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// $Id: NullablePredictionValue.hh 2641 2007-09-02 21:31:02Z flaterco $
// NullablePredictionValue: strict nullable PredictionValue.
/*
Copyright (C) 2006 David Flater.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// If not null, an implicit conversion to PredictionValue is available.
class NullablePredictionValue: public Nullable {
public:
NullablePredictionValue (); // Makes a null.
NullablePredictionValue (PredictionValue pv); // Not null.
NullablePredictionValue (Units::PredictionUnits units, // Not null.
double value);
const double val() const; // Error if null.
void Units (Units::PredictionUnits units); // Error if null.
const Units::PredictionUnits Units () const; // Error if null.
// Let int types be implicitly converted to double.
void operator*= (double multiplier); // Error if null.
void operator/= (double divisor); // Error if null.
// Like += except that conversions are silently performed.
// Use only when you really mean it.
void convertAndAdd (PredictionValue addend); // Error if null.
// Print in the form -XX.YY units (padding as needed). Error if null.
void print (Dstr &text_out) const;
// Same thing without padding, with abbreviated units. Error if null.
void printnp (Dstr &text_out) const;
protected:
PredictionValue _pv;
};
// Cleanup2006 Done
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