/// <summary>
/// Gets or sets a context item.
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public Token this[string key]
{
get
{
Token token = new NullToken();
if (_values.ContainsKey(key))
{
token = (Token)_values[key];
}
return(token);
}
set
{
if (!_values.ContainsKey(key))
{
_values.Add(key, value);
}
else
{
if (value == null)
{
_values.Remove(key);
}
else
{
_values[key] = value;
}
}
}
}
/// <summary>
/// Gets a Token of type AssignmentToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (AssignmentOperatorToken.__assignmentPattern.IsMatch(line))
{
token = new AssignmentOperatorToken();
}
return(token);
}
/// <summary>
/// Gets a Token of type PerenthesisToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (RangeDelimiterToken.__rangeDelimiterTokenPattern.IsMatch(line))
{
string matchText = RangeDelimiterToken.__rangeDelimiterTokenPattern.Matches(line)[0].Value;
token = new RangeDelimiterToken(matchText);
}
return(token);
}
/// <summary>
/// Gets a Token of type OperatorToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (BooleanOperatorToken.__operatorPattern.IsMatch(line))
{
string matchText = BooleanOperatorToken.__operatorPattern.Matches(line)[0].Value;
token = new BooleanOperatorToken(matchText);
}
return(token);
}
/// <summary>
/// Gets a Token of type CommentToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (CommentToken.__commentPattern.IsMatch(line))
{
string matchText = CommentToken.__commentPattern.Matches(line)[0].Value;
token = new CommentToken(matchText);
}
return(token);
}
/// <summary>
/// Gets a Token of type NumberToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (VariableToken.__variablePattern.IsMatch(line))
{
string matchText = VariableToken.__variablePattern.Matches(line)[0].Value;
token = new VariableToken(matchText);
}
return(token);
}
/// <summary>
/// Attempts to parse a token and returns success or failure.
/// </summary>
/// <param name="line">String from which to take the next token.</param>
/// <param name="token">Out parameter to send token to if successful.</param>
/// <returns></returns>
public new static bool TryParse(string line, out Token token)
{
bool parseSuccessful = false;
token = new NullToken();
if ((token = Parse(line)) is VariableToken)
{
parseSuccessful = true;
}
return(parseSuccessful);
}
/// <summary>
/// Attempts to parse a token and returns success or failure.
/// </summary>
/// <param name="line">String from which to take the next token.</param>
/// <param name="token">Out parameter to send token to if successful.</param>
/// <returns></returns>
public static bool TryParse(string line, out Token token)
{
bool parseSuccessful = false;
token = new NullToken();
if ((token = Parse(line)) is InfixFunctionToken)
{
parseSuccessful = true;
}
return(parseSuccessful);
}
/// <summary>
/// Gets a Token of type InfixFunctionToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (InfixFunctionToken.__functionPattern.IsMatch(line))
{
string matchText = InfixFunctionToken.__functionPattern.Matches(line)[0].Value;
token = new InfixFunctionToken(matchText);
}
return(token);
}
/// <summary>
/// Attempts to parse a token and returns success or failure.
/// </summary>
/// <param name="line">String from which to take the next token.</param>
/// <param name="token">Out parameter to send token to if successful.</param>
/// <returns></returns>
public static bool TryParse(string line, out Token token)
{
bool parseSuccessful = false;
token = new NullToken();
if ((token = Parse(line)) is RangeDelimiterToken)
{
parseSuccessful = true;
}
return(parseSuccessful);
}
/// <summary>
/// Gets a Token of type NumberToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public static Token ParseAsConstant(string line)
{
Token token = new NullToken();
if (NumberToken.__numberPattern.IsMatch(line))
{
string matchText = NumberToken.__numberPattern.Matches(line)[0].Value;
token = new NumberToken(matchText, "$");
}
return(token);
}
/// <summary>
/// Gets a Token of type NumberToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (NumberToken.__numberPattern.IsMatch(line))
{
string matchText = NumberToken.__numberPattern.Matches(line)[0].Value;
string value = AsDecimal(matchText);
token = new NumberToken(value, matchText);
}
return(token);
}
/// <summary>
/// Evaluates this expression.
