The four ways to cast.

• This is covered in chapter 11 (P 357)
• And a reference
• The C style cast
  • The first cast was (type) expression
  • This was hard to work with.
• The C++ style cast
  • First c++ type of cast
  • type (expression)
  • This was better but always confusing with multi word types.
• static_cast
  • static_cast<type>(expression)
  • There are a set of rules here
  • But this is mostly for when a known conversion exists
  • That is "safe"
  • And does not rely on a vtable
  • This is your stand in replacement for the c++ cast.
• const_cast
  • This trows away constant-ness.
  • This should be used with extreme caution.
• dynamic_cast
  • For runtime casting.
  • Looks at the vtable and see if the cast is possible.
  • If so, do it and return the new pointer.
  • Of not, return nullptr.
  • This is perfect for what we are doing.
• reinterpret_cast
  • Do stuff you really shouldn't do.
  • Including casts that are not allowed in c++.
  • cast the bits of a float to the bits of an int.
  • You are generally warned against doing this.