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// RUN: %check_clang_tidy %s performance-move-const-arg %t \
// RUN: -config='{CheckOptions: \
// RUN: [{key: performance-move-const-arg.CheckTriviallyCopyableMove, value: 0}]}' \
// RUN: -- -std=c++14
namespace std {
template <typename> struct remove_reference;
template <typename _Tp> struct remove_reference { typedef _Tp type; };
template <typename _Tp> struct remove_reference<_Tp &> { typedef _Tp type; };
template <typename _Tp> struct remove_reference<_Tp &&> { typedef _Tp type; };
template <typename _Tp>
constexpr typename std::remove_reference<_Tp>::type &&move(_Tp &&__t) {
return static_cast<typename std::remove_reference<_Tp>::type &&>(__t);
}
template <typename _Tp>
constexpr _Tp &&
forward(typename remove_reference<_Tp>::type &__t) noexcept {
return static_cast<_Tp &&>(__t);
}
} // namespace std
class NoMoveSemantics {
public:
NoMoveSemantics();
NoMoveSemantics(const NoMoveSemantics &);
NoMoveSemantics &operator=(const NoMoveSemantics &);
};
void callByConstRef(const NoMoveSemantics &);
void callByConstRef(int i, const NoMoveSemantics &);
void moveToConstReferencePositives() {
NoMoveSemantics obj;
// Basic case. It is here just to have a single "detected and fixed" case.
callByConstRef(std::move(obj));
// CHECK-MESSAGES: :[[@LINE-1]]:18: warning: passing result of std::move() as a const reference argument; no move will actually happen [performance-move-const-arg]
// CHECK-FIXES: callByConstRef(obj);
}
struct TriviallyCopyable {
int i;
};
void f(TriviallyCopyable) {}
void g() {
TriviallyCopyable obj;
f(std::move(obj));
}
class MoveSemantics {
public:
MoveSemantics();
MoveSemantics(MoveSemantics &&);
MoveSemantics &operator=(MoveSemantics &&);
};
void fmovable(MoveSemantics);
void lambda1() {
auto f = [](MoveSemantics m) {
fmovable(std::move(m));
};
f(MoveSemantics());
}
template<class T> struct function {};
template<typename Result, typename... Args>
class function<Result(Args...)> {
public:
function() = default;
void operator()(Args... args) const {
fmovable(std::forward<Args>(args)...);
}
};
void functionInvocation() {
function<void(MoveSemantics)> callback;
MoveSemantics m;
callback(std::move(m));
}
void lambda2() {
function<void(MoveSemantics)> callback;
auto f = [callback = std::move(callback)](MoveSemantics m) mutable {
callback(std::move(m));
};
f(MoveSemantics());
}
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