72 lines
1.4 KiB
C++
72 lines
1.4 KiB
C++
|
// RUN: %clang_cc1 -fsyntax-only -verify -Wunused-value %s
|
||
|
|
|
||
|
|
// PR4806
|
||
|
|
namespace test0 {
|
||
|
|
class Box {
|
||
|
|
public:
|
||
|
|
int i;
|
||
|
|
volatile int j;
|
||
|
|
};
|
||
|
|
|
||
|
|
void doit() {
|
||
|
|
// pointer to volatile has side effect (thus no warning)
|
||
|
|
Box* box = new Box;
|
||
|
|
box->i; // expected-warning {{expression result unused}}
|
||
|
|
box->j; // expected-warning {{expression result unused}}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace test1 {
|
||
|
|
struct Foo {
|
||
|
|
int i;
|
||
|
|
bool operator==(const Foo& rhs) {
|
||
|
|
return i == rhs.i;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#define NOP(x) (x)
|
||
|
|
void b(Foo f1, Foo f2) {
|
||
|
|
NOP(f1 == f2); // expected-warning {{expression result unused}}
|
||
|
|
}
|
||
|
|
#undef NOP
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace test2 {
|
||
|
|
extern "C" {
|
||
|
|
namespace std {
|
||
|
|
template<typename T> struct basic_string {
|
||
|
|
struct X {};
|
||
|
|
void method() const {
|
||
|
|
X* x;
|
||
|
|
&x[0]; // expected-warning {{expression result unused}}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
typedef basic_string<char> string;
|
||
|
|
void func(const std::string& str) {
|
||
|
|
str.method(); // expected-note {{in instantiation of member function}}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace test3 {
|
||
|
|
struct Used {
|
||
|
|
Used();
|
||
|
|
Used(int);
|
||
|
|
Used(int, int);
|
||
|
|
};
|
||
|
|
struct __attribute__((warn_unused)) Unused {
|
||
|
|
Unused();
|
||
|
|
Unused(int);
|
||
|
|
Unused(int, int);
|
||
|
|
};
|
||
|
|
void f() {
|
||
|
|
Used();
|
||
|
|
Used(1);
|
||
|
|
Used(1, 1);
|
||
|
|
Unused(); // expected-warning {{expression result unused}}
|
||
|
|
Unused(1); // expected-warning {{expression result unused}}
|
||
|
|
Unused(1, 1); // expected-warning {{expression result unused}}
|
||
|
|
}
|
||
|
|
}
|