/// </summary>
/// <returns></returns>
public override Token Evaluate()
{
Token result = new NullToken();
Token left = Operands[1].Evaluate();
Token right = Operands[0].Evaluate();
if (left is VariableToken)
{
result = right;
CalculatorContext.GetInstance()[left.ToString()] = result;
}
return(result);
}
/// <summary>
/// Evaluates this expression.
/// </summary>
/// <returns></returns>
public override Token Evaluate()
{
Token result = new NullToken();
Token left = EvaluateOperand(1);
Token right = EvaluateOperand(0);
double dLeft = 0.0;
double dRight = 0.0;
if (double.TryParse(left.ToString(), out dLeft) && double.TryParse(right.ToString(), out dRight))
{
switch (Precedence)
{
case ExpressionPrecedence.Add:
result = new NumberToken((dLeft + dRight).ToString());
break;
case ExpressionPrecedence.Subtract:
result = new NumberToken((dLeft - dRight).ToString());
break;
case ExpressionPrecedence.MultiplyOrDivide:
if (Operation.ToString().Equals("/", StringComparison.InvariantCultureIgnoreCase))
{
if (right.ToString().Equals("0", StringComparison.InvariantCultureIgnoreCase))
{
throw new DivideByZeroException();
}
else
{
result = new NumberToken((dLeft / dRight).ToString());
}
}
else if (Operation.ToString().Equals("*"))
{
result = new NumberToken((dLeft * dRight).ToString());
}
break;
}
}
else
{
throw new FormatException(String.Format("Could not parse double value from {0} for arithmetic expression.", left.ToString()));
}
return(result);
}
/// <summary>
/// Gets a Token of type PrefixFunctionToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (PrefixFunctionToken.__functionPattern.IsMatch(line))
{
string matchText = PrefixFunctionToken.__functionPattern.Matches(line)[0].Value;
if (matchText.Equals("-(", StringComparison.InvariantCultureIgnoreCase))
{
matchText = "-";
}
token = new PrefixFunctionToken(matchText);
}
return(token);
}
/// <summary>
/// Gets a Token of type SetContainerToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (SetContainerToken.__setContainerPattern.IsMatch(line))
{
string matchText = SetContainerToken.__setContainerPattern.Matches(line)[0].Value;
token = new SetContainerToken(matchText);
if (matchText.Equals("[", StringComparison.InvariantCultureIgnoreCase))
{
((SetContainerToken)token)._setContainerType = SetContainerTokenType.Open;
}
else
{
((SetContainerToken)token)._setContainerType = SetContainerTokenType.Closed;
}
}
return(token);
}
/// <summary>
/// Gets a Token of type PerenthesisToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (PerenthesisToken.__perenPattern.IsMatch(line))
{
string matchText = PerenthesisToken.__perenPattern.Matches(line)[0].Value;
token = new PerenthesisToken(matchText);
if (matchText.Equals("(", StringComparison.InvariantCultureIgnoreCase))
{
((PerenthesisToken)token)._perenthesisType = PerenthesisTokenType.Open;
}
else
{
((PerenthesisToken)token)._perenthesisType = PerenthesisTokenType.Closed;
}
}
return(token);
}
/// <summary>
/// Gets a Token of type ConstantToken from the beginning of a line of text.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (ConstantToken.__constantPattern.IsMatch(line))
{
string matchText = ConstantToken.__constantPattern.Matches(line)[0].Value;
if (matchText.Equals("e", StringComparison.InvariantCultureIgnoreCase))
{
token = new ConstantToken(Math.E.ToString(), matchText);
}
else if (matchText.Equals("pi", StringComparison.InvariantCultureIgnoreCase))
{
token = new ConstantToken(Math.PI.ToString(), matchText);
}
else if (matchText.Equals("phi", StringComparison.InvariantCultureIgnoreCase))
{
token = new ConstantToken("1.61803398874989", matchText);
}
}
return(token);
}
/// <summary>
/// Gets a Token of type LastResultToken from the beginning of a line of text. The resulting token
/// needs to be a value token, like BooleanToken or NumberToken.
