UnaryFilterExpression.h

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#ifndef __UnaryFilterExpressions_h__
#define __UnaryFilterExpressions_h__

#include "mw/attributes/filter/logical_not.h"

namespace famouso {
    namespace mw {
        namespace attributes {
            namespace filter {


                template < class E, typename A=void>
                struct UnaryFilterExpression {
                    typedef UnaryFilterExpression type;
                    E expr_;

                    UnaryFilterExpression (const E& e) : expr_ (e) {}
                    explicit UnaryFilterExpression () {}

                    template< typename T>
                    bool operator() (const T& d) const {
                        return expr_(d);
                    }

                };

                template < class E>
                struct UnaryFilterExpression<E, filter::logical_not<E> > {
                    typedef UnaryFilterExpression type;
                    E expr_;

                    UnaryFilterExpression (const E& e) : expr_ (e) {}
                    explicit UnaryFilterExpression () {}

                    template< typename T>
                    bool operator() (const T& d) const {
                        return filter::logical_not<E>::apply(expr_, d);
                    }

                };

            } /* filter */
        } /* attributes */
    } /* mw */
} /* famouso */

#endif