| 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 | |
| 4 | // Test the various warnings under -Wparentheses |
| 5 | void if_assign(void) { |
| 6 | int i; |
| 7 | if (i = 4) {} // expected-warning {{assignment as a condition}} \ |
| 8 | // expected-note{{place parentheses around the assignment to silence this warning}} \ |
| 9 | // expected-note{{use '==' to turn this assignment into an equality comparison}} |
| 10 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:7-[[@LINE-3]]:7}:"(" |
| 11 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:12-[[@LINE-4]]:12}:")" |
| 12 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:9-[[@LINE-5]]:10}:"==" |
| 13 | |
| 14 | if ((i = 4)) {} |
| 15 | } |
| 16 | |
| 17 | void bitwise_rel(unsigned i) { |
| 18 | (void)(i & 0x2 == 0); // expected-warning {{& has lower precedence than ==}} \ |
| 19 | // expected-note{{place parentheses around the '==' expression to silence this warning}} \ |
| 20 | // expected-note{{place parentheses around the & expression to evaluate it first}} |
| 21 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:14-[[@LINE-3]]:14}:"(" |
| 22 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:22-[[@LINE-4]]:22}:")" |
| 23 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:10-[[@LINE-5]]:10}:"(" |
| 24 | // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:17-[[@LINE-6]]:17}:")" |
| 25 | |
| 26 | (void)(0 == i & 0x2); // expected-warning {{& has lower precedence than ==}} \ |
| 27 | // expected-note{{place parentheses around the '==' expression to silence this warning}} \ |
| 28 | // expected-note{{place parentheses around the & expression to evaluate it first}} |
| 29 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"(" |
| 30 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")" |
| 31 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"(" |
| 32 | // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:22-[[@LINE-6]]:22}:")" |
| 33 | |
| 34 | (void)(i & 0xff < 30); // expected-warning {{& has lower precedence than <}} \ |
| 35 | // expected-note{{place parentheses around the '<' expression to silence this warning}} \ |
| 36 | // expected-note{{place parentheses around the & expression to evaluate it first}} |
| 37 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:14-[[@LINE-3]]:14}:"(" |
| 38 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:23-[[@LINE-4]]:23}:")" |
| 39 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:10-[[@LINE-5]]:10}:"(" |
| 40 | // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:18-[[@LINE-6]]:18}:")" |
| 41 | |
| 42 | (void)((i & 0x2) == 0); |
| 43 | (void)(i & (0x2 == 0)); |
| 44 | // Eager logical op |
| 45 | (void)(i == 1 | i == 2 | i == 3); |
| 46 | (void)(i != 1 & i != 2 & i != 3); |
| 47 | |
| 48 | (void)(i & i | i); // expected-warning {{'&' within '|'}} \ |
| 49 | // expected-note {{place parentheses around the '&' expression to silence this warning}} |
| 50 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:10-[[@LINE-2]]:10}:"(" |
| 51 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:15-[[@LINE-3]]:15}:")" |
| 52 | |
| 53 | (void)(i | i & i); // expected-warning {{'&' within '|'}} \ |
| 54 | // expected-note {{place parentheses around the '&' expression to silence this warning}} |
| 55 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:14-[[@LINE-2]]:14}:"(" |
| 56 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:19-[[@LINE-3]]:19}:")" |
| 57 | |
| 58 | (void)(i ^ i | i); // expected-warning {{'^' within '|'}} \ |
| 59 | // expected-note {{place parentheses around the '^' expression to silence this warning}} |
| 60 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:10-[[@LINE-2]]:10}:"(" |
| 61 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:15-[[@LINE-3]]:15}:")" |
| 62 | |
| 63 | (void)(i | i ^ i); // expected-warning {{'^' within '|'}} \ |
| 64 | // expected-note {{place parentheses around the '^' expression to silence this warning}} |
| 65 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:14-[[@LINE-2]]:14}:"(" |
| 66 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:19-[[@LINE-3]]:19}:")" |
| 67 | |
| 68 | (void)(i & i ^ i); // expected-warning {{'&' within '^'}} \ |
| 69 | // expected-note {{place parentheses around the '&' expression to silence this warning}} |
| 70 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:10-[[@LINE-2]]:10}:"(" |
| 71 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:15-[[@LINE-3]]:15}:")" |
| 72 | |
| 73 | (void)(i ^ i & i); // expected-warning {{'&' within '^'}} \ |
| 74 | // expected-note {{place parentheses around the '&' expression to silence this warning}} |
| 75 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:14-[[@LINE-2]]:14}:"(" |
