1// RUN: %check_clang_tidy --match-partial-fixes %s modernize-redundant-void-arg %t
2
3#define NULL 0
4
5int foo();
6
7void bar();
8
9void bar2();
10
11extern "C" void ecfoo(void);
12
13extern "C" void ecfoo(void) {
14}
15
16extern int i;
17
18int j = 1;
19
20int foo(void) {
21// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: redundant void argument list in function definition [modernize-redundant-void-arg]
22// CHECK-FIXES: {{^}}int foo() {{{$}}
23 return 0;
24}
25
26typedef unsigned int my_uint;
27
28typedef void my_void;
29
30// A function taking void and returning a pointer to function taking void
31// and returning int.
32int (*returns_fn_void_int(void))(void);
33// CHECK-MESSAGES: :[[@LINE-1]]:27: warning: {{.*}} in function declaration
34// CHECK-MESSAGES: :[[@LINE-2]]:34: warning: {{.*}} in function declaration
35// CHECK-FIXES: {{^}}int (*returns_fn_void_int())();{{$}}
36
37typedef int (*returns_fn_void_int_t(void))(void);
38// CHECK-MESSAGES: :[[@LINE-1]]:37: warning: {{.*}} in typedef
39// CHECK-MESSAGES: :[[@LINE-2]]:44: warning: {{.*}} in typedef
40// CHECK-FIXES: {{^}}typedef int (*returns_fn_void_int_t())();{{$}}
41
42// Should work for type aliases as well as typedef.
43using returns_fn_void_int_t2 = int (*(void))(void);
44// CHECK-MESSAGES: :[[@LINE-1]]:39: warning: {{.*}} in type alias
45// CHECK-MESSAGES: :[[@LINE-2]]:46: warning: {{.*}} in type alias
46// CHECK-FIXES: {{^}}using returns_fn_void_int_t2 = int (*())();{{$}}
47
48int (*returns_fn_void_int(void))(void) {
49// CHECK-MESSAGES: :[[@LINE-1]]:27: warning: {{.*}} in function definition
50// CHECK-MESSAGES: :[[@LINE-2]]:34: warning: {{.*}} in function definition
51// CHECK-FIXES: {{^}}int (*returns_fn_void_int())() {{{$}}
52 return nullptr;
53}
54
55// A function taking void and returning a pointer to a function taking void
56// and returning a pointer to a function taking void and returning void.
57void (*(*returns_fn_returns_fn_void_void(void))(void))(void);
58// CHECK-MESSAGES: :[[@LINE-1]]:42: warning: {{.*}} in function declaration
59// CHECK-MESSAGES: :[[@LINE-2]]:49: warning: {{.*}} in function declaration
60// CHECK-MESSAGES: :[[@LINE-3]]:56: warning: {{.*}} in function declaration
61// CHECK-FIXES: {{^}}void (*(*returns_fn_returns_fn_void_void())())();{{$}}
62
63typedef void (*(*returns_fn_returns_fn_void_void_t(void))(void))(void);
64// CHECK-MESSAGES: :[[@LINE-1]]:52: warning: {{.*}} in typedef
65// CHECK-MESSAGES: :[[@LINE-2]]:59: warning: {{.*}} in typedef
66// CHECK-MESSAGES: :[[@LINE-3]]:66: warning: {{.*}} in typedef
67// CHECK-FIXES: {{^}}typedef void (*(*returns_fn_returns_fn_void_void_t())())();{{$}}
68
69void (*(*returns_fn_returns_fn_void_void(void))(void))(void) {
70// CHECK-MESSAGES: :[[@LINE-1]]:42: warning: {{.*}} in function definition
71// CHECK-MESSAGES: :[[@LINE-2]]:49: warning: {{.*}} in function definition
72// CHECK-MESSAGES: :[[@LINE-3]]:56: warning: {{.*}} in function definition
73// CHECK-FIXES: {{^}}void (*(*returns_fn_returns_fn_void_void())())() {{{$}}
74 return nullptr;
75}
76
77void bar(void) {
78// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: {{.*}} in function definition
79// CHECK-FIXES: {{^}}void bar() {{{$}}
80}
81
82void op_fn(int i) {
83}
84
85class gronk {
86public:
87 gronk();
88 ~gronk();
89
90 void foo();
91 void bar();
92 void bar2
93 ();
94 void operation(int i) { }
95
96private:
97 int m_i;
98 int *m_pi;
99 float m_f;
100 float *m_pf;
101 double m_d;
102 double *m_pd;
