ArrayMathBase.h

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00001 //# ArrayMathBase.h: Basic functions and classes for math on Array objects
00002 //# Copyright (C) 2012
00003 //# Associated Universities, Inc. Washington DC, USA.
00004 //#
00005 //# This library is free software; you can redistribute it and/or modify it
00006 //# under the terms of the GNU Library General Public License as published by
00007 //# the Free Software Foundation; either version 2 of the License, or (at your
00008 //# option) any later version.
00009 //#
00010 //# This library is distributed in the hope that it will be useful, but WITHOUT
00011 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012 //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00013 //# License for more details.
00014 //#
00015 //# You should have received a copy of the GNU Library General Public License
00016 //# along with this library; if not, write to the Free Software Foundation,
00017 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
00018 //#
00019 //# Correspondence concerning AIPS++ should be addressed as follows:
00020 //#        Internet email: aips2-request@nrao.edu.
00021 //#        Postal address: AIPS++ Project Office
00022 //#                        National Radio Astronomy Observatory
00023 //#                        520 Edgemont Road
00024 //#                        Charlottesville, VA 22903-2475 USA
00025 //#
00026 //# $Id: ArrayMathBase.h 21262 2012-09-07 12:38:36Z gervandiepen $
00027 
00028 #ifndef CASA_ARRAYMATHBASE_H
00029 #define CASA_ARRAYMATHBASE_H
00030 
00031 #include <casacore/casa/aips.h>
00032 
00033 namespace casacore {
00034 
00035   //# Forward declarations.
00036   template<typename T> class Array;
00037 
00038 
00039   // <summary>
00040   // Basic class for math on Array objects
00041   // </summary>
00042   //
00043   // <reviewed reviewer="UNKNOWN" date="" tests="tArrayMath">
00044   //
00045   // <prerequisite>
00046   //   <li> <linkto class=Array>Array</linkto>
00047   // </prerequisite>
00048   //
00049   // <synopsis>
00050   // The abstract base class ArrayFunctorBase is defined for functors to
00051   // be used in functions like slidingXXX.
00052   // Virtual functions instead of templated functions are used to avoid
00053   // code bloat when used in functions like partialArrayMath. Because a
00054   // reduction operation usually takes much more time than the call, using
00055   // virtual functions hardly imposes a performance penalty.
00056   // </synopsis>
00057   template<typename T, typename RES=T> class ArrayFunctorBase {
00058   public:
00059     virtual ~ArrayFunctorBase() {}
00060     virtual RES operator() (const Array<T>&) const = 0;
00061   };
00062 
00063   // </group>
00064 
00065 } //# end namespace
00066 
00067 #endif
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