1 // RUN: %check_clang_tidy -std=c++20 %s modernize-use-nullptr %t -- -- -DGCC
2 // RUN: %check_clang_tidy -std=c++20 %s modernize-use-nullptr %t -- -- -DCLANG
3
4 namespace std {
5 class strong_ordering;
6
7 // Mock how STD defined unspecified parameters for the operators below.
8 #ifdef CLANG
9 struct _CmpUnspecifiedParam {
10 consteval
_CmpUnspecifiedParamstd::_CmpUnspecifiedParam11 _CmpUnspecifiedParam(int _CmpUnspecifiedParam::*) noexcept {}
12 };
13
14 #define UNSPECIFIED_TYPE _CmpUnspecifiedParam
15 #endif
16
17 #ifdef GCC
18 namespace __cmp_cat {
19 struct __unspec {
__unspecstd::__cmp_cat::__unspec20 constexpr __unspec(__unspec*) noexcept { }
21 };
22 }
23
24 #define UNSPECIFIED_TYPE __cmp_cat::__unspec
25 #endif
26
27 struct strong_ordering {
28 signed char value;
29
operator ==(strong_ordering v,UNSPECIFIED_TYPE)30 friend constexpr bool operator==(strong_ordering v,
31 UNSPECIFIED_TYPE) noexcept {
32 return v.value == 0;
33 }
operator <(strong_ordering v,UNSPECIFIED_TYPE)34 friend constexpr bool operator<(strong_ordering v,
35 UNSPECIFIED_TYPE) noexcept {
36 return v.value < 0;
37 }
operator >(strong_ordering v,UNSPECIFIED_TYPE)38 friend constexpr bool operator>(strong_ordering v,
39 UNSPECIFIED_TYPE) noexcept {
40 return v.value > 0;
41 }
operator >=(strong_ordering v,UNSPECIFIED_TYPE)42 friend constexpr bool operator>=(strong_ordering v,
43 UNSPECIFIED_TYPE) noexcept {
44 return v.value >= 0;
45 }
46 static const strong_ordering equal, greater, less;
47 };
48
49 constexpr strong_ordering strong_ordering::equal = {0};
50 constexpr strong_ordering strong_ordering::greater = {1};
51 constexpr strong_ordering strong_ordering::less = {-1};
52 } // namespace std
53
54 class A {
55 int a;
56 public:
57 auto operator<=>(const A &other) const = default;
58 // CHECK-FIXES: auto operator<=>(const A &other) const = default;
59 };
60
test_cxx_rewritten_binary_ops()61 void test_cxx_rewritten_binary_ops() {
62 A a1, a2;
63 bool result;
64 // should not change next line to (a1 nullptr a2)
65 result = (a1 < a2);
66 // CHECK-FIXES: result = (a1 < a2);
67 // should not change next line to (a1 nullptr a2)
68 result = (a1 >= a2);
69 // CHECK-FIXES: result = (a1 >= a2);
70 int *ptr = 0;
71 // CHECK-FIXES: int *ptr = nullptr;
72 result = (a1 > (ptr == 0 ? a1 : a2));
73 // CHECK-FIXES: result = (a1 > (ptr == nullptr ? a1 : a2));
74 result = (a1 > ((a1 > (ptr == 0 ? a1 : a2)) ? a1 : a2));
75 // CHECK-FIXES: result = (a1 > ((a1 > (ptr == nullptr ? a1 : a2)) ? a1 : a2));
76 }
77
testValidZero()78 void testValidZero() {
79 A a1, a2;
80 auto result = a1 <=> a2;
81 if (result < 0) {}
82 // CHECK-FIXES: if (result < 0) {}
83 }
84
85 template<class T1, class T2>
86 struct P {
87 T1 x1;
88 T2 x2;
89 friend auto operator<=>(const P&, const P&) = default;
90 // CHECK-FIXES: friend auto operator<=>(const P&, const P&) = default;
91 };
92
foo(P<int,int> x,P<int,int> y)93 bool foo(P<int,int> x, P<int, int> y) { return x < y; }
94 // CHECK-FIXES: bool foo(P<int,int> x, P<int, int> y) { return x < y; }
95