What is the purpose of std::is_same in C++?
Options
- A. It checks whether two types are the same
- B. It checks whether a type is an array
- C. It checks whether a variable is constant
- D. More than one of the above
- E. None of the above
Quiz Practice:
A. It checks whether two types are the same
Answer: (A) It checks whether two types are the same
std::is_same is a type trait used to determine whether two specified types are identical.
For example, std::is_same<int, int>::value returns true because both types are the same.
On the other hand, std::is_same<int, double>::value returns false.
This is particularly useful in generic programming when code needs to make compile-time decisions based on types.