LexicalScanResult NextSingleSymbol(LexicalScanResultType type)
{
var result = new LexicalScanResult(_expression[_current], type);
_current++;
return(result);
}
public LexicalScanResult Next()
{
if (_current >= _expression.Length)
{
_currentResult = null;
}
else if (_expression[_current] == '(')
{
_currentResult = NextSingleSymbol(LexicalScanResultType.BracketOpen);
}
else if (_expression[_current] == ')')
{
_currentResult = NextSingleSymbol(LexicalScanResultType.BracketClose);
}
else if (_expression[_current] == ',')
{
_currentResult = NextSingleSymbol(LexicalScanResultType.ParameterDelimiter);
}
else if ("+-*/".Contains(_expression[_current].ToString()))
{
_currentResult = NextSingleSymbol(LexicalScanResultType.Operation);
}
else if ("0123456789".Contains(_expression[_current].ToString()))
{
_currentResult = NextNumeric();
}
else
{
_currentResult = NextFunctionOrVariable();
}
return(_currentResult);
}
