+struct MovedFrom {
+ bool hasValue;
+ MovedFrom() : hasValue(true) {
+ }
+ MovedFrom(MovedFrom&& m) : hasValue(m.hasValue) {
+ m.hasValue = false;
+ }
+ MovedFrom &operator=(MovedFrom&& m) {
+ hasValue = m.hasValue;
+ m.hasValue = false;
+ return *this;
+ }
+};
+
+TEST(SmallVectorTest, MidInsert) {
+ SmallVector<MovedFrom, 3> v;
+ v.push_back(MovedFrom());
+ v.insert(v.begin(), MovedFrom());
+ for (MovedFrom &m : v)
+ EXPECT_TRUE(m.hasValue);
+}
+
+enum EmplaceableArgState {
+ EAS_Defaulted,
+ EAS_Arg,
+ EAS_LValue,
+ EAS_RValue,
+ EAS_Failure
+};
+template <int I> struct EmplaceableArg {
+ EmplaceableArgState State;
+ EmplaceableArg() : State(EAS_Defaulted) {}
+ EmplaceableArg(EmplaceableArg &&X)
+ : State(X.State == EAS_Arg ? EAS_RValue : EAS_Failure) {}
+ EmplaceableArg(EmplaceableArg &X)
+ : State(X.State == EAS_Arg ? EAS_LValue : EAS_Failure) {}
+
+ explicit EmplaceableArg(bool) : State(EAS_Arg) {}
+
+private:
+ EmplaceableArg &operator=(EmplaceableArg &&) LLVM_DELETED_FUNCTION;
+ EmplaceableArg &operator=(const EmplaceableArg &) LLVM_DELETED_FUNCTION;
+};
+
+enum EmplaceableState { ES_Emplaced, ES_Moved };
+struct Emplaceable {
+ EmplaceableArg<0> A0;
+ EmplaceableArg<1> A1;
+ EmplaceableArg<2> A2;
+ EmplaceableArg<3> A3;
+ EmplaceableState State;
+
+ Emplaceable() : State(ES_Emplaced) {}
+
+ template <class A0Ty>
+ explicit Emplaceable(A0Ty &&A0)
+ : A0(std::forward<A0Ty>(A0)), State(ES_Emplaced) {}
+
+ template <class A0Ty, class A1Ty>
+ Emplaceable(A0Ty &&A0, A1Ty &&A1)
+ : A0(std::forward<A0Ty>(A0)), A1(std::forward<A1Ty>(A1)),
+ State(ES_Emplaced) {}
+
+ template <class A0Ty, class A1Ty, class A2Ty>
+ Emplaceable(A0Ty &&A0, A1Ty &&A1, A2Ty &&A2)
+ : A0(std::forward<A0Ty>(A0)), A1(std::forward<A1Ty>(A1)),
+ A2(std::forward<A2Ty>(A2)), State(ES_Emplaced) {}
+
+ template <class A0Ty, class A1Ty, class A2Ty, class A3Ty>
+ Emplaceable(A0Ty &&A0, A1Ty &&A1, A2Ty &&A2, A3Ty &&A3)
+ : A0(std::forward<A0Ty>(A0)), A1(std::forward<A1Ty>(A1)),
+ A2(std::forward<A2Ty>(A2)), A3(std::forward<A3Ty>(A3)),
+ State(ES_Emplaced) {}
+
+ Emplaceable(Emplaceable &&) : State(ES_Moved) {}
+ Emplaceable &operator=(Emplaceable &&) {
+ State = ES_Moved;
+ return *this;
+ }
+
+private:
+ Emplaceable(const Emplaceable &) LLVM_DELETED_FUNCTION;
+ Emplaceable &operator=(const Emplaceable &) LLVM_DELETED_FUNCTION;
+};
+
+TEST(SmallVectorTest, EmplaceBack) {
+ EmplaceableArg<0> A0(true);
+ EmplaceableArg<1> A1(true);
+ EmplaceableArg<2> A2(true);
+ EmplaceableArg<3> A3(true);
+ {
+ SmallVector<Emplaceable, 3> V;
+ V.emplace_back();
+ EXPECT_TRUE(V.size() == 1);
+ EXPECT_TRUE(V.back().State == ES_Emplaced);
+ EXPECT_TRUE(V.back().A0.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A1.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+ }
+ {
+ SmallVector<Emplaceable, 3> V;
+ V.emplace_back(std::move(A0));
+ EXPECT_TRUE(V.size() == 1);
+ EXPECT_TRUE(V.back().State == ES_Emplaced);
+ EXPECT_TRUE(V.back().A0.State == EAS_RValue);
+ EXPECT_TRUE(V.back().A1.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+ }
+ {
+ SmallVector<Emplaceable, 3> V;
+ V.emplace_back(A0);
+ EXPECT_TRUE(V.size() == 1);
+ EXPECT_TRUE(V.back().State == ES_Emplaced);
+ EXPECT_TRUE(V.back().A0.State == EAS_LValue);
+ EXPECT_TRUE(V.back().A1.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+ }
+ {
+ SmallVector<Emplaceable, 3> V;
+ V.emplace_back(A0, A1);
+ EXPECT_TRUE(V.size() == 1);
+ EXPECT_TRUE(V.back().State == ES_Emplaced);
+ EXPECT_TRUE(V.back().A0.State == EAS_LValue);
+ EXPECT_TRUE(V.back().A1.State == EAS_LValue);
+ EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+ }
+ {
+ SmallVector<Emplaceable, 3> V;
+ V.emplace_back(std::move(A0), std::move(A1));
+ EXPECT_TRUE(V.size() == 1);
+ EXPECT_TRUE(V.back().State == ES_Emplaced);
+ EXPECT_TRUE(V.back().A0.State == EAS_RValue);
+ EXPECT_TRUE(V.back().A1.State == EAS_RValue);
+ EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
+ EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+ }
+ {
+ SmallVector<Emplaceable, 3> V;
+ V.emplace_back(std::move(A0), A1, std::move(A2), A3);
+ EXPECT_TRUE(V.size() == 1);
+ EXPECT_TRUE(V.back().State == ES_Emplaced);
+ EXPECT_TRUE(V.back().A0.State == EAS_RValue);
+ EXPECT_TRUE(V.back().A1.State == EAS_LValue);
+ EXPECT_TRUE(V.back().A2.State == EAS_RValue);
+ EXPECT_TRUE(V.back().A3.State == EAS_LValue);
+ }