readability-qualified-auto suggests const auto* when initializing an auto variable with a std::array iterator value that happens to be implemented as a raw pointer.

The suggested change is not portable, as the standard only requires that a contiguous_iterator be returned, which does not necessarily have to be a raw pointer.

Example:

#include <array>

int main()
{
    std::array<int, 3> array = {{0, 1, 2}};
    auto iter = array.cbegin();
    return *iter;
}

Clang-Tidy output:

[<source>:6:5: warning: 'auto iter' can be declared as 'const auto *iter' [readability-qualified-auto]]

Godbolt demo: https://godbolt.org/z/Taraa7zxK