1// RUN: clang-tidy %s -checks=-*,google-readability-casting -- \
2// RUN: -xobjective-c++ -fobjc-abi-version=2 -fobjc-arc | count 0
3
4// Note: this test expects no diagnostics, but FileCheck cannot handle that,
5// hence the use of | count 0.
6
7bool g() { return false; }
8
9enum Enum { Enum1 };
10struct X {};
11struct Y : public X {};
12
13void f(int a, double b, const char *cpc, const void *cpv, X *pX) {
14
15 typedef const char *Typedef1;
16 typedef const char *Typedef2;
17 Typedef1 t1;
18 (Typedef2)t1;
19 (const char*)t1;
20 (Typedef1)cpc;
21
22 typedef char Char;
23 char *pc;
24 Char *pChar = (Char*)pc;
25
26 (Char)*cpc;
27
28 (char)*pChar;
29
30 (const char*)cpv;
31
32 char *pc2 = (char*)(cpc + 33);
33
34 const char &crc = *cpc;
35 char &rc = (char&)crc;
36
37 char &rc2 = (char&)*cpc;
38
39 char ** const* const* ppcpcpc;
40 char ****ppppc = (char****)ppcpcpc;
41
42 char ***pppc = (char***)*(ppcpcpc);
43
44 char ***pppc2 = (char***)(*ppcpcpc);
45
46 char *pc5 = (char*)(const char*)(cpv);
47
48 int b1 = (int)b;
49 b1 = (const int&)b;
50
51 b1 = (int) b;
52
53 b1 = (int) b;
54
55 b1 = (int) (b);
56
57 b1 = (int) (b);
58
59 Y *pB = (Y*)pX;
60 Y &rB = (Y&)*pX;
61
62 const char *pc3 = (const char*)cpv;
63
64 char *pc4 = (char*)cpv;
65
66 b1 = (int)Enum1;
67
68 Enum e = (Enum)b1;
69
70 int b2 = int(b);
71 int b3 = static_cast<double>(b);
72 int b4 = b;
73 double aa = a;
74 (void)b2;
75 return (void)g();
76}
77
78template <typename T>
79void template_function(T t, int n) {
80 int i = (int)t;
81}
82
83template <typename T>
84struct TemplateStruct {
85 void f(T t, int n) {
86 int k = (int)t;
87 }
88};
89
90void test_templates() {
91 template_function(t: 1, n: 42);
92 template_function(t: 1.0, n: 42);
93 TemplateStruct<int>().f(t: 1, n: 42);
94 TemplateStruct<double>().f(t: 1.0, n: 42);
95}
96
97extern "C" {
98void extern_c_code(const char *cpc) {
99 char *pc = (char*)cpc;
100}
101}
102
103#define CAST(type, value) (type)(value)
104void macros(double d) {
105 int i = CAST(int, d);
106}
107
108enum E { E1 = 1 };
109template <E e>
110struct A {
111 // Usage of template argument e = E1 is represented as (E)1 in the AST for
112 // some reason. We have a special treatment of this case to avoid warnings
113 // here.
114 static const E ee = e;
115};
116struct B : public A<E1> {};
117
118
119void overloaded_function();
120void overloaded_function(int);
121
122template<typename Fn>
123void g(Fn fn) {
124 fn();
125}
126
127void function_casts() {
128 typedef void (*FnPtrVoid)();
129 typedef void (&FnRefVoid)();
130 typedef void (&FnRefInt)(int);
131
132 g(fn: (void (*)())overloaded_function);
133 g(fn: (void (*)())&overloaded_function);
134 g(fn: (void (&)())overloaded_function);
135
136 g(fn: (FnPtrVoid)overloaded_function);
137 g(fn: (FnPtrVoid)&overloaded_function);
138 g(fn: (FnRefVoid)overloaded_function);
139
140 FnPtrVoid fn0 = (void (*)())&overloaded_function;
141 FnPtrVoid fn1 = (void (*)())overloaded_function;
142 FnPtrVoid fn1a = (FnPtrVoid)overloaded_function;
143 FnRefInt fn2 = (void (&)(int))overloaded_function;
144 auto fn3 = (void (*)())&overloaded_function;
145 auto fn4 = (void (*)())overloaded_function;
146 auto fn5 = (void (&)(int))overloaded_function;
147
148 void (*fn6)() = (void (*)())&overloaded_function;
149 void (*fn7)() = (void (*)())overloaded_function;
150 void (*fn8)() = (FnPtrVoid)overloaded_function;
151 void (&fn9)(int) = (void (&)(int))overloaded_function;
152
153 void (*correct1)() = static_cast<void (*)()>(overloaded_function);
154 FnPtrVoid correct2 = static_cast<void (*)()>(&overloaded_function);
155 FnRefInt correct3 = static_cast<void (&)(int)>(overloaded_function);
156}
157
158struct S {
159 S(const char *);
160};
161struct ConvertibleToS {
162 operator S() const;
163};
164struct ConvertibleToSRef {
165 operator const S&() const;
166};
167
168void conversions() {
169 //auto s1 = (const S&)"";
170 auto s2 = (S)"";
171 auto s2a = (struct S)"";
172 auto s2b = (const S)"";
173 ConvertibleToS c;
174 auto s3 = (const S&)c;
175 auto s4 = (S)c;
176 ConvertibleToSRef cr;
177 auto s5 = (const S&)cr;
178 auto s6 = (S)cr;
179}
180

source code of clang-tools-extra/test/clang-tidy/checkers/google/readability-casting.mm