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llvm-project/clang/test/Sema/parentheses.cpp

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// RUN: %clang_cc1 -Wparentheses -fsyntax-only -verify %s
// RUN: %clang_cc1 -Wparentheses -fsyntax-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
bool someConditionFunc();
void conditional_op(int x, int y, bool b) {
(void)(x + someConditionFunc() ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} \
// expected-note {{place parentheses around the '+' expression to silence this warning}} \
// expected-note {{place parentheses around the '?:' expression to evaluate it first}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:33-[[@LINE-4]]:33}:")"
// CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:41-[[@LINE-6]]:41}:")"
(void)(x - b ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '-'}} \
// expected-note {{place parentheses around the '-' expression to silence this warning}} \
// expected-note {{place parentheses around the '?:' expression to evaluate it first}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:15-[[@LINE-4]]:15}:")"
// CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:23-[[@LINE-6]]:23}:")"
(void)(x * (x == y) ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '*'}} \
// expected-note {{place parentheses around the '*' expression to silence this warning}} \
// expected-note {{place parentheses around the '?:' expression to evaluate it first}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:22-[[@LINE-4]]:22}:")"
// CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:14-[[@LINE-5]]:14}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:30-[[@LINE-6]]:30}:")"
}
class Stream {
public:
operator int();
Stream &operator<<(int);
Stream &operator<<(const char*);
Stream &operator>>(int);
Stream &operator>>(const char*);
};
void f(Stream& s, bool b) {
(void)(s << b ? "foo" : "bar"); // expected-warning {{operator '?:' has lower precedence than '<<'}} \
// expected-note {{place parentheses around the '<<' expression to silence this warning}} \
// expected-note {{place parentheses around the '?:' expression to evaluate it first}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")"
// CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:32-[[@LINE-6]]:32}:")"
(void)(s << 5 == 1); // expected-warning {{overloaded operator << has higher precedence than comparison operator}} \
// expected-note {{place parentheses around the '<<' expression to silence this warning}} \
// expected-note {{place parentheses around comparison expression to evaluate it first}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")"
// CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:21-[[@LINE-6]]:21}:")"
(void)(s >> 5 == 1); // expected-warning {{overloaded operator >> has higher precedence than comparison operator}} \
// expected-note {{place parentheses around the '>>' expression to silence this warning}} \
// expected-note {{place parentheses around comparison expression to evaluate it first}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:16-[[@LINE-4]]:16}:")"
// CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:21-[[@LINE-6]]:21}:")"
}
struct S {
operator int() { return 42; }
friend S operator+(const S &lhs, bool) { return S(); }
};
void test(S *s, bool (S::*m_ptr)()) {
(void)(*s + true ? "foo" : "bar"); // expected-warning {{operator '?:' has lower precedence than '+'}} \
// expected-note {{place parentheses around the '+' expression to silence this warning}} \
// expected-note {{place parentheses around the '?:' expression to evaluate it first}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:10-[[@LINE-3]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:19-[[@LINE-4]]:19}:")"
// CHECK: fix-it:"{{.*}}":{[[@LINE-5]]:15-[[@LINE-5]]:15}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-6]]:35-[[@LINE-6]]:35}:")"
(void)((*s + true) ? "foo" : "bar"); // No warning.
// Don't crash on unusual member call expressions.
(void)((s->*m_ptr)() ? "foo" : "bar");
}
void test(int a, int b, int c) {
(void)(a >> b + c); // expected-warning {{operator '>>' has lower precedence than '+'; '+' will be evaluated first}} \
expected-note {{place parentheses around the '+' expression to silence this warning}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:15-[[@LINE-2]]:15}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:20-[[@LINE-3]]:20}:")"
(void)(a - b << c); // expected-warning {{operator '<<' has lower precedence than '-'; '-' will be evaluated first}} \
expected-note {{place parentheses around the '-' expression to silence this warning}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:10-[[@LINE-2]]:10}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:15-[[@LINE-3]]:15}:")"
Stream() << b + c;
Stream() >> b + c; // expected-warning {{operator '>>' has lower precedence than '+'; '+' will be evaluated first}} \
expected-note {{place parentheses around the '+' expression to silence this warning}}
// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:15-[[@LINE-2]]:15}:"("
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:20-[[@LINE-3]]:20}:")"
}
namespace PR15628 {
struct BlockInputIter {
void* operator++(int);
void* operator--(int);
};
void test(BlockInputIter i) {
(void)(i++ ? true : false); // no-warning
(void)(i-- ? true : false); // no-warning
}
}
namespace PR20735 {
struct X {
static int state;
static int get();
int get_num();
int num;
};
namespace ns {
int num = 0;
int get();
}
void test(X x) {
if (5 & x.get_num() != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:29-[[@LINE-6]]:29}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:24-[[@LINE-9]]:24}:")"
if (5 & x.num != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:23-[[@LINE-6]]:23}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:18-[[@LINE-9]]:18}:")"
if (5 & x.state != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:25-[[@LINE-6]]:25}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:20-[[@LINE-9]]:20}:")"
if (5 & x.get() != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:25-[[@LINE-6]]:25}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:20-[[@LINE-9]]:20}:")"
if (5 & X::state != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:26-[[@LINE-6]]:26}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:21-[[@LINE-9]]:21}:")"
if (5 & X::get() != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:26-[[@LINE-6]]:26}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:21-[[@LINE-9]]:21}:")"
if (5 & ns::get() != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:27-[[@LINE-6]]:27}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:22-[[@LINE-9]]:22}:")"
if (5 & ns::num != 0) {}
// expected-warning@-1 {{& has lower precedence than !=; != will be evaluated first}}
// expected-note@-2 {{place parentheses around the '!=' expression to silence this warning}}
// expected-note@-3 {{place parentheses around the & expression to evaluate it first}}
// CHECK: place parentheses around the '!=' expression to silence this warning
// fix-it:"{{.*}}":{[[@LINE-5]]:13-[[@LINE-5]]:13}:"("
// fix-it:"{{.*}}":{[[@LINE-6]]:25-[[@LINE-6]]:25}:")"
// CHECK: place parentheses around the & expression to evaluate it first
// fix-it:"{{.*}}":{[[@LINE-8]]:9-[[@LINE-8]]:9}:"("
// fix-it:"{{.*}}":{[[@LINE-9]]:20-[[@LINE-9]]:20}:")"
}
}
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