// 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}}
}
}
}
}