protected Token(Symbol Parent, Position? position, bool isTerminal)
{
if ((Parent.Type != SymbolType.Nonterminal) ^ isTerminal)
{
throw new ParserException("Unexpected SymbolType");
}
m_Parent = Parent;
m_Position = position;
}
internal Production(Symbol Head, short TableIndex, SymbolList Handle)
{
m_Head = Head;
m_Handle = Handle;
m_TableIndex = TableIndex;
}
internal void TrimReduction(Symbol newSymbol)
{
m_Parent = newSymbol;
}
Terminal CreateTerminal(Symbol symbol, int Count)
{
//Return Count characters from the lookahead buffer. DO NOT CONSUME
//This is used to create the text stored in a token. It is disgarded
//separately. Because of the design of the DFA algorithm, count should
//never exceed the buffer length. The If-Statement below is fault-tolerate
//programming, but not necessary.
if (Count > m_buffer.Length)
{
Count = m_buffer.Length;
}
string text = m_buffer.ToString(0, Count);
return new Terminal(symbol, text, m_SysPosition);
}
/// <summary>
/// Applications can use this method to create a 'virtual' terminal,
/// which they can then push into the parser.
/// </summary>
public static Terminal CreateVirtual(Symbol Parent, string Text)
{
return new Terminal(Parent, Text);
}
private Terminal(Symbol Parent, string Text)
: base(Parent, null, true)
{
m_Text = Text;
}
internal Terminal(Symbol Parent, string Text, Position sysPosition)
: base(Parent, sysPosition, true)
{
m_Text = Text;
}