/usr/include/casacore/lattices/LEL/LELUnary.h is in casacore-dev 2.2.0-2.
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//# Copyright (C) 1997,1998,1999,2000
//# 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: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef LATTICES_LELUNARY_H
#define LATTICES_LELUNARY_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/lattices/LEL/LELInterface.h>
#include <casacore/lattices/LEL/LELScalar.h>
#include <casacore/lattices/LEL/LELUnaryEnums.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
// <summary> This LEL class handles scalar (unary) constants </summary>
//
// <use visibility=local>
//
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
//
// <prerequisite>
// <li> <linkto class="Lattice"> Lattice</linkto>
// <li> <linkto class="LatticeExpr"> LatticeExpr</linkto>
// <li> <linkto class="LatticeExprNode"> LatticeExprNode</linkto>
// <li> <linkto class="LELInterface"> LELInterface</linkto>
// <li> <linkto class="LELUnaryEnums"> LELUnaryEnums</linkto>
// </prerequisite>
//
// <etymology>
// This derived LEL letter class handles scalar (unary) constants
// </etymology>
//
// <synopsis>
// This LEL letter class is derived from LELInterface. It
// is used to construct LEL objects that represent scalars
// constants. They can be of type Float,Double,Complex,DComplex
// and Bool.
//
// A description of the implementation details of the LEL classes can
// be found in
// <a href="../notes/216.html">Note 216</a>
// </synopsis>
//
// <example>
// Examples are not very useful as the user would never use
// these classes directly. Look in LatticeExprNode.cc to see
// how it invokes these classes. Examples of how the user
// would indirectly use this class (through the envelope) are:
// <srcblock>
// IPosition shape(2,5,10);
// ArrayLattice<Float> x(shape); x.set(1.0);
// ArrayLattice<Float> y(shape);
// ArrayLattice<Float> z(shape);
// y.copyData(x+2.0); // y = x + 2.0
// z.copyData(True); // z = True
// </srcblock>
// </example>
//
// <motivation>
// Constants are a basic mathematical expression.
// </motivation>
//
// <todo asof="1998/01/20">
// </todo>
template <class T> class LELUnaryConst : public LELInterface<T>
{
//# Make members of parent class known.
protected:
using LELInterface<T>::setAttr;
public:
// Default constructor creates a scalar with a false mask.
LELUnaryConst();
// Constructor takes a scalar.
LELUnaryConst(const T val);
// Destructor does nothing
~LELUnaryConst();
// Evaluate the expression.
// This throws an exception, since only a scalar can be returned.
virtual void eval (LELArray<T>& result,
const Slicer& section) const;
// Evaluate the scalar expression (get the constant)
virtual LELScalar<T> getScalar() const;
// Do further preparations (e.g. optimization) on the expression.
virtual Bool prepareScalarExpr();
// Get class name
virtual String className() const;
private:
LELScalar<T> val_p;
};
// <summary> This LEL class handles numerical unary operators </summary>
//
// <use visibility=local>
//
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
//
// <prerequisite>
// <li> <linkto class="Lattice"> Lattice</linkto>
// <li> <linkto class="LatticeExpr"> LatticeExpr</linkto>
// <li> <linkto class="LatticeExprNode"> LatticeExprNode</linkto>
// <li> <linkto class="LELInterface"> LELInterface</linkto>
// <li> <linkto class="LELUnaryEnums"> LELUnaryEnums</linkto>
// </prerequisite>
//
// <etymology>
// This derived LEL letter class handles numerical unary
// operators
// </etymology>
//
// <synopsis>
// This LEL letter class is derived from LELInterface. It
// is used to construct LEL objects that apply numerical unary
// operators to Lattice expressions. They operate on numerical
// Lattice (Float,Double,Complex,DComplex) expressions and return the
// same numerical type. The available C++ operators
// are <src>+,-</src> with equivalents in the enum
// of PLUS and MINUS.
//
// A description of the implementation details of the LEL classes can
// be found in
// <a href="../notes/216.html">Note 216</a>
// </synopsis>
//
// <example>
// Examples are not very useful as the user would never use
// these classes directly. Look in LatticeExprNode.cc to see
// how it invokes these classes. An example of how the user
// would indirectly use this class (through the envelope) is:
// <srcblock>
// IPosition shape(2,5,10);
// ArrayLattice<Float> x(shape); x.set(1.0);
// ArrayLattice<Float> y(shape);
// y.copyData(-x); // y = -x
// </srcblock>
// </example>
//
// <motivation>
// Numerical unary operations are a basic mathematical expression.
