More explicit type conversion

etc.cpp

#include <new>

struct Parent { };
struct Child : Parent { };

struct Tag { };

int main()
{
    const Child c;
    Parent& p1 = const_cast<Parent&>(static_cast<Parent const&>(c));
    Parent& p2 = (Parent&)c; // same as initializer for p1
    
    const char buf[sizeof(Tag)]{};
    new ((void*)buf) Tag();
    
    Tag* tag1 = const_cast<Tag*>(reinterpret_cast<Tag const*>(buf));
    Tag* tag2 = (Tag*)buf;  // same as initializer for tag1
}

The different C++ casts a C style cast will go through:

const_cast
static_cast
static_cast followed by const_cast
reinterpret_cast
reinterpret_cast followed by const_cast

It looks for the first viable cast for the conversion.