For the following code:
-------------------------
class Foo {
public:
    Foo() { printf("ctor\n"); }
    ~Foo() { printf("dtor\n"); }
};

/*
 * 
 */
int main(int argc, char** argv)
{
    Foo foo1();
    Foo* foo2 = new Foo();
    foo2->~Foo();
    delete foo2;
    return 0;
}
-------------------------
if you ask it to 'find usages" for the constructor, it cannot find 'Foo foo1();' although it can find the constructor in 'Foo* foo2 = new Foo();'

if you ask it to 'find usages" for the destructor, it cannot find either instance.