forked from OSchip/llvm-project
74 lines
4.3 KiB
C
74 lines
4.3 KiB
C
// RUN: %clang_cc1 -Wparentheses -fsyntax-only -verify %s
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// RUN: %clang_cc1 -Wparentheses -fixit %s -o - | %clang_cc1 -Wparentheses -Werror -
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// Test the various warnings under -Wparentheses
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void if_assign(void) {
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int i;
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if (i = 4) {} // expected-warning {{assignment as a condition}} \
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// expected-note{{use '==' to turn this assignment into an equality comparison}} \
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// expected-note{{place parentheses around the assignment to silence this warning}}
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if ((i = 4)) {}
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}
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void bitwise_rel(unsigned i) {
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(void)(i & 0x2 == 0); // expected-warning {{& has lower precedence than ==}} \
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// expected-note{{place parentheses around the & expression to evaluate it first}} \
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// expected-note{{place parentheses around the '==' expression to silence this warning}}
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(void)(0 == i & 0x2); // expected-warning {{& has lower precedence than ==}} \
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// expected-note{{place parentheses around the & expression to evaluate it first}} \
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// expected-note{{place parentheses around the '==' expression to silence this warning}}
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(void)(i & 0xff < 30); // expected-warning {{& has lower precedence than <}} \
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// expected-note{{place parentheses around the & expression to evaluate it first}} \
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// expected-note{{place parentheses around the '<' expression to silence this warning}}
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(void)((i & 0x2) == 0);
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(void)(i & (0x2 == 0));
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// Eager logical op
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(void)(i == 1 | i == 2 | i == 3);
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(void)(i != 1 & i != 2 & i != 3);
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(void)(i & i | i); // expected-warning {{'&' within '|'}} \
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// expected-note {{place parentheses around the '&' expression to silence this warning}}
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(void)(i | i & i); // expected-warning {{'&' within '|'}} \
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// expected-note {{place parentheses around the '&' expression to silence this warning}}
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(void)(i ||
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i && i); // expected-warning {{'&&' within '||'}} \
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// expected-note {{place parentheses around the '&&' expression to silence this warning}}
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(void)(i || i && "w00t"); // no warning.
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(void)("w00t" && i || i); // no warning.
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(void)(i || i && "w00t" || i); // expected-warning {{'&&' within '||'}} \
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// expected-note {{place parentheses around the '&&' expression to silence this warning}}
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(void)(i || "w00t" && i || i); // expected-warning {{'&&' within '||'}} \
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// expected-note {{place parentheses around the '&&' expression to silence this warning}}
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(void)(i && i || 0); // no warning.
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(void)(0 || i && i); // no warning.
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}
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_Bool someConditionFunc();
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void conditional_op(int x, int y, _Bool b) {
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(void)(x + someConditionFunc() ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} \
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// expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
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// expected-note {{place parentheses around the '+' expression to silence this warning}}
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(void)((x + someConditionFunc()) ? 1 : 2); // no warning
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(void)(x - b ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '-'}} \
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// expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
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// expected-note {{place parentheses around the '-' expression to silence this warning}}
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(void)(x * (x == y) ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '*'}} \
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// expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
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// expected-note {{place parentheses around the '*' expression to silence this warning}}
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(void)(x / !x ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '/'}} \
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// expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
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// expected-note {{place parentheses around the '/' expression to silence this warning}}
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(void)(x % 2 ? 1 : 2); // no warning
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}
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// RUN: %clang_cc1 -fsyntax-only -Wparentheses -Werror -fdiagnostics-show-option %s 2>&1 | FileCheck %s
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// CHECK: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses]
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