Which C++ type trait checks whether a given type is an array type?
Options
- A. std::is_array
- B. std::rank
- C. std::extent
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
A. std::is_array
Detailed Explanation
Answer: (A) std::is_array
std::is_array is a C++ type trait provided by the <type_traits> header. It checks whether a specified type is an array type.
For example, std::is_array<int[5]>::value is true because int[5] is an array type.
For a normal type such as int, the result is false.
This is useful when generic or template code needs to behave differently depending on whether the supplied type is an array.