103
104 void (*f1)(void);
105 // CHECK-MESSAGES: :[[@LINE-1]]:16: warning: {{.*}} in field declaration
106 // CHECK-FIXES: {{^ }}void (*f1)();{{$}}
107
108 void (*op)(int i);
109
110 void (gronk::*p1)(void);
111 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: {{.*}} in field declaration
112 // CHECK-FIXES: {{^ }}void (gronk::*p1)();{{$}}
113
114 int (gronk::*p_mi);
115
116 void (gronk::*p2)(int);
117
118 void (*(*returns_fn_returns_fn_void_void(void))(void))(void);
119 // CHECK-MESSAGES: :[[@LINE-1]]:44: warning: {{.*}} in function declaration
120 // CHECK-MESSAGES: :[[@LINE-2]]:51: warning: {{.*}} in function declaration
121 // CHECK-MESSAGES: :[[@LINE-3]]:58: warning: {{.*}} in function declaration
122 // CHECK-FIXES: {{^}} void (*(*returns_fn_returns_fn_void_void())())();{{$}}
123
124 void (*(*(gronk::*returns_fn_returns_fn_void_void_mem)(void))(void))(void);
125 // CHECK-MESSAGES: :[[@LINE-1]]:58: warning: {{.*}} in field declaration
126 // CHECK-MESSAGES: :[[@LINE-2]]:65: warning: {{.*}} in field declaration
127 // CHECK-MESSAGES: :[[@LINE-3]]:72: warning: {{.*}} in field declaration
128 // CHECK-FIXES: {{^}} void (*(*(gronk::*returns_fn_returns_fn_void_void_mem)())())();{{$}}
129};
130
131int i;
132int *pi;
133void *pv = (void *) pi;
134float f;
135float *fi;
136double d;
137double *pd;
138
139void (*f1)(void);
140// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: {{.*}} in variable declaration
141// CHECK-FIXES: {{^}}void (*f1)();{{$}}
142
143void (*f2)(void) = nullptr;
144// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: {{.*}} in variable declaration with initializer
145// CHECK-FIXES: {{^}}void (*f2)() = nullptr;{{$}}
146
147void (*f2b)(void)(nullptr);
148// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: {{.*}} in variable declaration with initializer
149// CHECK-FIXES: {{^}}void (*f2b)()(nullptr);{{$}}
150
151void (*f2c)(void){nullptr};
152// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: {{.*}} in variable declaration with initializer
153// CHECK-FIXES: {{^}}void (*f2c)(){nullptr};{{$}}
154
155void (*f2d)(void) = NULL;
156// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: {{.*}} in variable declaration with initializer
157// CHECK-FIXES: {{^}}void (*f2d)() = NULL;{{$}}
158
159void (*f2e)(void)(NULL);
160// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: {{.*}} in variable declaration with initializer
161// CHECK-FIXES: {{^}}void (*f2e)()(NULL);{{$}}
162
163void (*f2f)(void){NULL};
164// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: {{.*}} in variable declaration with initializer
165// CHECK-FIXES: {{^}}void (*f2f)(){NULL};{{$}}
166
167void (*f3)(void) = bar;
168// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: {{.*}} in variable declaration with initializer
169// CHECK-FIXES: {{^}}void (*f3)() = bar;{{$}}
170
171void (*o1)(int i);
172void (*o2)(int i) = nullptr;
173void (*o3)(int i)(nullptr);
174void (*o4)(int i){nullptr};
175void (*o5)(int i) = NULL;
176void (*o6)(int i)(NULL);
177void (*o7)(int i){NULL};
178void (*o8)(int i) = op_fn;
179
180void (*fa)();
181
182void (*fb)() = nullptr;
183
184void (*fc)() = bar;
185
186typedef void (function_ptr)(void);
187// CHECK-MESSAGES: :[[@LINE-1]]:29: warning: {{.*}} in typedef
188// CHECK-FIXES: {{^}}typedef void (function_ptr)();{{$}}
189
190// intentionally not LLVM style to check preservation of whitespace
191typedef void (function_ptr2)
192 (
193 void
194 );
195// CHECK-MESSAGES: :[[@LINE-2]]:9: warning: {{.*}} in typedef
