forked from OSchip/llvm-project
98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
// RUN: %check_clang_tidy %s performance-move-const-arg %t \
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// RUN: -config='{CheckOptions: \
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// RUN: [{key: performance-move-const-arg.CheckTriviallyCopyableMove, value: 0}]}'
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namespace std {
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template <typename> struct remove_reference;
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template <typename _Tp> struct remove_reference { typedef _Tp type; };
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template <typename _Tp> struct remove_reference<_Tp &> { typedef _Tp type; };
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template <typename _Tp> struct remove_reference<_Tp &&> { typedef _Tp type; };
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template <typename _Tp>
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constexpr typename std::remove_reference<_Tp>::type &&move(_Tp &&__t) {
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return static_cast<typename std::remove_reference<_Tp>::type &&>(__t);
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}
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template <typename _Tp>
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constexpr _Tp &&
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forward(typename remove_reference<_Tp>::type &__t) noexcept {
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return static_cast<_Tp &&>(__t);
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}
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} // namespace std
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class NoMoveSemantics {
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public:
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NoMoveSemantics();
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NoMoveSemantics(const NoMoveSemantics &);
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NoMoveSemantics &operator=(const NoMoveSemantics &);
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};
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void callByConstRef(const NoMoveSemantics &);
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void callByConstRef(int i, const NoMoveSemantics &);
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void moveToConstReferencePositives() {
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NoMoveSemantics obj;
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// Basic case. It is here just to have a single "detected and fixed" case.
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callByConstRef(std::move(obj));
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// 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]
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// CHECK-FIXES: callByConstRef(obj);
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}
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struct TriviallyCopyable {
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int i;
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};
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void f(TriviallyCopyable) {}
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void g() {
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TriviallyCopyable obj;
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f(std::move(obj));
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}
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class MoveSemantics {
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public:
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MoveSemantics();
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MoveSemantics(MoveSemantics &&);
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MoveSemantics &operator=(MoveSemantics &&);
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};
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void fmovable(MoveSemantics);
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void lambda1() {
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auto f = [](MoveSemantics m) {
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fmovable(std::move(m));
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};
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f(MoveSemantics());
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}
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template<class T> struct function {};
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template<typename Result, typename... Args>
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class function<Result(Args...)> {
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public:
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function() = default;
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void operator()(Args... args) const {
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fmovable(std::forward<Args>(args)...);
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}
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};
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void functionInvocation() {
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function<void(MoveSemantics)> callback;
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MoveSemantics m;
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callback(std::move(m));
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}
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void lambda2() {
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function<void(MoveSemantics)> callback;
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auto f = [callback = std::move(callback)](MoveSemantics m) mutable {
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callback(std::move(m));
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};
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f(MoveSemantics());
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}
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