/// </summary>
/// <param name="line"></param>
/// <returns></returns>
public new static Token Parse(string line)
{
Token token = new NullToken();
if (LastResultToken.__constantPattern.IsMatch(line))
{
string matchText = LastResultToken.__constantPattern.Matches(line)[0].Value;
if (matchText.Equals("$", StringComparison.InvariantCultureIgnoreCase))
{
token = new LastResultToken(CalculatorContext.GetInstance().GetLastResult(), matchText);
Token intermediateToken = new NullToken();
if (NumberToken.TryParse(token.ToString(), out intermediateToken, true) ||
BooleanToken.TryParse(token.ToString(), out intermediateToken, true))
{
token = intermediateToken;
}
}
}
return(token);
}
/// <summary>
/// Evaluates this expression.
/// </summary>
/// <returns></returns>
public override Token Evaluate()
{
Token result = new NullToken();
Token left = EvaluateOperand(1);
Token right = EvaluateOperand(0);
if (left is NumberToken && right is NumberToken)
{
double dLeft = 0.0;
double dRight = 0.0;
if (double.TryParse(left.ToString(), out dLeft) && double.TryParse(right.ToString(), out dRight))
{
if (Operation.ToString().Equals("==", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((dLeft == dRight).ToString());
}
else if (Operation.ToString().Equals("<=", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((dLeft <= dRight).ToString());
}
else if (Operation.ToString().Equals(">=", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((dLeft >= dRight).ToString());
}
else if (Operation.ToString().Equals("<", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((dLeft < dRight).ToString());
}
else if (Operation.ToString().Equals(">", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((dLeft > dRight).ToString());
}
else if (Operation.ToString().Equals("!=", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((dLeft != dRight).ToString());
}
else
{
throw new MalformedExpressionException(String.Format("Unknown boolean operator {0}.", Operation));
}
}
else
{
throw new FormatException(String.Format("Could not parse double value from {0} for boolean expression.", left.ToString()));
}
}
else if (left is BooleanToken && right is BooleanToken)
{
bool bLeft = false;
bool bRight = false;
if (bool.TryParse(left.ToString(), out bLeft) && bool.TryParse(right.ToString(), out bRight))
{
if (Operation.ToString().Equals("==", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((bLeft == bRight).ToString());
}
else if (Operation.ToString().Equals("!=", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((bLeft != bRight).ToString());
}
else
{
throw new MalformedExpressionException("Booleans cannot be less than or greater than each other.");
}
}
else
{
throw new FormatException(String.Format("Could not parse bool value from {0} for boolean expression.", left.ToString()));
}
}
else
{
throw new MalformedExpressionException(String.Concat(ToString(), " is not a valid boolean expression."));
}
return(result);
}
/// <summary>
/// Parses tokens out of the string given.
/// </summary>
/// <param name="line"></param>
private void ParseTokens(string line)
{
string internalLine = line;
Regex spaceRegex = new Regex("^[\\s]+", RegexOptions.Compiled | RegexOptions.CultureInvariant);
TokenParseState tokenParseState = new NullTokenParseState();
while (!String.IsNullOrEmpty(internalLine))
{
Token token = new NullToken();
bool tokenIsValid = false;
if (spaceRegex.IsMatch(internalLine))
{
int length = spaceRegex.Matches(internalLine)[0].Value.Length;
internalLine = RemoveToken(length, internalLine);
}
else
{
tokenIsValid = tokenParseState.GetNextToken(internalLine, out token, out tokenParseState);
#region Old Conditional Code
// if (lastToken is NullToken)
// {
// if (GetFirstToken(internalLine, out token))
// {
// tokenIsValid = true;
// }
// else if (InfixFunctionToken.TryParse(internalLine, out token)
// || ArithmeticOperatorToken.TryParse(internalLine, out token)
// || BinaryOperatorToken.TryParse(internalLine, out token)
// || BooleanOperatorToken.TryParse(internalLine, out token)
// || PostfixFunctionToken.TryParse(internalLine, out token))
// {
// _tokens.Add(CalculatorContext.GetInstance()[CalculatorContext.LastResult]);
// lastToken = _tokens[0];
// }
// else
// {
