//---------------------------------------------------------------------
public void Validate()
{
if (_paranthesisStack.Count > 0)
{
Paranthesis paranthesis = _paranthesisStack.Pop();
throw ParsingException.ParanthesisNotMatched(paranthesis);
}
}
//---------------------------------------------------------------------
private void CheckIntrinsic(Token current)
{
if (!(_lastToken is Intrinsic) || current is LeftParanthesis)
{
return;
}
throw ParsingException.IntrinsicNoFollowedByLeftParanthesis(_lastToken as Intrinsic);
}
//---------------------------------------------------------------------
public void Visit(ValueToken valueToken)
{
this.CheckIntrinsic(valueToken);
if (_lastToken is ValueToken)
{
throw ParsingException.ValueFollowedByValue(_lastToken as ValueToken, valueToken);
}
_lastToken = valueToken;
}
//---------------------------------------------------------------------
public void Visit(Operation operation)
{
this.CheckIntrinsic(operation);
if (_lastToken is Operation && !(operation is Exponentation))
{
throw ParsingException.OperationFollowedByOperation(_lastToken, operation);
}
_lastToken = operation;
}
//---------------------------------------------------------------------
public void Visit(RightParanthesis paranthesis)
{
this.CheckIntrinsic(paranthesis);
if (_paranthesisStack.Count == 0 || !(_paranthesisStack.Peek() is LeftParanthesis))
{
throw ParsingException.NoLeftParanthesis(paranthesis);
}
_paranthesisStack.Pop();
_lastToken = paranthesis;
}
