C++ 去掉const

#include 
#include 



template
class TypeTraits{
private:
    template class UnConst{
        public:
            typedef U Result;
    };

    template class UnConst{
        public:
            typedef U Result;
    };

public:
    typedef typename UnConst::Result NonConstType;
};


template
using NonConstType =  typename TypeTraits::NonConstType;

template
void Func(NonConstType t) {
    std::string* nonP = &t; // ok
    std::string& nonR = t; // ok

    std::cout<<*nonP<
void ForwardFunc(NonConstType t) {
    Func(t);
}


void Test(){
    const int a = 10;
    TypeTraits::NonConstType noConstVar;

    // int& nonConstRef = a; // error not bind const int to int&
    // int* nonConstP = &a; // error, invaild conversion from const int* to int
    
    int *p = &noConstVar; // ok

    const std::string str("hello");
    ForwardFunc(str);
}


int main(){
    Test();
}