Symbol Table

Specifications

SymbolTable.cpp:Build the SymbolTable
SymbolTable.h

Symbol.cpp:Operating of Symbol  	
Symbol.h 

1.Use SymbolTable::createTable create a SymbolTable
2.Use SymbolTable::insert add the value in SymbolTable
3.Output SymbolTable use SymbolTable::printTable

Source Listing

Some example of SymbolTable code

SymbolTable* SymbolTable::createTable(Lexeme lexeme, LexemeResources::DataType type)
{
	int childLevel = _level + 1;
	SymbolTable* childTable = new SymbolTable(lexeme, type, childLevel, this);
	
	return childTable;
}

SymbolTable* SymbolTable::closeTable(int label)
{
	///size the size of the symbol table so this 
	//symbol will have the correct size
	//when it is refered to

	unordered_map::const_iterator symbolIt = _symbolLookup.begin();
	while (symbolIt != _symbolLookup.end()){
		_size += symbolIt->second.size();
		symbolIt++;
	}

	//clear the current entries in the table
	_symbolLookup.clear();

	if (_parentTable){
		Symbol newSymbol(_lexeme, _dataType, _level, 0, _size);
		newSymbol.setLabel(label);
		newSymbol.setArgumentTypes(this->argumentTypes());
		newSymbol.setFunProd(true);
		//add itself to the parent table
		_parentTable->insert(newSymbol);
	}


	return _parentTable;
}


void SymbolTable::insert(const Lexeme lex,const DataType type)
{
	int size = 1;
	Symbol newSymbol(lex, type, _level, _currentOffset, size);
	_currentOffset += size;
	_size += size;

	_symbolLookup[lex.getValue()] =  newSymbol;
}

void SymbolTable::printTable()
{
	//if (_symbolLookup.empty())
		//return;
	std::cout
		<< "\nCurrent Table Name: " << lexeme().getValue()
		<< "\nCurrent Table Level: " << level()
		<< "\nCurrent Table Size : " << size();
		//<< "\nCurrent Table Offset: " << offset()
		//<< "\n";

	std::cout << "\nSymbol Name:\tDataType: \tOffset: \tSize: \n";

	for (auto& x : _symbolLookup)
		std::cout << x.first << "\t\t" << x.second.dataType() << "\t\t" << x.second.offset() << "\t\t" << x.second.size() << std::endl;
}