How do I write compile-time data structures?

In C++, you can create compile-time data structures using templates and constexpr. This technique allows you to define data structures that are evaluated at compile time, improving performance and memory efficiency.

Here's an example of a simple compile-time data structure using a constexpr array:

template struct CompileTimeArray { constexpr CompileTimeArray(const int (&arr)[N]) { for (size_t i = 0; i < N; ++i) { data[i] = arr[i]; } } constexpr int get(size_t index) const { return data[index]; } int data[N]; }; // Usage constexpr int myData[] = {1, 2, 3, 4, 5}; constexpr CompileTimeArray<5> myArray(myData); constexpr int value = myArray.get(2); // value will be 3 at compile time

C++ compile-time data structures templates constexpr performance efficiency

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