ConvertScalar.h

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00001 //# ConvertScalar.h: Templated functions to convert scalars
00002 //# Copyright (C) 2000,2002
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 //# $Id$
00027 
00028 #ifndef CASA_CONVERTSCALAR_H
00029 #define CASA_CONVERTSCALAR_H
00030 
00031 //# Includes
00032 #include <casacore/casa/aips.h>
00033 #include <casacore/casa/BasicSL/Complex.h>
00034 
00035 namespace casacore { //# NAMESPACE CASACORE - BEGIN
00036 
00037 // <summary>
00038 // Templated functions to convert scalars from one type to another.
00039 // </summary>
00040 // <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="" demos="">
00041 // </reviewed>
00042 
00043 // <synopsis> 
00044 // Templated functions to convert scalars from one type to another.
00045 // They are useful to be able to convert a DComplex to a Complex
00046 // in templated classes.
00047 // A Complex,DComplex specialisation is necessary because the complex
00048 // class in the standard C++ library does not have such an automatic
00049 // conversion.
00050 // </synopsis>
00051 
00052 // <group name="Scalar conversion">
00053 template<class T, class F> inline void convertScalar (T& out, F in)
00054   { out = static_cast<T>(in); }
00055 inline void convertScalar (Complex& out, DComplex in)
00056   { out = Complex(in.real(), in.imag()); }
00057 // </group>
00058 
00059 
00060 } //# NAMESPACE CASACORE - END
00061 
00062 #endif