Prev Next BoolFun.cpp Headings

AD Boolean Functions: Example and Test
 

# include <cppad/cppad.hpp>
# include <complex>


// define abbreviation for double precision complex 
typedef std::complex<double> Complex;

namespace {
	// a unary bool function with Complex argument
	static bool IsReal(const Complex &x)
	{	return x.imag() == 0.; }

	// a binary bool function with Complex arguments
	static bool AbsGeq(const Complex &x, const Complex &y)
	{	double axsq = x.real() * x.real() + x.imag() * x.imag();
		double aysq = y.real() * y.real() + y.imag() * y.imag();

		return axsq >= aysq;
	}

	// Create version of IsReal with AD<Complex> argument
	// inside of namespace and outside of any other function.
	CPPAD_BOOL_UNARY(Complex, IsReal)

	// Create version of AbsGeq with AD<Complex> arguments
	// inside of namespace and outside of any other function.
	CPPAD_BOOL_BINARY(Complex, AbsGeq)

}
bool BoolFun(void)
{	bool ok = true;

	CppAD::AD<Complex> x = Complex(1.,  0.);
	CppAD::AD<Complex> y = Complex(1.,  1.);

	ok &= IsReal(x);
	ok &= ! AbsGeq(x, y);

	return ok;
}


Input File: example/bool_fun.cpp