196// CHECK-FIXES: {{^typedef void \(function_ptr2\)$}}
197// CHECK-FIXES-NEXT: {{^ \($}}
198// CHECK-FIXES-NEXT: {{^ $}}
199// CHECK-FIXES-NEXT: {{^ \);$}}
200
201// intentionally not LLVM style to check preservation of whitespace
202// clang-format off
203typedef
204void
205(
206*
207(
208*
209returns_fn_returns_fn_void_void_t2
210(
211void
212)
213)
214(
215void
216)
217)
218(
219void
220)
221;
222// CHECK-MESSAGES: :[[@LINE-11]]:1: warning: {{.*}} in typedef
223// CHECK-MESSAGES: :[[@LINE-8]]:1: warning: {{.*}} in typedef
224// CHECK-MESSAGES: :[[@LINE-5]]:1: warning: {{.*}} in typedef
225// CHECK-FIXES: {{^typedef$}}
226// CHECK-FIXES-NEXT: {{^void$}}
227// CHECK-FIXES-NEXT: {{^\($}}
228// CHECK-FIXES-NEXT: {{^\*$}}
229// CHECK-FIXES-NEXT: {{^\($}}
230// CHECK-FIXES-NEXT: {{^\*$}}
231// CHECK-FIXES-NEXT: {{^returns_fn_returns_fn_void_void_t2$}}
232// CHECK-FIXES-NEXT: {{^\($}}
233// CHECK-FIXES-NOT: {{[^ ]}}
234// CHECK-FIXES: {{^\)$}}
235// CHECK-FIXES-NEXT: {{^\)$}}
236// CHECK-FIXES-NEXT: {{^\($}}
237// CHECK-FIXES-NOT: {{[^ ]}}
238// CHECK-FIXES: {{^\)$}}
239// CHECK-FIXES-NEXT: {{^\)$}}
240// CHECK-FIXES-NEXT: {{^\($}}
241// CHECK-FIXES-NOT: {{[^ ]}}
242// CHECK-FIXES: {{^\)$}}
243// CHECK-FIXES-NEXT: {{^;$}}
244// clang-format on
245
246void (gronk::*p1)(void);
247// CHECK-MESSAGES: :[[@LINE-1]]:19: warning: {{.*}} in variable declaration
248// CHECK-FIXES: {{^}}void (gronk::*p1)();{{$}}
249
250void (gronk::*p2)(void) = &gronk::foo;
251// CHECK-MESSAGES: :[[@LINE-1]]:19: warning: {{.*}} in variable declaration with initializer
252// CHECK-FIXES: {{^}}void (gronk::*p2)() = &gronk::foo;{{$}}
253
254typedef void (gronk::*member_function_ptr)(void);
255// CHECK-MESSAGES: :[[@LINE-1]]:44: warning: {{.*}} in typedef
256// CHECK-FIXES: {{^}}typedef void (gronk::*member_function_ptr)();{{$}}
257
258// intentionally not LLVM style to check preservation of whitespace
259typedef void (gronk::*member_function_ptr2)
260 (
261 void
262 );
263// CHECK-MESSAGES: :[[@LINE-2]]:9: warning: {{.*}} in typedef
264// CHECK-FIXES: {{^typedef void \(gronk::\*member_function_ptr2\)$}}
265// CHECK-FIXES-NEXT: {{^ \($}}
266// CHECK-FIXES-NEXT: {{^ $}}
267// CHECK-FIXES-NEXT: {{^ \);$}}
268
269void gronk::foo() {
270 void (*f1)(void) = &::bar;
271 // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: {{.*}} in variable declaration with initializer
272 // CHECK-FIXES: {{^ }}void (*f1)() = &::bar;{{$}}
273
274 void (*f2)(void);
275 // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: {{.*}} in variable declaration
276 // CHECK-FIXES: {{^ }}void (*f2)();{{$}}
277
278 // intentionally not LLVM style to check preservation of whitespace
279 void (*f3)
280 (
281 void
282 );
283 // CHECK-MESSAGES: :[[@LINE-2]]:11: warning: {{.*}} in variable declaration
284 // CHECK-FIXES: {{^ }}void (*f3){{$}}
285 // CHECK-FIXES-NEXT: {{^ \($}}
286 // CHECK-FIXES-NEXT: {{^ $}}
287 // CHECK-FIXES-NEXT: {{^ \);$}}
288}
289
290void gronk::bar(void) {
291// CHECK-MESSAGES: :[[@LINE-1]]:17: warning: {{.*}} in function definition
292// CHECK-FIXES: {{^}}void gronk::bar() {{{$}}
293 void (gronk::*p3)(void) = &gronk::foo;
294 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: {{.*}} in variable declaration with initializer
295 // CHECK-FIXES: {{^ }}void (gronk::*p3)() = &gronk::foo;{{$}}
296
297 void (gronk::*p4)(void);
298 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: {{.*}} in variable declaration