// throw new InvalidTokenException(String.Format("Invalid or unrecognized token at {0}.", internalLine));
// }
// }
// else if (lastToken is VariableToken)
// {
// if ((PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisType.Closed)
// || InfixFunctionToken.TryParse(internalLine, out token)
// || ArithmeticOperatorToken.TryParse(internalLine, out token)
// || BinaryOperatorToken.TryParse(internalLine, out token)
// || BooleanOperatorToken.TryParse(internalLine, out token)
// || PostfixFunctionToken.TryParse(internalLine, out token)
// || AssignmentOperatorToken.TryParse(internalLine, out token)
// || CommentToken.TryParse(internalLine, out token))
// {
// tokenIsValid = true;
// }
// }
// else if (lastToken is NumberToken || lastToken is BooleanToken)
// {
// if ((PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisType.Closed)
// || InfixFunctionToken.TryParse(internalLine, out token)
// || ArithmeticOperatorToken.TryParse(internalLine, out token)
// || BinaryOperatorToken.TryParse(internalLine, out token)
// || BooleanOperatorToken.TryParse(internalLine, out token)
// || PostfixFunctionToken.TryParse(internalLine, out token)
// || CommentToken.TryParse(internalLine, out token))
// {
// tokenIsValid = true;
// }
// }
// else if (lastToken is PerenthesisToken)
// {
// if (PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == ((PerenthesisToken)lastToken).PerenthesisType
// || CommentToken.TryParse(internalLine, out token))
// {
// tokenIsValid = true;
// }
// else if (((PerenthesisToken)lastToken).PerenthesisType == PerenthesisType.Open)
// {
// if (PrefixFunctionToken.TryParse(internalLine, out token)
// || BooleanToken.TryParse(internalLine, out token)
// || VariableToken.TryParse(internalLine, out token)
// || ConstantToken.TryParse(internalLine, out token)
// || NumberToken.TryParse(internalLine, out token)
// || LastResultToken.TryParse(internalLine, out token))
// {
// tokenIsValid = true;
// }
// }
// else
// {
// if (InfixFunctionToken.TryParse(internalLine, out token)
// || ArithmeticOperatorToken.TryParse(internalLine, out token)
// || BinaryOperatorToken.TryParse(internalLine, out token)
// || BooleanOperatorToken.TryParse(internalLine, out token)
// || PostfixFunctionToken.TryParse(internalLine, out token))
// {
// tokenIsValid = true;
// }
// }
// }
// else if (lastToken is PrefixFunctionToken
// && ((PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisType.Open)
// || lastToken.ToString().Equals("!", StringComparison.InvariantCultureIgnoreCase)
// && (BooleanToken.TryParse(internalLine, out token)
// || VariableToken.TryParse(internalLine, out token)
// || ConstantToken.TryParse(internalLine, out token)
// || NumberToken.TryParse(internalLine, out token))))
// {
// tokenIsValid = true;
// }
// else if (lastToken is InfixFunctionToken || lastToken is OperatorToken)
// {
// if (PrefixFunctionToken.TryParse(internalLine, out token)
// || BooleanToken.TryParse(internalLine, out token)
// || VariableToken.TryParse(internalLine, out token)
// || ConstantToken.TryParse(internalLine, out token)
// || NumberToken.TryParse(internalLine, out token)
// || LastResultToken.TryParse(internalLine, out token)
// || (PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisType.Open)
// || CommentToken.TryParse(internalLine, out token))
// {
// tokenIsValid = true;
// }
// }
// else if (lastToken is PostfixFunctionToken)
// {
// if ((PerenthesisToken.TryParse(internalLine, out token) && ((PerenthesisToken)token).PerenthesisType == PerenthesisType.Closed)
// || InfixFunctionToken.TryParse(internalLine, out token)
// || ArithmeticOperatorToken.TryParse(internalLine, out token)
// || BinaryOperatorToken.TryParse(internalLine, out token)
// || BooleanOperatorToken.TryParse(internalLine, out token)
// || PostfixFunctionToken.TryParse(internalLine, out token)
// || CommentToken.TryParse(internalLine, out token))
// {
// tokenIsValid = true;
// }
// }
// else
// {
// throw new InvalidTokenException(String.Format("Invalid or unrecognized token at {0}.", internalLine));
// }
#endregion
if (tokenIsValid)
{
internalLine = AddTokenToCollection(token, internalLine);
_context[CalculatorContext.LastToken] = token;
}
CheckForLastResultImplication();
}
}
}
/// <summary>
/// Evaluates this expression.
