1// RUN: %check_clang_tidy %s readability-redundant-function-ptr-dereference %t
2
3void f(int i);
4
5void positive() {
6 void (*p)(int) = f;
7
8 (**p)(1);
9 // CHECK-MESSAGES: :[[@LINE-1]]:4: warning: redundant repeated dereference of function pointer [readability-redundant-function-ptr-dereference]
10 // CHECK-FIXES: (*p)(1);
11 (*****p)(2);
12 // CHECK-MESSAGES: :[[@LINE-1]]:4: warning: redundant repeated
13 // CHECK-MESSAGES: :[[@LINE-2]]:5: warning: redundant repeated
14 // CHECK-MESSAGES: :[[@LINE-3]]:6: warning: redundant repeated
15 // CHECK-MESSAGES: :[[@LINE-4]]:7: warning: redundant repeated
16 // CHECK-FIXES: (*p)(2);
17}
18
19template<typename T>
20void invoke(const T& fn) {
21 fn(0); // 1
22 (*fn)(0); // 2
23 // CHECK-MESSAGES: :[[@LINE-1]]:4: warning: redundant repeated
24 // CHECK-FIXES: fn(0); // 1
25 // CHECK-FIXES: (fn)(0); // 2
26 // FIXME: Remove unnecessary parentheses.
27}
28
29void f1(int);
30void f2(double);
31void f3(char);
32
33void instantiate() {
34 invoke(fn&: f1);
35 invoke(fn&: f2);
36 invoke(fn&: f3);
37 invoke(fn: [](unsigned) {});
38}
39
40void negative() {
41 void (*q)(int) = &f;
42
43 q(1);
44 (*q)(2);
45}
46

source code of clang-tools-extra/test/clang-tidy/checkers/readability/redundant-function-ptr-dereference.cpp