299 // CHECK-FIXES: {{^ }}void (gronk::*p4)();{{$}}
300
301 // intentionally not LLVM style to check preservation of whitespace
302 void (gronk::*p5)
303 (
304 void
305 );
306 // CHECK-MESSAGES: :[[@LINE-2]]:11: warning: {{.*}} in variable declaration
307 // CHECK-FIXES: {{^ }}void (gronk::*p5){{$}}
308 // CHECK-FIXES-NEXT: {{^ \($}}
309 // CHECK-FIXES-NExT: {{^ $}}
310 // CHECK-FIXES-NExT: {{^ \);$}}
311}
312
313// intentionally not LLVM style to check preservation of whitespace
314void gronk::bar2
315 (
316 void
317 )
318// CHECK-MESSAGES: :[[@LINE-2]]:3: warning: {{.*}} in function definition
319// CHECK-FIXES: {{^void gronk::bar2$}}
320// CHECK-FIXES-NEXT: {{^ \($}}
321// CHECK-FIXES-NEXT: {{^ $}}
322// CHECK-FIXES-NEXT: {{^ \)$}}
323{
324}
325
326gronk::gronk(void)
327// CHECK-MESSAGES: :[[@LINE-1]]:14: warning: {{.*}} in function definition
328// CHECK-FIXES: {{^}}gronk::gronk(){{$}}
329 : f1(nullptr),
330 p1(nullptr) {
331}
332
333gronk::~gronk(void) {
334// CHECK-MESSAGES: :[[@LINE-1]]:15: warning: {{.*}} in function definition
335// CHECK-FIXES: {{^}}gronk::~gronk() {{{$}}
336}
337
338class nutter {
339public:
340 nutter();
341};
342
343nutter::nutter(void) {
344// CHECK-MESSAGES: :[[@LINE-1]]:16: warning: {{.*}} in function definition
345// CHECK-FIXES: {{^}}nutter::nutter() {{{$}}
346 void (*f3)(void) = static_cast<void (*)(void)>(0);
347 // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: {{.*}} in variable declaration with initializer
348 // CHECK-MESSAGES: :[[@LINE-2]]:43: warning: {{.*}} in named cast
349 // CHECK-FIXES: void (*f3)() = static_cast<void (*)()>(0);{{$}}
350
351 void (*f4)(void) = (void (*)(void)) 0;
352 // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: {{.*}} in variable declaration with initializer
353 // CHECK-MESSAGES: :[[@LINE-2]]:32: warning: {{.*}} in cast expression
354 // CHECK-FIXES: void (*f4)() = (void (*)()) 0;{{$}}
355
356 void (*f5)(void) = reinterpret_cast<void (*)(void)>(0);
357 // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: {{.*}} in variable declaration with initializer
358 // CHECK-MESSAGES: :[[@LINE-2]]:48: warning: {{.*}} in named cast
359 // CHECK-FIXES: void (*f5)() = reinterpret_cast<void (*)()>(0);{{$}}
360
361 // intentionally not LLVM style to check preservation of whitespace
362 void (*f6)(void) = static_cast<void (*)
363 (
364 void
365 )>(0);
366 // CHECK-MESSAGES: :[[@LINE-4]]:14: warning: {{.*}} in variable declaration with initializer
367 // CHECK-MESSAGES: :[[@LINE-3]]:11: warning: {{.*}} in named cast
368 // CHECK-FIXES: {{^ }}void (*f6)() = static_cast<void (*){{$}}
369 // CHECK-FIXES-NEXT: {{^ \($}}
370 // CHECK-FIXES-NEXT: {{^ $}}
371 // CHECK-FIXES-NEXT: {{^ }})>(0);{{$}}
372
373 // intentionally not LLVM style to check preservation of whitespace
374 void (*f7)(void) = (void (*)
375 (
376 void
377 )) 0;
378 // CHECK-MESSAGES: :[[@LINE-4]]:14: warning: {{.*}} in variable declaration with initializer
379 // CHECK-MESSAGES: :[[@LINE-3]]:11: warning: {{.*}} in cast expression
380 // CHECK-FIXES: {{^ }}void (*f7)() = (void (*){{$}}
381 // CHECK-FIXES-NEXT: {{^ \($}}
382 // CHECK-FIXES-NEXT: {{^ $}}
383 // CHECK-FIXES-NEXT: {{^ \)\) 0;$}}
384
385 // intentionally not LLVM style to check preservation of whitespace
386 void (*f8)(void) = reinterpret_cast<void (*)
387 (
388 void
389 )>(0);
390 // CHECK-MESSAGES: :[[@LINE-4]]:14: warning: {{.*}} in variable declaration with initializer
391 // CHECK-MESSAGES: :[[@LINE-3]]:11: warning: {{.*}} in named cast
