QLogical.h

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// # QLogical.h: class to manipulate physical, dimensioned quantities
// # Copyright (C) 1994,1995,1996,1998,1999,2000
// # Associated Universities, Inc. Washington DC, USA.
// #
// # This library is free software; you can redistribute it and/or modify it
// # under the terms of the GNU Library General Public License as published by
// # the Free Software Foundation; either version 2 of the License, or (at your
// # option) any later version.
// #
// # This library 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 Library General Public
// # License for more details.
// #
// # You should have received a copy of the GNU Library General Public License
// # along with this library; if not, write to the Free Software Foundation,
// # Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
// #
// # Correspondence concerning AIPS++ should be addressed as follows:
// #        Internet email: casa-feedback@nrao.edu.
// #        Postal address: AIPS++ Project Office
// #                        National Radio Astronomy Observatory
// #                        520 Edgemont Road
// #                        Charlottesville, VA 22903-2475 USA
 
#ifndef CASA_QLOGICAL_H
#define CASA_QLOGICAL_H
 
// # Includes
#include <casacore/casa/aips.h>
#include <casacore/casa/Quanta/Quantum.h>
#include <casacore/casa/Arrays/ArrayFwd.h>
 
namespace casacore {  // # NAMESPACE CASACORE - BEGIN
 
// # Forward Declarations
 
// # Typedefs
 
// <summary>
//   Logical operations for the Quantum class.
// </summary>
 
// <use visibility=export>
 
// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="tQuantum">
//
// <prerequisite>
//   <li> <linkto class=Unit>Unit</linkto>
//   <li> <linkto class=Quantum>Quantum</linkto>
// </prerequisite>
//
// <etymology>
// QLogical derived from Quantum logical functions
// </etymology>
//
// <synopsis>
// Quantities are values with a unit. Their basic specification can be one of
// two forms:
// <srcblock>
// Quantity( Double value, String unit);    // or: Unit unit
// Quantum<Type> ( Type value, String unit) // or: Unit unit
// </srcblock>
//
// A unit is a string of known unit fields separated
// by 'space' or '.' (to indicate multiply) or '/' (to indicate divide).
// See the <linkto class=Unit>Unit</linkto> class for details.
// Example: km/s/(Mpc.s)2  is identical to km.s-1.Mpc-2.s-2
//
// This file defines the logical operations that can be done on
// <linkto class=Quantum><src>Quantum<T></src></linkto>.
//
// They can be subdivided into various groupings:
// <ul>
//   <li> <linkto file="QLogical.h#equality">Straight comparisons:
//          unequal if non-conforming units or different values</linkto>
//   <li> <linkto file="QLogical.h#compare">Comparisons</linkto>
//   <li> <linkto file="QLogical.h#foreign">Special make Bool routines
//                to cater for array comparisons</linkto>
// </ul>
//
// The operations defined are:
// <ul>
//   <li> Quantum<T> == Quantum<T> or ==T
//   <li> Quantum<T> != Quantum<T> or !=T
//   <li> > < >= <= of Quantum<T> or T and Quantum<T>
//   <li> near, nearAbs(Quantum<T> or T, Quantum<T> or T [, tolerance])
// </ul>
// </synopsis>
//
// <motivation>
// To separate the logical operations from Quantum
// </motivation>
//
// <todo asof="941201">
//   <li> Some inlining (did not work first go)
//   <li> Recode with allEQ etc if part of library for all data types,
//      and get rid of the special QMakeBool(), and the
//      include LogiArrayFwd.h
// </todo>
//
// <linkfrom anchor="Quantum logical operations" classes="Quantum">
//   <here>Quantum logical operations</here> -- Logical operations
//   for the Quantum class.
// </linkfrom>
 
// <group name="Quantum logical operations">
 
//
// Straight comparisons: unequal if non-conforming units or different values
// if units made equal. I.e. <src> 1in != 1m </src>,
// <src> 1in != 1s </src>, <src> 36in == 1yd </src>./
// <group name="equality">
template <class Qtype>
Bool operator==(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator==(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool operator==(const Qtype &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator!=(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator!=(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool operator!=(const Qtype &left, const Quantum<Qtype> &other);
// </group>
 
// Near-ness tests: unequal if non-conforming units. In other cases the
// tolerance is in the units of the first argument, with the second argument
// converted, if necessary, to the same units as the first.
// Note (SUN?) compiler does not accept default arguments in template functions
// <group name="near">
template <class Qtype>
Bool near(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool near(const Quantum<Qtype> &left, const Quantum<Qtype> &other, Double tol);
template <class Qtype>
Bool near(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool near(const Quantum<Qtype> &left, const Qtype &other, Double tol);
template <class Qtype>
Bool near(const Qtype &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool near(const Qtype &left, const Quantum<Qtype> &other, Double tol);
template <class Qtype>
Bool nearAbs(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool nearAbs(const Quantum<Qtype> &left, const Quantum<Qtype> &other, Double tol);
template <class Qtype>
Bool nearAbs(const Quantum<Qtype> &left, const Quantum<Qtype> &other, const Quantum<Qtype> &tol);
template <class Qtype>
Bool nearAbs(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool nearAbs(const Quantum<Qtype> &left, const Qtype &other, Double tol);
template <class Qtype>
Bool nearAbs(const Qtype &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool nearAbs(const Qtype &left, const Quantum<Qtype> &other, Double tol);
// </group>
//
// Comparisons. The comparisons are done on values at equal units with
// transparent conversion if necessary.
// <thrown>
//   <li> AipsError if non-conforming units
// </thrown>
// <group name="compare">
template <class Qtype>
Bool operator<(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator<(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool operator<(const Qtype &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator>(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator>(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool operator>(const Qtype &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator<=(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator<=(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool operator<=(const Qtype &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator>=(const Quantum<Qtype> &left, const Quantum<Qtype> &other);
template <class Qtype>
Bool operator>=(const Quantum<Qtype> &left, const Qtype &other);
template <class Qtype>
Bool operator>=(const Qtype &left, const Quantum<Qtype> &other);
// </group>
//
// Special make Bool routines to cater for array comparisons
// <group name="foreign">
Bool QMakeBool(Int val);
Bool QMakeBool(const LogicalArray &val);
// </group>
 
// # Inline Implementations
 
// </group>
 
}  // namespace casacore
 
#ifndef CASACORE_NO_AUTO_TEMPLATES
#include <casacore/casa/Quanta/QLogical.tcc>
#endif  // # CASACORE_NO_AUTO_TEMPLATES
#endif