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# ifndef CPPAD_CHECK_NUMERIC_TYPE_INCLUDED
# define CPPAD_CHECK_NUMERIC_TYPE_INCLUDED

/* --------------------------------------------------------------------------
CppAD: C++ Algorithmic Differentiation: Copyright (C) 2003-06 Bradley M. Bell

CppAD is distributed under multiple licenses. This distribution is under
the terms of the 
                    Common Public License Version 1.0.

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 CheckNumericType$$
$spell
        cppad.hpp
        CppAD
$$

$section Check NumericType Class Concept$$

$index numeric, check$$
$index check, numeric$$
$index concept, check numeric$$

$head Syntax$$
$code # include <cppad/check_numeric_type.hpp>$$
$pre
$$
$syntax%CheckNumericType<%NumericType%>()%$$


$head Purpose$$
The syntax 
$syntax%
        CheckNumericType<%NumericType%>()
%$$
preforms compile and run time checks that the type specified
by $italic NumericType$$ satisfies all the requirements for 
a $xref/NumericType/$$ class. 
If a requirement is not satisfied,
a an error message makes it clear what condition is not satisfied.

$head Include$$
The file $code cppad/check_numeric_type.hpp$$ is included by $code cppad/cppad.hpp$$
but it can also be included separately with out the rest
if the CppAD include files.

$head Example$$
$children%
        example/check_numeric_type.cpp
%$$
The file $xref/CheckNumericType.cpp/$$
contains an example and test of this function. 
It returns true, if it succeeds an false otherwise.
The comments in this example suggest a way to change the example
so an error message occurs.

$end
---------------------------------------------------------------------------
*/



namespace CppAD {

# ifdef NDEBUG
        template <class NumericType>
        inline void CheckNumericType(void)
        { }
# else
        template <class NumericType>
        NumericType CheckNumericType(void)
        {       // only need execute once per value NumericType type
                static bool runOnce = false;
                if( runOnce )
                        return NumericType(0);
                runOnce = true;

                /*
                contructors
                */
                NumericType check_NumericType_default_constructor;
                NumericType check_NumericType_constructor_from_int(1);

                const NumericType x(1);

                NumericType check_NumericType_copy_constructor(x);

                // assignment
                NumericType check_NumericType_assignment;
                check_NumericType_assignment = x;

                /*
                unary operators
                */
                const NumericType check_NumericType_unary_plus(1);
                NumericType check_NumericType_unary_plus_result = 
                        + check_NumericType_unary_plus;

                const NumericType check_NumericType_unary_minus(1);
                NumericType check_NumericType_unary_minus_result = 
                        - check_NumericType_unary_minus;

                /*
                binary operators
                */
                const NumericType check_NumericType_binary_addition(1);
                NumericType check_NumericType_binary_addition_result = 
                        check_NumericType_binary_addition + x;

                const NumericType check_NumericType_binary_subtraction(1);
                NumericType check_NumericType_binary_subtraction_result =
                        check_NumericType_binary_subtraction - x;

                const NumericType check_NumericType_binary_multiplication(1);
                NumericType check_NumericType_binary_multiplication_result =
                        check_NumericType_binary_multiplication * x;

                const NumericType check_NumericType_binary_division(1);
                NumericType check_NumericType_binary_division_result =
                        check_NumericType_binary_division / x;

                /*
                computed assignment operators
                */
                NumericType 
                check_NumericType_computed_assignment_addition(1);
                check_NumericType_computed_assignment_addition += x;

                NumericType 
                check_NumericType_computed_assignment_subtraction(1);
                check_NumericType_computed_assignment_subtraction -= x;

                NumericType 
                check_NumericType_computed_assignment_multiplication(1);
                check_NumericType_computed_assignment_multiplication *= x;

                NumericType 
                check_NumericType_computed_assignment_division(1);
                check_NumericType_computed_assignment_division /= x;

                /* 
                use all values so as to avoid warnings
                */
                check_NumericType_default_constructor = x;
                return
                        + check_NumericType_default_constructor
                        + check_NumericType_constructor_from_int
                        + check_NumericType_copy_constructor
                        + check_NumericType_assignment
                        + check_NumericType_unary_plus_result
                        + check_NumericType_unary_minus_result
                        + check_NumericType_binary_addition_result
                        + check_NumericType_binary_subtraction_result
                        + check_NumericType_binary_multiplication_result
                        + check_NumericType_binary_division_result
                        + check_NumericType_computed_assignment_addition
                        + check_NumericType_computed_assignment_subtraction
                        + check_NumericType_computed_assignment_multiplication
                        + check_NumericType_computed_assignment_division
                ;
        }
# endif

} // end namespace CppAD

# endif

---