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secondo/Algebras/Raster2/isstring.h
2026-01-23 17:03:45 +08:00

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/*
This file is part of SECONDO.
Copyright (C) 2011, University in Hagen, Department of Computer Science,
Database Systems for New Applications.
SECONDO 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 2 of the License, or
(at your option) any later version.
SECONDO 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 SECONDO; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef RASTER2_ISSTRING_H
#define RASTER2_ISSTRING_H
#include "istype.h"
#include "sstring.h"
namespace raster2
{
typedef istype<std::string> isstring;
template <>
struct istype_helper<std::string>
{
typedef isstring implementation_type;
typedef sstring spatial_type;
typedef CcString wrapper_type;
static std::string name();
static bool check(const NList& nl)
{
return nl.isString();
}
static std::string parse(const NList& nl)
{
return nl.str();
}
static bool isUndefined(const std::string& rString)
{
return rString == UNDEFINED_STRING();
}
static std::string getUndefined()
{
return UNDEFINED_STRING();
}
static std::string BasicType()
{
return CcString::BasicType();
}
static ListExpr listExpr(const std::string& rString)
{
return NList(rString).listExpr();
}
};
}
#endif // RASTER2_ISSTRING_H