MSObservationGram.h

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// # MSObservationGram.h: Grammar for ms scan sub-expressions
// # Copyright (C) 1998
// # 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 MS_MSOBSERVATIONGRAM_H
#define MS_MSOBSERVATIONGRAM_H
 
// # Includes
#include <casacore/casa/aips.h>
#include <casacore/ms/MSSel/MSObservationParse.h>
#include <casacore/casa/BasicSL/String.h>
 
namespace casacore {  // # NAMESPACE CASACORE - BEGIN
 
// # Forward Declarations
class MeasurementSet;
class TableExprNode;
 
// <summary>
// Global functions for flex/bison scanner/parser for MSObservationGram
// </summary>
 
// <use visibility=local>
 
// <reviewed reviewer="" date="" tests="">
// </reviewed>
 
// <prerequisite>
// # Classes you should understand before using this one.
//  <li> MSObservationGram.l and .y  (flex and bison grammar)
// </prerequisite>
 
// <synopsis>
// Global functions are needed to define the input of the flex scanner
// and to start the bison parser.
// The input is taken from a string.
// </synopsis>
 
// <motivation>
// It is necessary to be able to give an image expression in ASCII.
// This can be used in glish.
// </motivation>
// <todo asof="$DATE:$">
// # A List of bugs, limitations, extensions or planned refinements.
// </todo>
 
// <group name=MSObservationGramFunctions>
 
// Declare the bison parser (is implemented by bison command).
TableExprNode msObservationGramParseCommand(const MeasurementSet* ms,
                                            const MSObservation& obsSubTable,
                                            const TableExprNode& colAsTEN, const String& command,
                                            Vector<Int>& idList);
 
TableExprNode baseMSObservationGramParseCommand(MSObservationParse* parser,
                                                const TableExprNode& colAsTEN,
                                                const String& command, Vector<Int>& selectedIDs);
// The yyerror function for the parser.
// It throws an exception with the current token.
void MSObservationGramerror(const char*);
 
// Give the table expression node.
// const TableExprNode *msObservationGramParseNode();
void msObservationGramParseDeleteNode();
 
// Give the current position in the string.
// This can be used when parse errors occur.
Int& msObservationGramPosition();
 
// Declare the input routine for flex/bison.
int msObservationGramInput(char* buf, int max_size);
 
// A function to remove escaped characters.
// String msObservationGramRemoveEscapes (const String& in);
 
// A function to remove quotes from a quoted string.
// String msObservationGramRemoveQuotes (const String& in);
 
// </group>
 
}  // namespace casacore
 
#endif