43, std::greater<int>());
// CHECK-MESSAGES: :[[@LINE-1]]:42: warning: different comparers used in the algorithm and the container [performance-inefficient-algorithm]
FIND_IN_SET(s);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}FIND_IN_SET(s);{{$}}
f(s);
std::unordered_set<int> us;
lower_bound(us.begin(), us.end(), 10);
// CHECK-FIXES: {{^ }}lower_bound(us.begin(), us.end(), 10);{{$}}
find(us.begin(), us.end(), 10);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}us.find(10);{{$}}
std::unordered_multiset<int> ums;
find(ums.begin(), ums.end(), 10);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}ums.find(10);{{$}}
std::map<int, int> intmap;
find(intmap.begin(), intmap.end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}find(intmap.begin(), intmap.end(), 46);{{$}}
std::multimap<int, int> intmmap;
find(intmmap.begin(), intmmap.end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}find(intmmap.begin(), intmmap.end(), 46);{{$}}
std::unordered_map<int, int> umap;
find(umap.begin(), umap.end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}find(umap.begin(), umap.end(), 46);{{$}}
std::unordered_multimap<int, int> ummap;
find(ummap.begin(), ummap.end(), 46);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}find(ummap.begin(), ummap.end(), 46);{{$}}
}
struct Value {
int value;
};
struct Ordering {
bool operator()(const Value &lhs, const Value &rhs) const {
return lhs.value < rhs.value;
}
bool operator()(int lhs, const Value &rhs) const { return lhs < rhs.value; }
};
void g(std::set<Value, Ordering> container, int value) {
lower_bound(container.begin(), container.end(), value, Ordering());
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: this STL algorithm call should be
// CHECK-FIXES: {{^ }}lower_bound(container.begin(), container.end(), value, Ordering());{{$}}
}
|
