private bool ParseFunctions(Stack<Token> operands, List<Token> rpnOutput, Token token)
{
if (token?.action == null) //token == null || token.action == null
return false;
if (operands.Count == 0 || token.Precedence > operands.Peek().Precedence)
{
operands.Push(token);
}else
{
Token e = operands.Pop();
operands.Push(token);
rpnOutput.Add(e);
}
return true;
}
private bool ParseParentheses(Stack<Token> operands, List<Token> rpnOutput, Token token)
{
if (token == null || token.action != null)
return false;
if (token.Symbol == "(")
{
operands.Push(token);
}
else
{
Token t = operands.Pop();
while (t.Symbol != "(")
{
rpnOutput.Add(t);
t = operands.Pop();
}
}
return true;
}
/// <summary>
/// This method adding tokens from outside - for example other class
/// </summary>
/// <param name="func">Token to add</param>
/// <returns>Success</returns>
public bool AddFunction(Token func)
{
if (tokens.Any(n => n.Symbol == func.Symbol))
return false;
tokens.Add(func);
return true;
}