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Using a User Defined AD Base Type: Example and Test
`

    // suppress conversion warnings before other includes
    # include <cppad/wno_conversion.hpp>
    //
    # include "base_alloc.hpp"
    # include <cppad/cppad.hpp>

    bool base_require(void)
    {     bool ok = true;
         using CppAD::thread_alloc;
         typedef CppAD::AD<base_alloc> ad_base_alloc;

         // check the amount of memory inuse by this thread (thread zero)
         size_t thread = thread_alloc::thread_num();
         ok &= thread == 0;

         // y = x^2
         size_t n = 1, m = 1;
         CPPAD_TESTVECTOR(ad_base_alloc) a_x(n), a_y(m);
         a_x[0] = ad_base_alloc(1.);
         CppAD::Independent(a_x);
         a_y[0] = a_x[0] * a_x[0];
         CppAD::ADFun<base_alloc> f(a_x, a_y);

         // check function value f(x) = x^2
         CPPAD_TESTVECTOR(base_alloc) x(n), y(m);
         base_alloc eps =
              base_alloc(100.) * CppAD::numeric_limits<base_alloc>::epsilon();
         x[0] = base_alloc(3.);
         y    = f.Forward(0, x);
         ok  &= CppAD::NearEqual(y[0], x[0] * x[0], eps, eps);

         // check derivative value f'(x) = 2 * x
         CPPAD_TESTVECTOR(base_alloc) dy(m * n);
         dy   = f.Jacobian(x);
         ok  &= CppAD::NearEqual(dy[0], base_alloc(2.) * x[0], eps, eps);

         return ok;
    }

` Purpose
The type `base_alloc`, defined in base_alloc.hpp , meets the requirements specified by base_require for `Base` in `AD<Base>` . The program below is an example use of `AD<base_alloc>` .

Input File: example/general/base_require.cpp