copy-elision.cpp

class CTest {
public:
	CTest() { puts("ctor"); }
	CTest(CTest &&rrRight) { puts("ctor-m"); } // move
	CTest & operator=(CTest &&rrRight) noexcept { puts("assign-m"); return *this; } // move
	CTest & operator=(CTest &rRight) { puts("assign"); return *this; } // copy (일반적으로 딥카피)
};

auto createTest1 = []() -> CTest
{
	CTest test;
	return test;
};
auto createTest2 = []() -> CTest
{
	return CTest();
};

CTest test1 = createTest1(); // NRVO(/O2)적용시 (1)ctor 미적용시 (1)ctor (2)ctor-m
CTest test2 = createTest2(); // RVO. (1)ctor