392 // CHECK-FIXES: {{^ }}void (*f8)() = reinterpret_cast<void (*){{$}}
393 // CHECK-FIXES-NEXT: {{^ \($}}
394 // CHECK-FIXES-NEXT: {{^ $}}
395 // CHECK-FIXES-NEXT: {{^ \)>\(0\);$}}
396
397 void (*o1)(int) = static_cast<void (*)(int)>(0);
398 void (*o2)(int) = (void (*)(int)) 0;
399 void (*o3)(int) = reinterpret_cast<void (*)(int)>(0);
400}
401
402class generator {
403public:
404 int operator()(void) { return 1; }
405 // CHECK-MESSAGES: :[[@LINE-1]]:18: warning: {{.*}} in function definition
406 // CHECK-FIXES: {{^ }}int operator()() { return 1; }{{$}}
407};
408
409void test_lambda_functions() {
410 auto lamb_duh = [](void (*fn)(void)) { (*fn)(); };
411 // CHECK-MESSAGES: :[[@LINE-1]]:33: warning: {{.*}} in variable declaration
412 // CHECK-FIXES: {{^ }}auto lamb_duh = [](void (*fn)()) { (*fn)(); };{{$}}
413
414 auto lambda_generator = [](void) { return 1; };
415 // CHECK-MESSAGES: :[[@LINE-1]]:30: warning: {{.*}} in lambda expression
416 // CHECK-FIXES: {{^ }}auto lambda_generator = []() { return 1; };{{$}}
417
418 auto gen2 = []() { return 1; };
419
420 auto gen3 = []{ return 1; };
421
422 auto void_returner = [](void) -> void (*)(void) { return f1; };
423 // CHECK-MESSAGES: [[@LINE-1]]:27: warning: {{.*}} in lambda expression
424 // CHECK-MESSAGES: [[@LINE-2]]:45: warning: {{.*}} in lambda expression
425 // CHECK-FIXES: {{^ }}auto void_returner = []() -> void (*)() { return f1; };{{$}}
426}
427
428#define M(x) x
429
430M(void inmacro(void) {})
431// CHECK-MESSAGES: :[[@LINE-1]]:16: warning: {{.*}} in function definition
432// CHECK-FIXES: M(void inmacro() {})
433
434#define F(A, B) \
435 struct F_##A##_##B { \
436 F_##A##_##B(void); \
437 }; \
438 F_##A##_##B::F_##A##_##B(void)
439
440F(Foo, Bar) {
441
442}
443
444struct DefinitionWithNoBody {
445 DefinitionWithNoBody(void) = delete;
446 // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: {{.*}} in function definition
447 // CHECK-FIXES: DefinitionWithNoBody() = delete;
448};
449
450
451
452#define BODY {}
453#define LAMBDA1 [](void){}
454// CHECK-MESSAGES: :[[@LINE-1]]:20: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
455// CHECK-FIXES: LAMBDA1 [](){}
456
457#define LAMBDA2 [](void)BODY
458// CHECK-MESSAGES: :[[@LINE-1]]:20: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
459// CHECK-FIXES: LAMBDA2 []()BODY
460
461#define LAMBDA3(captures, args, body) captures args body
462#define WRAP(...) __VA_ARGS__
463
464#define LAMBDA4 (void)LAMBDA3([],(void),BODY)
465// CHECK-MESSAGES: :[[@LINE-1]]:35: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
466// CHECK-FIXES: LAMBDA4 (void)LAMBDA3([],(),BODY)
467
468#define LAMBDA5 []() -> void (*)(void) {return BODY;}
469// CHECK-MESSAGES: :[[@LINE-1]]:34: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
470// CHECK-FIXES: LAMBDA5 []() -> void (*)() {return BODY;}
471void lambda_expression_with_macro_test(){
472 (void)LAMBDA1;
473 (void)LAMBDA2;
474 (void)LAMBDA3([], (void), BODY);
475 // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
476 // CHECK-FIXES: (void)LAMBDA3([], (), BODY);
477
478 LAMBDA4;
479 LAMBDA5;
480 WRAP((void)WRAP(WRAP(LAMBDA3(WRAP([]), WRAP((void)), WRAP(BODY)))));
481 // CHECK-MESSAGES: :[[@LINE-1]]:48: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
482 // CHECK-FIXES: WRAP((void)WRAP(WRAP(LAMBDA3(WRAP([]), WRAP(()), WRAP(BODY)))));
483
484 (void)WRAP([](void) {});
485 // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
486 // CHECK-FIXES: (void)WRAP([]() {});
