'std::is_pointer of dereferenced double pointer [duplicate]

I have some code where i want to check for (accidental) double pointers in static_assert

#include<type_traits>


int main()
{
    using namespace std;
    float* arr[10];
    float ** pp;

    static_assert(!is_pointer<decltype(*arr)>::value, "double pointer detected");
    static_assert(!is_pointer<decltype(*pp)>::value, "double pointer detected");

}

I am curious why this compiles, as i was expecting the static_asserts to give an error.

c++pointersstatic-assertdouble-pointer


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