C++ binary operations test

#include <stdio.h>
template <class T>
struct test_obj {};
template <>
struct test_obj<signed int> {
    const char *get() const {
        return "int";
    }
};

template <>
struct test_obj<unsigned int> {
    const char *get() const {
        return "unsigned int";
    }
};

template <typename T>
test_obj<T> tst(T) {
    return test_obj<T>();
}

int main() {
    puts(tst(1 << 31u).get());
}