/// <summary>
/// Creates a new symbol or gives a reference to a symbol that is
/// determined by the type of the symbol record in the file content.
/// </summary>
/// <param name="symbolRecord"></param>
/// <returns></returns>
static public Symbol CreateSymbol(SymbolRecord symbolRecord)
{
Symbol symbol;
switch (symbolRecord.Kind)
{
case 0:
symbol = new SymbolNonterminal(symbolRecord.Index, symbolRecord.Name);
break;
case 1:
symbol = new SymbolTerminal(symbolRecord.Index, symbolRecord.Name);
break;
case 2:
symbol = new SymbolWhiteSpace(symbolRecord.Index);
break;
case 3:
symbol = SymbolCollection.EOF;
break;
case 4:
symbol = new SymbolCommentStart(symbolRecord.Index);
break;
case 5:
symbol = new SymbolCommentEnd(symbolRecord.Index);
break;
case 6:
symbol = new SymbolCommentLine(symbolRecord.Index);
break;
case 7:
symbol = SymbolCollection.ERROR;
break;
default:
// this sort of symbol should never be here
symbol = new SymbolError(-1);
break;
}
return(symbol);
}
/// <summary>
/// Creates a new terminal token object.
/// </summary>
/// <param name="symbol">The symbol that this token represents.</param>
/// <param name="text">The text from the input that is the token.</param>
/// <param name="location">The location in the input that this token
/// has been found.</param>
public TerminalToken(SymbolTerminal symbol, string text, Location location)
{
this.symbol = symbol;
this.text = text;
this.location = location;
}