/// <summary> /// Gets the next token while within a variable token parse state. /// </summary> /// <param name="internalLine"></param> /// <param name="token"></param> /// <param name="state"></param> /// <returns></returns> public override bool GetNextToken(string internalLine, out Token token, out TokenParseState state) { bool result = false; if ((result = PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisTokenType.Closed)) { state = new PerenthesisTokenParseState(); } else if ((result = InfixFunctionToken.TryParse(internalLine, out token) || ArithmeticOperatorToken.TryParse(internalLine, out token) || BinaryOperatorToken.TryParse(internalLine, out token) || BooleanOperatorToken.TryParse(internalLine, out token) || AssignmentOperatorToken.TryParse(internalLine, out token))) { state = new InfixOperationParseState(); } else if ((result = PostfixFunctionToken.TryParse(internalLine, out token))) { state = new PostfixFunctionParseState(); } else if ((result = CommentToken.TryParse(internalLine, out token))) { state = new NullTokenParseState(); } else { state = new InvalidTokenParseState(); } return(result); }
/// <summary> /// Gets the next token while within an infix operation parse state. /// </summary> /// <param name="internalLine"></param> /// <param name="token"></param> /// <param name="state"></param> /// <returns></returns> public override bool GetNextToken(string internalLine, out Token token, out TokenParseState state) { bool result = false; if ((result = PrefixFunctionToken.TryParse(internalLine, out token))) { state = new PrefixFunctionTokenParseState(); } else if ((result = BooleanToken.TryParse(internalLine, out token) || ConstantToken.TryParse(internalLine, out token) || NumberToken.TryParse(internalLine, out token) || LastResultToken.TryParse(internalLine, out token))) { state = new ValueTokenParseState(); } else if ((result = VariableToken.TryParse(internalLine, out token))) { state = new VariableTokenParseState(); } else if ((result = (PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisTokenType.Open))) { state = new PerenthesisTokenParseState(); } else if ((result = CommentToken.TryParse(internalLine, out token))) { state = new NullTokenParseState(); } else { state = new InvalidTokenParseState(); } return(result); }
/// <summary> /// Gets the next token while within ta prefix function token parse state. /// </summary> /// <param name="internalLine"></param> /// <param name="token"></param> /// <param name="state"></param> /// <returns></returns> public override bool GetNextToken(string internalLine, out Token token, out TokenParseState state) { bool result = false; Token lastToken = CalculatorContext.GetInstance()[CalculatorContext.LastToken]; if ((result = (PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisTokenType.Open))) { state = new PerenthesisTokenParseState(); } else if (lastToken.ToString().Equals("!", StringComparison.InvariantCultureIgnoreCase)) { if ((result = BooleanToken.TryParse(internalLine, out token) || ConstantToken.TryParse(internalLine, out token) || NumberToken.TryParse(internalLine, out token))) { state = new ValueTokenParseState(); } else if ((result = VariableToken.TryParse(internalLine, out token))) { state = new VariableTokenParseState(); } else { state = new InvalidTokenParseState(); } } else { state = new InvalidTokenParseState(); } return(result); }
/// <summary> /// Gets the next token while within a perenthesis token parse state. /// </summary> /// <param name="internalLine"></param> /// <param name="token"></param> /// <param name="state"></param> /// <returns></returns> public override bool GetNextToken(string internalLine, out Token token, out TokenParseState state) { bool result = false; Token lastToken = CalculatorContext.GetInstance()[CalculatorContext.LastToken]; if ((result = PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == ((PerenthesisToken)lastToken).PerenthesisType)) { state = new PerenthesisTokenParseState(); } else if ((result = CommentToken.TryParse(internalLine, out token))) { state = new NullTokenParseState(); } else if (((PerenthesisToken)lastToken).PerenthesisType == PerenthesisTokenType.Open) { if ((result = PrefixFunctionToken.TryParse(internalLine, out token))) { state = new PrefixFunctionTokenParseState(); } else if ((result = BooleanToken.TryParse(internalLine, out token) || ConstantToken.TryParse(internalLine, out token) || NumberToken.TryParse(internalLine, out token) || LastResultToken.TryParse(internalLine, out token))) { state = new ValueTokenParseState(); } else if ((result = VariableToken.TryParse(internalLine, out token))) { state = new VariableTokenParseState(); } else { state = new InvalidTokenParseState(); } } else if ((result = InfixFunctionToken.TryParse(internalLine, out token) || ArithmeticOperatorToken.TryParse(internalLine, out token) || BinaryOperatorToken.TryParse(internalLine, out token) || BooleanOperatorToken.TryParse(internalLine, out token))) { state = new InfixOperationParseState(); } else if ((result = PostfixFunctionToken.TryParse(internalLine, out token))) { state = new PostfixFunctionParseState(); } else { state = new InvalidTokenParseState(); } return(result); }
/// <summary> /// Gets the next Token if the last token was a NullToken. It first tries to get a normal, /// valid first token. If that fails, then it checks for a normal secondary token, and if /// that passes then the context LastResultIsImplied is set to true. /// </summary> /// <param name="internalLine"></param> /// <param name="token"></param> /// <returns></returns> public override bool GetNextToken(string internalLine, out Token token, out TokenParseState state) { bool result = false; if ((result = PerenthesisToken.TryParse(internalLine, out token))) { state = new PerenthesisTokenParseState(); } else if ((result = PrefixFunctionToken.TryParse(internalLine, out token))) { state = new PrefixFunctionTokenParseState(); } else if ((result = BooleanToken.TryParse(internalLine, out token) || ConstantToken.TryParse(internalLine, out token) || NumberToken.TryParse(internalLine, out token) || LastResultToken.TryParse(internalLine, out token))) { state = new ValueTokenParseState(); } else if ((result = VariableToken.TryParse(internalLine, out token))) { state = new VariableTokenParseState(); } else if ((result = InfixFunctionToken.TryParse(internalLine, out token) || ArithmeticOperatorToken.TryParse(internalLine, out token) || BinaryOperatorToken.TryParse(internalLine, out token) || BooleanOperatorToken.TryParse(internalLine, out token))) { state = new InfixOperationParseState(); CalculatorContext.GetInstance().LastResultIsImplied = true; } else if ((result = PostfixFunctionToken.TryParse(internalLine, out token))) { state = new PostfixFunctionParseState(); CalculatorContext.GetInstance().LastResultIsImplied = true; } else { state = new InvalidTokenParseState(); } return(result); }