/// </summary>
/// <returns></returns>
public override Token Evaluate()
{
Token result = new NullToken();
string op = Operation.ToString();
bool modeIsDegrees = CalculatorContext.GetInstance()[CalculatorContext.Mode].ToString().Equals("deg", StringComparison.InvariantCultureIgnoreCase);
if (Operation is PrefixFunctionToken)
{
Token val = EvaluateOperand(0);
double res = 0.0;
if (double.TryParse(val.ToString(), out res))
{
if (op.Equals("abs", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((Math.Abs(res)).ToString());
}
else if (op.Equals("cosh", StringComparison.InvariantCultureIgnoreCase))
{
if (modeIsDegrees)
{
res = ToRadians(res);
}
res = Math.Cosh(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("sinh", StringComparison.InvariantCultureIgnoreCase))
{
if (modeIsDegrees)
{
res = ToRadians(res);
}
res = Math.Sinh(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("tanh", StringComparison.InvariantCultureIgnoreCase))
{
if (modeIsDegrees)
{
res = ToRadians(res);
}
res = Math.Tanh(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("cos", StringComparison.InvariantCultureIgnoreCase))
{
if (modeIsDegrees)
{
res = ToRadians(res);
}
res = Math.Cos(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("sin", StringComparison.InvariantCultureIgnoreCase))
{
if (modeIsDegrees)
{
res = ToRadians(res);
}
res = Math.Sin(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("tan", StringComparison.InvariantCultureIgnoreCase))
{
if (modeIsDegrees)
{
res = ToRadians(res);
}
res = Math.Tan(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("acos", StringComparison.InvariantCultureIgnoreCase))
{
res = modeIsDegrees ? ToDegrees(Math.Acos(res)) : Math.Acos(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("asin", StringComparison.InvariantCultureIgnoreCase))
{
res = modeIsDegrees ? ToDegrees(Math.Asin(res)) : Math.Acos(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("atan", StringComparison.InvariantCultureIgnoreCase))
{
res = modeIsDegrees ? ToDegrees(Math.Atan(res)) : Math.Acos(res);
result = new NumberToken(res.ToString());
}
else if (op.Equals("log", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((Math.Log10(res)).ToString());
}
else if (op.Equals("ln", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((Math.Log(res)).ToString());
}
else if (op.Equals("lb", StringComparison.InvariantCultureIgnoreCase) || op.Equals("ld", StringComparison.InvariantCultureIgnoreCase) || op.Equals("lg", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((Math.Log(res) / Math.Log(2.0)).ToString());
}
else if (op.Equals("deg", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((ToDegrees(res)).ToString());
}
else if (op.Equals("rad", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((ToRadians(res)).ToString());
}
else if (op.Equals("sqrt", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((Math.Sqrt(res)).ToString());
}
else if (op.Equals("too", StringComparison.InvariantCultureIgnoreCase))
{
CalculatorContext.GetInstance()[CalculatorContext.DisplayBase] = new NumberToken("8");
result = new NumberToken(val);
}
else if (op.Equals("tod", StringComparison.InvariantCultureIgnoreCase))
{
CalculatorContext.GetInstance()[CalculatorContext.DisplayBase] = new NumberToken("10");
result = new NumberToken(val);
}
else if (op.Equals("toh", StringComparison.InvariantCultureIgnoreCase))
{
CalculatorContext.GetInstance()[CalculatorContext.DisplayBase] = new NumberToken("16");
result = new NumberToken(val);
}
else if (op.Equals("tob", StringComparison.InvariantCultureIgnoreCase))
{
CalculatorContext.GetInstance()[CalculatorContext.DisplayBase] = new NumberToken("2");
result = new NumberToken(val);
}
else if (op.Equals("-", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((res * (-1)).ToString());
}
else if (op.Equals("!", StringComparison.InvariantCultureIgnoreCase))
