Why can't std::tuple be trivially copyable?

Question

Built with this online compiler, the following code:

#include 
#include 
#include 

int main() {
    std::cou         


        

Answer 1

Because std::tuple has copy/move ctor and assignment operators, it makes the class not-trivially-copyable.

See cpp reference:

A trivially copyable class is a class that

Has no non-trivial copy constructors (this also requires no virtual functions or virtual bases)
Has no non-trivial move constructors
Has no non-trivial copy assignment operators
Has no non-trivial move assignment operators
Has a trivial destructor

But std::tuple has all of the above constructors and assignment operators.