1// RUN: %check_clang_tidy %s cppcoreguidelines-init-variables -fix-errors %t -- -- -fno-delayed-template-parsing -fexceptions
2// CHECK-FIXES: {{^}}#include <math.h>
3
4// Ensure that function declarations are not changed.
5void some_func(int x, double d, bool b, const char *p);
6
7// Ensure that function arguments are not changed
8int identity_function(int x) {
9 return x;
10}
11
12int do_not_modify_me;
13
14static int should_not_be_initialized;
15extern int should_not_be_initialized2;
16
17typedef struct {
18 int unaltered1;
19 int unaltered2;
20} UnusedStruct;
21
22typedef int my_int_type;
23#define MACRO_INT int
24#define FULL_DECLARATION() int macrodecl;
25
26template <typename T>
27void template_test_function() {
28 T t;
29 int uninitialized;
30 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: variable 'uninitialized' is not initialized [cppcoreguidelines-init-variables]
31 // CHECK-FIXES: {{^}} int uninitialized = 0;{{$}}
32}
33
34void init_unit_tests() {
35 int x;
36 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: variable 'x' is not initialized [cppcoreguidelines-init-variables]
37 // CHECK-FIXES: {{^}} int x = 0;{{$}}
38 my_int_type myint;
39 // CHECK-MESSAGES: :[[@LINE-1]]:15: warning: variable 'myint' is not initialized [cppcoreguidelines-init-variables]
40 // CHECK-FIXES: {{^}} my_int_type myint = 0;{{$}}
41
42 MACRO_INT macroint;
43 // CHECK-MESSAGES: :[[@LINE-1]]:13: warning: variable 'macroint' is not initialized [cppcoreguidelines-init-variables]
44 // CHECK-FIXES: {{^}} MACRO_INT macroint = 0;{{$}}
45 FULL_DECLARATION();
46
47 int x0 = 1, x1, x2 = 2;
48 // CHECK-MESSAGES: :[[@LINE-1]]:15: warning: variable 'x1' is not initialized [cppcoreguidelines-init-variables]
49 // CHECK-FIXES: {{^}} int x0 = 1, x1 = 0, x2 = 2;{{$}}
50 int y0, y1 = 1, y2;
51 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: variable 'y0' is not initialized [cppcoreguidelines-init-variables]
52 // CHECK-MESSAGES: :[[@LINE-2]]:19: warning: variable 'y2' is not initialized [cppcoreguidelines-init-variables]
53 // CHECK-FIXES: {{^}} int y0 = 0, y1 = 1, y2 = 0;{{$}}
54 int hasval = 42;
55
56 float f;
57 // CHECK-MESSAGES: :[[@LINE-1]]:9: warning: variable 'f' is not initialized [cppcoreguidelines-init-variables]
58 // CHECK-FIXES: {{^}} float f = NAN;{{$}}
59 float fval = 85.0;
60 double d;
61 // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: variable 'd' is not initialized [cppcoreguidelines-init-variables]
62 // CHECK-FIXES: {{^}} double d = NAN;{{$}}
63 double dval = 99.0;
64
65 bool b;
66 // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: variable 'b' is not initialized [cppcoreguidelines-init-variables]
67 // CHECK-FIXES: {{^}} bool b = false;{{$}}
68 bool bval = true;
69
70 const char *ptr;
71 // CHECK-MESSAGES: :[[@LINE-1]]:15: warning: variable 'ptr' is not initialized [cppcoreguidelines-init-variables]
72 // CHECK-FIXES: {{^}} const char *ptr = nullptr;{{$}}
73 const char *ptrval = "a string";
74
75 UnusedStruct u;
76
77 static int does_not_need_an_initializer;
78 extern int does_not_need_an_initializer2;
79 int parens(42);
80 int braces{42};
81}
82
83template <typename RANGE>
84void f(RANGE r) {
85 for (char c : r) {
86 }
87}
88
89void catch_variable_decl() {
90 // Expect no warning given here.
91 try {
92 } catch (int X) {
93 }
94}
95
96enum Color { Red,
97 Green,
98 Blue };
99
100enum Car { Benz,
101 BMW = 20,
102 Audi = BMW + 2 };
103
104enum Gender : char { Male,
105 Female };
106
107enum class Direction { Up,
108 Down,
109 Left,
110 Right };
111
112enum class Fruit : int { Apple,
113 Orange };
114
115void uninitialized_enum() {
116 Color color;
117 // CHECK-MESSAGES: :[[@LINE-1]]:9: warning: variable 'color' is not initialized [cppcoreguidelines-init-variables]
118 Car car;
119 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: variable 'car' is not initialized [cppcoreguidelines-init-variables]
120 Gender gender;
121 // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: variable 'gender' is not initialized [cppcoreguidelines-init-variables]
122 Direction direction;
123 // CHECK-MESSAGES: :[[@LINE-1]]:13: warning: variable 'direction' is not initialized [cppcoreguidelines-init-variables]
124 Fruit fruit;
125 // CHECK-MESSAGES: :[[@LINE-1]]:9: warning: variable 'fruit' is not initialized [cppcoreguidelines-init-variables]
126}
127
128void test_clang_diagnostic_error() {
129 int a;
130 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: variable 'a' is not initialized [cppcoreguidelines-init-variables]
131 // CHECK-FIXES: {{^}} int a = 0;{{$}}
132
133 UnknownType b;
134 // CHECK-MESSAGES: :[[@LINE-1]]:3: error: unknown type name 'UnknownType' [clang-diagnostic-error]
135 // CHECK-FIXES-NOT: {{^}} UnknownType b = 0;{{$}}
136}
137
138namespace gh112089 {
139 void foo(void*);
140 using FPtr = void(*)(void*);
141 void test() {
142 void(*a1)(void*);
143 // CHECK-MESSAGES: :[[@LINE-1]]:15: warning: variable 'a1' is not initialized [cppcoreguidelines-init-variables]
144 // CHECK-FIXES: void(*a1)(void*) = nullptr;
145 FPtr a2;
146 // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: variable 'a2' is not initialized [cppcoreguidelines-init-variables]
147 // CHECK-FIXES: FPtr a2 = nullptr;
148 }
149} // namespace gh112089
150
151

source code of clang-tools-extra/test/clang-tidy/checkers/cppcoreguidelines/init-variables.cpp