// </motivation>
//
// <todo asof="1998/01/20">
// </todo>
template <class T> class LELUnary : public LELInterface<T>
{
public:
// Constructor takes operation and expression
// to be operated upon
LELUnary(const LELUnaryEnums::Operation op,
const CountedPtr<LELInterface<T> >& pExpr);
// Destructor does nothing
~LELUnary();
// Recursively evaluate the expression.
virtual void eval (LELArray<T>& result,
const Slicer& section) const;
// Recursively evaluate the scalar expression.
virtual LELScalar<T> getScalar() const;
// Do further preparations (e.g. optimization) on the expression.
virtual Bool prepareScalarExpr();
// Get class name
virtual String className() const;
// Handle locking/syncing of a lattice in a lattice expression.
// <group>
virtual Bool lock (FileLocker::LockType, uInt nattempts);
virtual void unlock();
virtual Bool hasLock (FileLocker::LockType) const;
virtual void resync();
// </group>
private:
LELUnaryEnums::Operation op_p;
CountedPtr<LELInterface<T> > pExpr_p;
};
// <summary> This LEL class handles logical unary operators </summary>
//
// <use visibility=local>
//
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
//
// <prerequisite>
// <li> <linkto class="Lattice"> Lattice</linkto>
// <li> <linkto class="LatticeExpr"> LatticeExpr</linkto>
// <li> <linkto class="LatticeExprNode"> LatticeExprNode</linkto>
// <li> <linkto class="LELInterface"> LELInterface</linkto>
// <li> <linkto class="LELUnaryEnums"> LELUnaryEnums</linkto>
// </prerequisite>
//
// <etymology>
// This derived LEL letter class handles logical unary
// operators
// </etymology>
//
// <synopsis>
// This LEL letter class is derived from LELInterface. It
// is used to construct LEL objects that apply logical unary
// operators to Lattice expressions. They operate on Bool
// Lattice expressions only and return a Bool.
// The available C++ operator is <src>!</src> with the equivalent
// in the enum of NOT.
//
// A description of the implementation details of the LEL classes can
// be found in
// <a href="../notes/216.html">Note 216</a>
// </synopsis>
//
// <example>
// Examples are not very useful as the user would never use
// these classes directly. Look in LatticeExprNode.cc to see
// how it invokes these classes. An example of how the user
// would indirectly use this class (through the envelope) is:
// <srcblock>
// IPosition shape(2,5,10);
// ArrayLattice<Bool> x(shape); x.set(True);
// ArrayLattice<Bool> y(shape);
// y.copyData(!x); // y = !x
// </srcblock>
// </example>
//
// <motivation>
// Logical unary operations are a basic mathematical expression.
// </motivation>
//
// <todo asof="1998/01/20">
// </todo>
class LELUnaryBool : public LELInterface<Bool>
{
public:
// Constructor takes operation and expression
// to be operated upon
LELUnaryBool(const LELUnaryEnums::Operation op,
const CountedPtr<LELInterface<Bool> >& pExpr);
// Destructor does nothing
~LELUnaryBool();
// Recursively evaluate the expression.
virtual void eval (LELArray<Bool>& result,
const Slicer& section) const;
// Recursively evaluate the scalar expression.
virtual LELScalar<Bool> getScalar() const;
// Do further preparations (e.g. optimization) on the expression.
virtual Bool prepareScalarExpr();
// Get class name
virtual String className() const;
// Handle locking/syncing of a lattice in a lattice expression.
// <group>
virtual Bool lock (FileLocker::LockType, uInt nattempts);
virtual void unlock();
virtual Bool hasLock (FileLocker::LockType) const;
virtual void resync();
// </group>
private:
LELUnaryEnums::Operation op_p;
CountedPtr<LELInterface<Bool> > pExpr_p;
};
} //# NAMESPACE CASACORE - END
//# See comments in LELInterface why LELInterface.tcc is included here.
#ifndef CASACORE_NO_AUTO_TEMPLATES
#include <casacore/lattices/LEL/LELInterface.tcc>
#include <casacore/lattices/LEL/LELUnary.tcc>
#endif //# CASACORE_NO_AUTO_TEMPLATES
#endif
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