// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
// SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
// SPDX-FileContributor: 2003-22 Bradley M. Bell
// ----------------------------------------------------------------------------


/*
Old simple vector example now used just for validation testing
*/
// BEGIN C++

// need this to define size_t
# include <cstddef>

// # include <vector>
// # define MySimpleVector std::vector

// # include <valarray>
// # define MySimpleVector std::valarray

# include <cppad/utility/vector.hpp>
# define MySimpleVector CppAD::vector

// Assuming Boost (http://www.boost.org) is installed
// # include <boost/numeric/ublas/vector.hpp>
// # define MySimpleVector boost::numeric::ublas::vector

// A special type of element that counts assignment operations
class MyInt {
public:
   // constructors
   MyInt(void)       : count(0), value(0)
   { }
   MyInt(int _value) : count(0), value(_value)
   { }
   // assignment operator
   MyInt& operator=(const MyInt &x)
   {  value = x.value;
      count++;
      return *this;
   }
   // equality operator
   bool operator==(const MyInt &x) const
   {  return value == x.value; }

   int Value(void) const
   {  return value; }
   size_t Count(void) const
   {  return count; }
private:
   size_t count;  // count number of assignments
   int    value;  // value of this object
};

// Test of a Simple Vector template class
bool SimpleVector(void)
{  bool ok = true;
   typedef MySimpleVector<MyInt> vector;    // class we are testing
   typedef vector::value_type myInt;        // type of elements

   vector x;                // default constructor
   ok &= (x.size() == 0);

   x.resize(2);             // resize and set element assignment
   ok &= (x.size() == 2);
   x[0] = myInt(0);
   x[1] = myInt(1);

   vector y(2);             // sizing constructor
   ok &= (y.size() == 2);

   const vector z(x);       // copy constructor and const element access
   ok &= (z.size() == 2);
   ok &= ( (z[0] == myInt(0)) && (z[1] == myInt(1)) );

   // check that vector assignment
   x[0] = 2;                      // modify so that assignment changes x
   size_t x0count = x[0].Count(); // store initial counts
   size_t y1count = y[1].Count();
   size_t z0count = z[0].Count();
   x = y = z;                     // vector assignment

   // check resulting values
   ok &= ( (x[0] == myInt(0)) && (x[1] == myInt(1)) );
   ok &= ( (y[0] == myInt(0)) && (y[1] == myInt(1)) );
   ok &= ( (z[0] == myInt(0)) && (z[1] == myInt(1)) );

   // check that MyInt assignment was called (not raw memory copy)
   ok &= (x[0].Count() == x0count + 1);
   ok &= (y[1].Count() == y1count + 1);
   ok &= (z[0].Count() == z0count);

   return ok;
}

// END C++