487
488 [](void) BODY;
489 // CHECK-MESSAGES: :[[@LINE-1]]:6: warning: redundant void argument list in lambda expression [modernize-redundant-void-arg]
490 // CHECK-FIXES: []() BODY;
491}
492
493namespace qqq {
494void foo() BODY
495void bar(void) BODY;
496// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: redundant void argument list in function definition
497// CHECK-FIXES: void bar() BODY;
498}
499
500struct S_1 {
501 void g_1(void) const {
502 // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: redundant void argument list in function definition [modernize-redundant-void-arg]
503 // CHECK-FIXES: void g_1() const {
504 int a;
505 (void)a;
506 }
507
508 void g_2() const {
509 int a;
510 (void)a;
511 }
512};
513
514template <typename T0>
515struct S_2 {
516 void g_1(void) const {
517 // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: redundant void argument list in function definition [modernize-redundant-void-arg]
518 // CHECK-FIXES: void g_1() const {
519 int a;
520 (void)a;
521 }
522
523 void g_2() const {
524 int a;
525 (void)a;
526 }
527};
528
529template <typename T0>
530struct S_3 {
531 template <typename T1>
532 void g_1(void) const {
533 // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: redundant void argument list in function definition [modernize-redundant-void-arg]
534 // CHECK-FIXES: void g_1() const {
535 int a;
536 (void)a;
537 }
538 template <typename T2>
539 void g_2() const {
540 int a;
541 (void)a;
542 }
543};
544
545template <typename T1>
546void g_3(void) {
547 // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: redundant void argument list in function definition [modernize-redundant-void-arg]
548 // CHECK-FIXES: void g_3() {
549 int a;
550 (void)a;
551}
552
553//Template instantiation
554void f_testTemplate() {
555 S_1();
556 S_2<int>();
557 S_3<int>();
558 g_3<int>();
559}
560
561#define return_t(T) T
562extern return_t(void) func(void);
563// CHECK-MESSAGES: :[[@LINE-1]]:28: warning: redundant void argument list in function declaration
564// CHECK-FIXES: extern return_t(void) func();
565
566return_t(void) func(void) {
567 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: redundant void argument list in function definition
568 // CHECK-FIXES: return_t(void) func() {
569 int a;
570 (void)a;
571}
572
573extern return_t(void) func(return_t(void) (*fp)(void));
574// CHECK-MESSAGES: :[[@LINE-1]]:49: warning: redundant void argument list in variable declaration
575// CHECK-FIXES: extern return_t(void) func(return_t(void) (*fp)());
576
577return_t(void) func(return_t(void) (*fp)(void)) {
578 // CHECK-MESSAGES: :[[@LINE-1]]:42: warning: redundant void argument list in variable declaration
579 // CHECK-FIXES: return_t(void) func(return_t(void) (*fp)()) {
580 int a;
581 (void)a;
582}
583
584extern return_t(return_t(void)) func2(return_t(return_t(void)) (*fp)(void));
585// CHECK-MESSAGES: :[[@LINE-1]]:70: warning: redundant void argument list in variable declaration
586// CHECK-FIXES: extern return_t(return_t(void)) func2(return_t(return_t(void)) (*fp)());
587
588return_t(return_t(void)) func2(return_t(return_t(void)) (*fp)(void)) {
589 // CHECK-MESSAGES: :[[@LINE-1]]:63: warning: redundant void argument list in variable declaration
590 // CHECK-FIXES: return_t(return_t(void)) func2(return_t(return_t(void)) (*fp)()) {
591 int a;
592 (void)a;
593}
594#undef return_t
595

source code of clang-tools-extra/test/clang-tidy/checkers/modernize/redundant-void-arg.cpp