How do I use in constexpr contexts std::array in C++?

In C++, the std::array can be a useful container to store fixed-size arrays while also benefiting from better type safety and functionality. Starting from C++11 and further improved in the following standards, std::array can be utilized in constexpr contexts to facilitate compile-time computations.

Here’s a simple example demonstrating how to use std::array in a constexpr context:

#include <array> #include <iostream> constexpr std::array createArray() { std::array arr = {0, 1, 2, 3, 4}; return arr; } int main() { constexpr auto myArray = createArray(); for (const auto& elem : myArray) { std::cout << elem << ' '; } return 0; }

std::array constexpr C++ fixed-size array compile-time

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