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 5 void 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 13 void 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 32 (void)(i | i & i); // expected-warning {{'&' within '|'}} \ 33 // expected-note {{place parentheses around the '&' expression to silence this warning}} 34 35 (void)(i || 36 i && i); // expected-warning {{'&&' within '||'}} \ 37 // expected-note {{place parentheses around the '&&' expression to silence this warning}} 38 (void)(i || i && "w00t"); // no warning. 39 (void)("w00t" && i || i); // no warning. 40 (void)(i || i && "w00t" || i); // expected-warning {{'&&' within '||'}} \ 41 // expected-note {{place parentheses around the '&&' expression to silence this warning}} 42 (void)(i || "w00t" && i || i); // expected-warning {{'&&' within '||'}} \ 43 // expected-note {{place parentheses around the '&&' expression to silence this warning}} 44 (void)(i && i || 0); // no warning. 45 (void)(0 || i && i); // no warning. 46 } 47 48 _Bool someConditionFunc(); 49 50 void conditional_op(int x, int y, _Bool b) { 51 (void)(x + someConditionFunc() ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} \ 52 // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \ 53 // expected-note {{place parentheses around the '+' expression to silence this warning}} 54 55 (void)((x + someConditionFunc()) ? 1 : 2); // no warning 56 57 (void)(x - b ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '-'}} \ 58 // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \ 59 // expected-note {{place parentheses around the '-' expression to silence this warning}} 60 61 (void)(x * (x == y) ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '*'}} \ 62 // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \ 63 // expected-note {{place parentheses around the '*' expression to silence this warning}} 64 65 (void)(x / !x ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '/'}} \ 66 // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \ 67 // expected-note {{place parentheses around the '/' expression to silence this warning}} 68 69 (void)(x % 2 ? 1 : 2); // no warning 70 } 71 72 // RUN: %clang_cc1 -fsyntax-only -Wparentheses -Werror -fdiagnostics-show-option %s 2>&1 | FileCheck %s 73 // CHECK: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses] 74
