00001 //# MSCorrParse.h: Classes to hold results from corr grammar parser 00002 //# Copyright (C) 1994,1995,1997,1998,1999,2000,2001,2003 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 MS_MSUVDISTPARSE_H 00029 #define MS_MSUVDISTPARSE_H 00030 00031 //# Includes 00032 #include <casacore/casa/aips.h> 00033 #include <casacore/ms/MSSel/MSParse.h> 00034 00035 namespace casacore { //# NAMESPACE CASACORE - BEGIN 00036 00037 //# Forward Declarations 00038 00039 // <summary> 00040 // Class to hold values from UV dist grammar parser 00041 // </summary> 00042 00043 // <use visibility=local> 00044 00045 // <reviewed reviewer="" date="" tests=""> 00046 // </reviewed> 00047 00048 // <prerequisite> 00049 //# Classes you should understand before using this one. 00050 // </prerequisite> 00051 00052 // <etymology> 00053 // MSCorrParse is the class used to parse a corr command. 00054 // </etymology> 00055 00056 // <synopsis> 00057 // MSCorrParse is used by the parser of UV dist sub-expression statements. 00058 // The parser is written in Bison and Flex in files MSCorrGram.y and .l. 00059 // The statements in there use the routines in this file to act 00060 // upon a reduced rule. 00061 // Since multiple tables can be given (with a shorthand), the table 00062 // names are stored in a list. The variable names can be qualified 00063 // by the table name and will be looked up in the appropriate table. 00064 // 00065 // The class MSCorrParse only contains information about a table 00066 // used in the table command. Global variables (like a list and a vector) 00067 // are used in MSCorrParse.cc to hold further information. 00068 // 00069 // Global functions are used to operate on the information. 00070 // The main function is the global function msCorrCommand. 00071 // It executes the given STaQL command and returns the resulting ms. 00072 // This is, in fact, the only function to be used by a user. 00073 // </synopsis> 00074 00075 // <motivation> 00076 // It is necessary to be able to give a ms command in ASCII. 00077 // This can be used in a CLI or in the table browser to get a subset 00078 // of a table or to sort a table. 00079 // </motivation> 00080 00081 //# <todo asof="$DATE:$"> 00082 //# A List of bugs, limitations, extensions or planned refinements. 00083 //# </todo> 00084 00085 00086 class MSCorrParse : public MSParse 00087 { 00088 00089 public: 00090 // Default constructor 00091 MSCorrParse (); 00092 00093 // Associate the ms and the shorthand. 00094 MSCorrParse (const MeasurementSet* ms); 00095 00096 // ~MSCorrParse() {if (node_p) delete node_p;node_p=0x0;} 00097 // MS selection 00098 const TableExprNode * selectCorrType(const String& corrType); 00099 00100 // Get table expression node object. 00101 static const TableExprNode* node(); 00102 static void cleanup() {if (node_p) delete node_p;node_p=0x0;} 00103 00104 private: 00105 static TableExprNode *node_p; 00106 }; 00107 00108 } //# NAMESPACE CASACORE - END 00109 00110 #endif