private void Expacc()
{
_currentNode.AddChild(new ParseNode(ParseEnum.ExpressionAccent));
_currentNode = _currentNode.GetChildren()[_currentNode.GetChildren().Count - 1];
if (_current is AddSub)
{
_currentNode.AddChild(new ParseNode(ParseEnum.Operator, _current.GetValue()));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
Term();
Expacc();
}
else if (_current is Equals)
{
_currentNode.AddChild(new ParseNode(ParseEnum.Equals));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
Expressie();
}
else
{
_currentNode.AddChild(new ParseNode(ParseEnum.Empty));
}
_currentNode = _currentNode.GetParent();
}
public ParseNode Parse()
{
_current = _lex.GetNextToken();
try
{
Expressie();
}
catch (MatchException me)
{
Console.WriteLine(me.Message);
}
return _start;
}
private void Factor()
{
_currentNode.AddChild(new ParseNode(ParseEnum.Factor));
_currentNode = _currentNode.GetChildren()[_currentNode.GetChildren().Count - 1];
if (_current is OpenParenthesis)
{
_currentNode.AddChild(new ParseNode(ParseEnum.OpenParenthesis));
_current = _lex.GetNextToken();
Expressie();
if (_current is CloseParenthesis)
{
_currentNode.AddChild(new ParseNode(ParseEnum.CloseParenthesis));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
}
}
else if (_current is Variable)
{
_currentNode.AddChild(new ParseNode(ParseEnum.Variable, _current.GetValue()));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
}
else if (_current is Number)
{
_currentNode.AddChild(new ParseNode(ParseEnum.Number, _current.GetValue()));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
}
else
{
Console.WriteLine("Syntaxfout.");
Stop();
}
_currentNode = _currentNode.GetParent();
}
private void Termacc()
{
_currentNode.AddChild(new ParseNode(ParseEnum.TermAccent));
_currentNode = _currentNode.GetChildren()[_currentNode.GetChildren().Count - 1];
if (_current is Operator)
{
_currentNode.AddChild(new ParseNode(ParseEnum.Operator, _current.GetValue()));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
Factor();
Termacc();
}
else
{
_currentNode.AddChild(new ParseNode(ParseEnum.Empty));
}
_currentNode = _currentNode.GetParent();
}