\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)

simple_vector.cpp

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Simple Vector Template Class: Example and Test

# include <iostream>                   // std::cout and std::endl

# include <vector>                     // std::vector
# include <valarray>                   // std::valarray
# include <cppad/utility/vector.hpp>       // CppAD::vector
# include <cppad/utility/check_simple_vector.hpp>  // CppAD::CheckSimpleVector
namespace {
   template <class Vector>
   bool Ok(void)
   {  // type corresponding to elements of Vector
      typedef typename Vector::value_type Scalar;

      bool ok = true;             // initialize testing flag

      Vector x;                   // use the default constructor
      ok &= (x.size() == 0);      // test size for an empty vector
      Vector y(2);                // use the sizing constructor
      ok &= (y.size() == 2);      // size for an vector with elements

      // non-const access to the elements of y
      size_t i;
      for(i = 0; i < 2; i++)
         y[i] = Scalar(i);

      const Vector z(y);          // copy constructor
      x.resize(2);                // resize
      x = z;                      // vector assignment

      // use the const access to the elements of x
      // and test the values of elements of x, y, z
      for(i = 0; i < 2; i++)
      {  ok &= (x[i] == Scalar(i));
         ok &= (y[i] == Scalar(i));
         ok &= (z[i] == Scalar(i));
      }
      return ok;
   }
}
bool SimpleVector (void)
{  bool ok = true;

   // use routine above to check these cases
   ok &= Ok< std::vector<double> >();
   ok &= Ok< std::valarray<float> >();
   ok &= Ok< CppAD::vector<int> >();
# ifndef _MSC_VER
   // Avoid Microsoft following compiler warning:  'size_t' :
   // forcing value to bool 'true' or 'false' (performance warning)
   ok &= Ok< std::vector<bool> >();
   ok &= Ok< CppAD::vector<bool> >();
# endif
   // use CheckSimpleVector for more extensive testing
   CppAD::CheckSimpleVector<double, std::vector<double>  >();
   CppAD::CheckSimpleVector<float,  std::valarray<float> >();
   CppAD::CheckSimpleVector<int,    CppAD::vector<int>   >();
   CppAD::CheckSimpleVector<bool,   std::vector<bool>    >();
   CppAD::CheckSimpleVector<bool,   CppAD::vector<bool>  >();

   return ok;
}