問題：
When creating local variables, is it correct to use (const) auto& or auto ?創建局部變量時，使用(const) auto&或auto是否正確？
eg:例如：
SomeClass object;
const auto result = object.SomeMethod();
or const auto& result = object.SomeMethod();或const auto& result = object.SomeMethod();
Where SomeMethod() returns a non-primitive value - maybe another user-defined type. SomeMethod() 返回一個非原始值 - 可能是另一個用戶定義的類型。 My understanding is that const auto& result is correct since the result returned by SomeMethod() would call the copy constructor for the returned type.我的理解是const auto& result是正確的，因爲 SomeMethod() 返回的結果會調用返回類型的複製構造函數。 Please correct me if I am wrong.如果我錯了，請糾正我。
What about for primitive types?對於原始類型呢？ I assume const auto sum = 1 + 2;我假設const auto sum = 1 + 2; is correct.是正確的。
Does this also apply to range based for loops?這是否也適用於基於範圍的 for 循環？
for(const auto& object : objects)