为什么int不能通过reinterpret_cast转换为struct呢

Question

如下代码：reinterpret_cast不是二进制重新解释吗？为什么int不能转换为struct呢？

typedef struct {
    uint32_t num : 1;
    uint32_t unused : 31;
} Test;

int main(){
    uint32_t test_num = 1;
    //Test tte;
    //memcpy(&tte, &test_num, sizeof(test_num)); //这样可以正确拷贝
    Test tte = reinterpret_cast<Test*>(&test_num); //但是这样就报错：错误：conversion from ‘Test*’ to non-scalar type ‘Test’ requested
    printf("%d,%d\n", tte.num, tte.unused);

Answer 1

Test tte = reinterpret_cast<Test*>(&test_num); ==>
Test *tte = reinterpret_cast<Test*>(&test_num);