/////////////////////////////////////////////////////////
// Pointers.cpp - pointer constness                    //
//                                                     //
// demo for CSE687 - Object Oriented Design, Sp 2013   //
/////////////////////////////////////////////////////////

#include <string>
#include <iostream>

int main()
{
  // non-const pointer to non-const contents
  std::string* pStr = new std::string("non-const string in heap");
  *pStr += " - can be changed";
  std::cout << "\n  " << *pStr << "\n";
  std::string* pTemp1 = pStr;
  pStr = new std::string("can point to another non-const string");
  std::cout << "\n  " << *pStr << "\n";
  delete pTemp1;

  // non-const pointer to const contents
  const std::string* pConstStr = new std::string("const string in heap");
  // *pConstStr += " - won't compile, can't change contents";
  const std::string* pTemp2 = pConstStr;
  // can change address, e.g., point to new instance
  pConstStr = new std::string("can point to another const string in heap");
  std::cout << "\n  " << *pConstStr << "\n";
  delete pTemp2;

  // this is semantically same as previous case
  std::string const * pAnotherConstStr = new std::string("another const string in heap");

  // const pointer to const contents
  const std::string* const pConstAddressOfConstStr = new std::string("const pointer to another const string in heap");
  // *pConstAddressOfConstStr += " - can't be changed so this won't compile";
  // pConstAddressOfConstStr = new std::string("attempt to point to new instance"); won't compile
  std::cout << "\n  " << *pConstAddressOfConstStr << "\n\n\n";

  delete pStr;
  delete pConstStr;
  delete pAnotherConstStr;
  delete pConstAddressOfConstStr;
  return 0;
}