37. Unrelated types conversion: reinterpret_cast

• The reinterpret_cast handles conversions between unrelated types, such as int to ptr*, etc.

• It produces value of a requested type with the same bit pattern.

• Use reinterpret_cast when you know you are doing something correct, and don't need the compiler to check:

  
      static const unsigned int IO_PORT_A = 0x00fc;
  
      Port* io_port = reinterpret_cast< Port* > IO_PORT_A;
  
  

• Using reinterpret_cast most likely is not portable!