{
if (val is BooleanToken)
{
result = ((BooleanToken)val).Not();
}
else if (val is NumberToken)
{
result = ((NumberToken)val).Negate();
}
}
}
else
{
throw new FormatException(String.Format("Could not parse double value from {0}", val));
}
}
else if (Operation is InfixFunctionToken)
{
Token left = EvaluateOperand(1);
Token right = EvaluateOperand(0);
double dLeft = 0.0;
double dRight = 0.0;
if (double.TryParse(left.ToString(), out dLeft) && double.TryParse(right.ToString(), out dRight))
{
if (op.Equals("**", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((Math.Pow(dLeft, dRight)).ToString());
}
else if (op.Equals("%", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((dLeft % dRight).ToString());
}
else if (op.Equals("//", StringComparison.InvariantCultureIgnoreCase))
{
if ((left is NumberToken && right is NumberToken))
{
long lLeft = 0;
long lRight = 0;
if ((long.TryParse(((NumberToken)left).WholePart(), out lLeft) && long.TryParse(((NumberToken)right).WholePart(), out lRight)))
{
long rem = 0;
long whole = Math.DivRem(lLeft, lRight, out rem);
result = new NumberToken(whole.ToString());
}
}
else
{
throw new FormatException(String.Format("Could not parse long values from {0} or {1}.", left, right));
}
}
}
else
{
throw new FormatException(String.Format("Could not parse double values from {0} or {1}.", left, right));
}
}
else if (Operation is PostfixFunctionToken)
{
Token val = EvaluateOperand(0);
double res = 0.0;
if (double.TryParse(val.ToString(), out res))
{
if (op.Equals("!", StringComparison.InvariantCultureIgnoreCase))
{
if (Operation is PostfixFunctionToken)
{
double counter = res;
double total = counter;
while (counter > 1)
{
counter--;
total *= counter;
}
result = new NumberToken(total.ToString());
}
}
}
else
{
throw new FormatException(String.Format("Could not parse double value from {0}", val));
}
}
else
{
throw new InvalidTokenException(String.Format("Operation {0} not currently supported. Please submit a feature request.", Operation));
}
return(result);
}
/// <summary>
/// Evaluates this expression.
/// </summary>
/// <returns></returns>
public override Token Evaluate()
{
Token result = new NullToken();
Token left = EvaluateOperand(1);
Token right = EvaluateOperand(0);
if (left is NumberToken && right is NumberToken)
{
long lLeft = 0;;
long lRight = 0;;
if (long.TryParse(((NumberToken)left).WholePart(), out lLeft) && long.TryParse(((NumberToken)right).WholePart(), out lRight))
{
if (Operation.ToString().Equals("&", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((lLeft & lRight).ToString());
}
else if (Operation.ToString().Equals("|", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((lLeft | lRight).ToString());
}
else if (Operation.ToString().Equals("^", StringComparison.InvariantCultureIgnoreCase))
{
result = new NumberToken((lLeft ^ lRight).ToString());
}
else
{
throw new FormatException(String.Format("Could not parse long value from {0} for binary expression.", left.ToString()));
}
}
}
else if (left is BooleanToken && right is BooleanToken)
{
bool bLeft = false;
bool bRight = false;
if (bool.TryParse(left.ToString(), out bLeft) && bool.TryParse(right.ToString(), out bRight))
{
if (Operation.ToString().Equals("&", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((bLeft & bRight).ToString());
}
else if (Operation.ToString().Equals("|", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((bLeft | bRight).ToString());
}
else if (Operation.ToString().Equals("^", StringComparison.InvariantCultureIgnoreCase))
{
result = new BooleanToken((bLeft ^ bRight).ToString());
}
else
{
throw new FormatException(String.Format("Could not parse bool value from {0} for binary expression.", left.ToString()));
}
}
}
else
{
throw new MalformedExpressionException(String.Concat(ToString(), " is not a valid binary expression."));
}
return(result);
}
