private ParserStatus ParseBracket(char c)
{
switch (_state)
{
case ParserState.INT:
case ParserState.FLOAT:
CompleteValue();
goto case ParserState.VALUE;
case ParserState.VALUE:
case ParserState.VARIABLE:
if (c == '(' || c == '<')
{
_tree.AddNode(new MultiplicationOperNode());
}
goto case ParserState.UOPER;
case ParserState.UOPER:
case ParserState.NOPER:
case ParserState.BEGIN:
case ParserState.OPEN_PARENTHESIS:
{
if (c == '(')
{
_tree.AddNode(new ParenthesisOperNode());
_parenthesisDepth++;
_state = ParserState.OPEN_PARENTHESIS;
}
else if (c == ')')
{
if (_parenthesisDepth == 0)
{
return(EnterErrorState(ErrorType.UNPAIRED_PARENTHESIS));
}
else if (_state == ParserState.OPEN_PARENTHESIS)
{
return(EnterErrorState(ErrorType.CANNOT_PROCEED));
}
_parenthesisDepth--;
_tree.CloseParenthesis();
_state = ParserState.VALUE;
}
else if (c == '<')
{
_activeFunctionParser = FunctionParser.MakeFunctionParser(c);
_activeFunctionParser.ParseFirstChar(c);
_state = ParserState.FUNCTION;
}
else
{
return(EnterErrorState(ErrorType.UNPAIRED_PARENTHESIS));
}
return(GetSuccessState());
}
default:
return(EnterErrorState(ErrorType.UNKNOWN));
}
}
private ParserStatus ParsePartialFunction(char c)
{
if (char.IsLetter(c))
{
_cache += c;
return(GetSuccessState());
}
_activeFunctionParser = FunctionParser.MakeFunctionParser(_cache);
if (_activeFunctionParser == null)
{
return(EnterErrorState(ErrorType.INVALID_FUNCTION));
}
_state = ParserState.FUNCTION;
_cache = string.Empty;
ParseError parseError = _activeFunctionParser.ParseFirstChar(c);
return(GetSuccessState(parseError));
}