/// <summary>
/// Attempts to either look up the symbol or convert it to one
/// </summary>
/// <param name="symbol"></param>
/// <returns></returns>
private Symbol ToSymbol(string symbol)
{
if (SYMBOLS.ContainsKey(symbol))
{
return(SYMBOLS[symbol]);
}
else if (OPERATORS.ContainsKey(symbol))
{
return(OPERATORS[symbol]);
}
else if (FUNCTIONS.ContainsKey(symbol))
{
return(FUNCTIONS[symbol]);
}
else if (IsNumeric(symbol))
{
return(new Symbol(double.Parse(symbol)));
}
else if (IsVariable(symbol))
{
return(new Symbol(symbol));
}
throw new Exception("ToSymbol : " + symbol + " cannot be converted to a Symbol");
}
/// <summary>
/// Tests if a given input is contained in any of the Symbol Dictionaries
/// </summary>
/// <param name="symbol"></param>
/// <returns></returns>
private bool IsDefined(string symbol)
{
return(SYMBOLS.ContainsKey(symbol) ||
OPERATORS.ContainsKey(symbol) ||
FUNCTIONS.ContainsKey(symbol));
}
//Test if is an operator
private bool IsOperator(string token)
{
return(OPERATORS.ContainsKey(token) || FUNCTIONS.ContainsKey(token));
}