| 76 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:19-[[@LINE-3]]:19}:")" |
| 77 | |
| 78 | (void)(i || |
| 79 | i && i); // expected-warning {{'&&' within '||'}} \ |
| 80 | // expected-note {{place parentheses around the '&&' expression to silence this warning}} |
| 81 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:14-[[@LINE-2]]:14}:"(" |
| 82 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:20-[[@LINE-3]]:20}:")" |
| 83 | |
| 84 | (void)(i || i && "w00t"); // no warning. |
| 85 | (void)("w00t" && i || i); // no warning. |
| 86 | |
| 87 | (void)(i || i && "w00t" || i); // expected-warning {{'&&' within '||'}} \ |
| 88 | // expected-note {{place parentheses around the '&&' expression to silence this warning}} |
| 89 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:15-[[@LINE-2]]:15}:"(" |
| 90 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:26-[[@LINE-3]]:26}:")" |
| 91 | |
| 92 | (void)(i || "w00t" && i || i); // expected-warning {{'&&' within '||'}} \ |
| 93 | // expected-note {{place parentheses around the '&&' expression to silence this warning}} |
| 94 | // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:15-[[@LINE-2]]:15}:"(" |
| 95 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:26-[[@LINE-3]]:26}:")" |
| 96 | |
| 97 | (void)(i && i || 0); // no warning. |
| 98 | (void)(0 || i && i); // no warning. |
| 99 | } |
| 100 | |
| 101 | _Bool someConditionFunc(); |
| 102 | |
| 103 | void conditional_op(int x, int y, _Bool b, void* p) { |
| 104 | (void)(x + someConditionFunc() ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} \ |
| 105 | // expected-note {{place parentheses around the '+' expression to silence this warning}} \ |
| 106 | // expected-note {{place parentheses around the '?:' expression to evaluate it first}} |
| 107 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"(" |
| 108 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:33-[[@LINE-4]]:33}:")" |
| 109 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"(" |
| 110 | // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:41-[[@LINE-6]]:41}:")" |
| 111 | |
| 112 | (void)((x + someConditionFunc()) ? 1 : 2); // no warning |
| 113 | |
| 114 | (void)(x - b ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '-'}} \ |
| 115 | // expected-note {{place parentheses around the '-' expression to silence this warning}} \ |
| 116 | // expected-note {{place parentheses around the '?:' expression to evaluate it first}} |
| 117 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"(" |
| 118 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:15-[[@LINE-4]]:15}:")" |
| 119 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"(" |
| 120 | // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:23-[[@LINE-6]]:23}:")" |
| 121 | |
| 122 | (void)(x * (x == y) ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '*'}} \ |
| 123 | // expected-note {{place parentheses around the '*' expression to silence this warning}} \ |
| 124 | // expected-note {{place parentheses around the '?:' expression to evaluate it first}} |
| 125 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"(" |
| 126 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:22-[[@LINE-4]]:22}:")" |
| 127 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"(" |
| 128 | // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:30-[[@LINE-6]]:30}:")" |
| 129 | |
| 130 | (void)(x / !x ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '/'}} \ |
| 131 | // expected-note {{place parentheses around the '/' expression to silence this warning}} \ |
| 132 | // expected-note {{place parentheses around the '?:' expression to evaluate it first}} |
| 133 | // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"(" |
| 134 | // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")" |
| 135 | // CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"(" |
| 136 | // CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:24-[[@LINE-6]]:24}:")" |
| 137 | |
| 138 | (void)(x % 2 ? 1 : 2); // no warning |
| 139 | |
| 140 | (void)(x + p ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} expected-note 2{{place parentheses}} |
| 141 | (void)(p + x ? 1 : 2); // no warning |
| 142 | |
| 143 | (void)(p + b ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} expected-note 2{{place parentheses}} |
| 144 | |
| 145 | (void)(x + y > 0 ? 1 : 2); // no warning |
| 146 | (void)(x + (y > 0) ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} expected-note 2{{place parentheses}} |
| 147 | } |
| 148 | |
| 149 | // RUN: not %clang_cc1 -fsyntax-only -Wparentheses -Werror -fdiagnostics-show-option %s 2>&1 | FileCheck %s -check-prefix=CHECK-FLAG |
| 150 | // CHECK-FLAG: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses] |
| 151 | |