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#ifndef _SYMTAB_HH_
#define _SYMTAB_HH_
/*
* This file is part of rasdaman community.
*
* Rasdaman community 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 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community 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 rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
/*************************************************************************
*
*
* PURPOSE:
* store symbols (identifiers) during the parse process
*
*
* COMMENTS:
* none
*
***********************************************************************/
#include <iostream>
#include <vector>
#include <map>
#include <string>
#include "raslib/rmdebug.hh"
//@ManMemo: Module: {\bf qlparser}
/*@Doc:
This class represents a generic symbol table. The operations on
symbols in the symbol table are: putSymbol, getSymbol, lookupSymbol.
The operations on scopes are: initScope, exitScope, outScope, clearScope,
wipe.
*/
template <class T>
class SymbolTable {
public:
/// This vector stores keys available in the map.
std::vector<std::string > keys;
/// This is an iterator for the vector storing the keys available in the map.
std::vector<std::string >::iterator keyIterator;
/// default constructor creates an empty symbol table, calls initScope(), clears local symbols.
SymbolTable();
/// default destructor, calls exitScope().
~SymbolTable();
//@Man: Methods for symbol manipulation
//@{
/// Puts value at position symbol in the table. Returns true if it succeeded, otherwise false.
bool putSymbol( const std::string& symbol, T value );
/// Get value at position symbol from the table. If symbol doesn't exist, it returns NULL.
T getSymbol( const std::string& symbol );
/// Returns true if symbol is in table.
bool lookupSymbol( const std::string& symbol );
//@}
//@Man: Methods for scope manipulation
//@{
/// Enter new scope.
void initScope();
/// Exit current scope.
void exitScope();
/// Output current scope to RMInit::logOut.
void outScope();
/// Init scope by clearing inner symbols.
void clearScope();
/// Clear all symbols in all scopes.
void wipe();
//@}
private:
/// Store symbol in map.
void storeSymbol( const std::string& symbol, T value ); // put only in the hash_map
/// Stores local variables.
std::map<std::string , T> STVars;
/// Stores scopes.
std::vector<std::map<std::string , T> > STScopes;
};
#ifdef EARLY_TEMPLATE
#ifdef __EXECUTABLE__
#include "symtab.cc"
#endif
#endif
#endif
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