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#include <iostream>
template<typename T>
class Wrapper
{
public:
Wrapper(T const& value) : value_(value) {}
T const& get() const { return value_; }
private:
T value_;
};
int main()
{
using IntRefWrapper = Wrapper<int&>;
int a = 42;
IntRefWrapper intRefWrapper(a);
intRefWrapper.get() = 43;
std::cout << "a is now " << a << '\n';
}
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