#include <memory>
struct Foo
{
    int m_field1;
    Foo(int field1):m_field1(field1){};
};
 
struct BitField {
    struct {
        unsigned long   Field1:31;
        unsigned long   Field2:1;
    } DUMMY;
};
int main()
{
    BitField *p = new BitField();
    //This Line compiles
    auto sp1 = std::shared_ptr<Foo>(new Foo((unsigned long)p->DUMMY.Field1));
    //But std::make_shared fails to compile
    auto sp2 = std::make_shared<Foo>((unsigned long)p->DUMMY.Field1);
    return 0;
}

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