Which C++ type trait removes all array dimensions from an array type?
Options
- A. std::remove_extent
- B. std::remove_all_extents
- C. std::rank
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
B. std::remove_all_extents
Detailed Explanation
Answer: (B) std::remove_all_extents
std::remove_all_extents removes all array dimensions from an array type.
For example, if the type is int[2][3][4], applying std::remove_all_extents produces the underlying element type int.
This differs from std::remove_extent, which removes only the outermost array dimension.
These traits are useful in generic and template programming when the underlying element type is required.