1// RUN: %clang_cc1 -Wparentheses -fsyntax-only -verify %s
2// RUN: %clang_cc1 -Wparentheses -fsyntax-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
3
4bool someConditionFunc();
5
6void conditional_op(int x, int y, bool b) {
7  (void)(x + someConditionFunc() ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} \
8                                           // expected-note {{place parentheses around the '+' expression to silence this warning}} \
9                                           // expected-note {{place parentheses around the '?:' expression to evaluate it first}}
10  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
11  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:33-[[@LINE-4]]:33}:")"
12  // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"("
13  // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:41-[[@LINE-6]]:41}:")"
14
15  (void)(x - b ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '-'}} \
16                         // expected-note {{place parentheses around the '-' expression to silence this warning}} \
17                         // expected-note {{place parentheses around the '?:' expression to evaluate it first}}
18  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
19  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:15-[[@LINE-4]]:15}:")"
20  // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"("
21  // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:23-[[@LINE-6]]:23}:")"
22
23  (void)(x * (x == y) ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '*'}} \
24                                // expected-note {{place parentheses around the '*' expression to silence this warning}} \
25                                // expected-note {{place parentheses around the '?:' expression to evaluate it first}}
26  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
27  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:22-[[@LINE-4]]:22}:")"
28  // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"("
29  // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:30-[[@LINE-6]]:30}:")"
30}
31
32class Stream {
33public:
34  operator int();
35  Stream &operator<<(int);
36  Stream &operator<<(const char*);
37  Stream &operator>>(int);
38  Stream &operator>>(const char*);
39};
40
41void f(Stream& s, bool b) {
42  (void)(s << b ? "foo" : "bar"); // expected-warning {{operator '?:' has lower precedence than '<<'}} \
43                                  // expected-note {{place parentheses around the '<<' expression to silence this warning}} \
44                                  // expected-note {{place parentheses around the '?:' expression to evaluate it first}}
45  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
46  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")"
47  // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
48  // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:32-[[@LINE-6]]:32}:")"
49
50  (void)(s << 5 == 1); // expected-warning {{overloaded operator << has lower precedence than comparison operator}} \
51                       // expected-note {{place parentheses around the '<<' expression to silence this warning}} \
52                       // expected-note {{place parentheses around comparison expression to evaluate it first}}
53  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
54  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")"
55  // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
56  // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:21-[[@LINE-6]]:21}:")"
57
58  (void)(s >> 5 == 1); // expected-warning {{overloaded operator >> has lower precedence than comparison operator}} \
59                       // expected-note {{place parentheses around the '>>' expression to silence this warning}} \
60                       // expected-note {{place parentheses around comparison expression to evaluate it first}}
61  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
62  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")"
63  // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
64  // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:21-[[@LINE-6]]:21}:")"
65}
66
67struct S {
68  operator int() { return 42; }
69  friend S operator+(const S &lhs, bool) { return S(); }
70};
71
72void test(S *s, bool (S::*m_ptr)()) {
73  (void)(*s + true ? "foo" : "bar"); // expected-warning {{operator '?:' has lower precedence than '+'}} \
74                                     // expected-note {{place parentheses around the '+' expression to silence this warning}} \
75                                     // expected-note {{place parentheses around the '?:' expression to evaluate it first}}
76  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
77  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:19-[[@LINE-4]]:19}:")"
78  // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
79  // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:35-[[@LINE-6]]:35}:")"
80
81  (void)((*s + true) ? "foo" : "bar"); // No warning.
82
83  // Don't crash on unusual member call expressions.
84  (void)((s->*m_ptr)() ? "foo" : "bar");
85}
86
87void test(int a, int b, int c) {
88  (void)(a >> b + c); // expected-warning {{operator '>>' has lower precedence than '+'; '+' will be evaluated first}} \
89                         expected-note {{place parentheses around the '+' expression to silence this warning}}
90  // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:15-[[@LINE-2]]:15}:"("
91  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:20-[[@LINE-3]]:20}:")"
92
93  (void)(a - b << c); // expected-warning {{operator '<<' has lower precedence than '-'; '-' will be evaluated first}} \
94                         expected-note {{place parentheses around the '-' expression to silence this warning}}
95  // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:10-[[@LINE-2]]:10}:"("
96  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:15-[[@LINE-3]]:15}:")"
97
98  Stream() << b + c;
99  Stream() >> b + c; // expected-warning {{operator '>>' has lower precedence than '+'; '+' will be evaluated first}} \
100                        expected-note {{place parentheses around the '+' expression to silence this warning}}
101  // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:15-[[@LINE-2]]:15}:"("
102  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:20-[[@LINE-3]]:20}:")"
103}
104
105namespace PR15628 {
106  struct BlockInputIter {
107    void* operator++(int);
108    void* operator--(int);
109  };
110
111  void test(BlockInputIter i) {
112    (void)(i++ ? true : false); // no-warning
113    (void)(i-- ? true : false); // no-warning
114  }
115}
116