parentheses.c revision 567bb71a01bcf178c6fcabb3eecf7a8c4f71e674 
1// RUN: %clang_cc1 -Wparentheses -fsyntax-only -verify %s
2// RUN: %clang_cc1 -Wparentheses -fixit %s -o - | %clang_cc1 -Wparentheses -Werror -
3
4// Test the various warnings under -Wparentheses
5void if_assign(void) {
6  int i;
7  if (i = 4) {} // expected-warning {{assignment as a condition}} \
8                // expected-note{{use '==' to turn this assignment into an equality comparison}} \
9  // expected-note{{place parentheses around the assignment to silence this warning}}
10  if ((i = 4)) {}
11}
12
13void bitwise_rel(unsigned i) {
14  (void)(i & 0x2 == 0); // expected-warning {{& has lower precedence than ==}} \
15                        // expected-note{{place parentheses around the & expression to evaluate it first}} \
16  // expected-note{{place parentheses around the == expression to silence this warning}}
17  (void)(0 == i & 0x2); // expected-warning {{& has lower precedence than ==}} \
18                        // expected-note{{place parentheses around the & expression to evaluate it first}} \
19  // expected-note{{place parentheses around the == expression to silence this warning}}
20  (void)(i & 0xff < 30); // expected-warning {{& has lower precedence than <}} \
21                        // expected-note{{place parentheses around the & expression to evaluate it first}} \
22  // expected-note{{place parentheses around the < expression to silence this warning}}
23  (void)((i & 0x2) == 0);
24  (void)(i & (0x2 == 0));
25  // Eager logical op
26  (void)(i == 1 | i == 2 | i == 3);
27  (void)(i != 1 & i != 2 & i != 3);
28
29  (void)(i || i && i); // expected-warning {{'&&' within '||'}} \
30                       // expected-note {{place parentheses around the '&&' expression to silence this warning}}
31  (void)(i || i && "w00t"); // no warning.
32  (void)("w00t" && i || i); // no warning.
33  (void)(i || i && "w00t" || i); // expected-warning {{'&&' within '||'}} \
34                                 // expected-note {{place parentheses around the '&&' expression to silence this warning}}
35  (void)(i || "w00t" && i || i); // expected-warning {{'&&' within '||'}} \
36                                 // expected-note {{place parentheses around the '&&' expression to silence this warning}}
37}
38