/* $Id: bool_fun.cpp 2506 2012-10-24 19:36:49Z bradbell $ */
/* --------------------------------------------------------------------------
CppAD: C++ Algorithmic Differentiation: Copyright (C) 2003-12 Bradley M. Bell
CppAD is distributed under multiple licenses. This distribution is under
the terms of the
GNU General Public License Version 3.
A copy of this license is included in the COPYING file of this distribution.
Please visit http://www.coin-or.org/CppAD/ for information on other licenses.
-------------------------------------------------------------------------- */
/*
$begin bool_fun.cpp$$
$spell
bool
Geq
Cpp
$$
$section AD Boolean Functions: Example and Test$$
$index example, AD bool$$
$index test, AD bool$$
$code
$verbatim%example/bool_fun.cpp%0%// BEGIN C++%// END C++%1%$$
$$
$end
*/
// BEGIN C++
# 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;
}
// END C++