internal bool RpnConvert()
{
if (convertedToken != null)
{
return(true);
}
if (tokens.Count == 0)
{
return(false);
}
tryConvert = true;
if (tokens.Count == 1)
{
convertedToken = tokens[0];
return(true);
}
List <ExpressionTermToken> stack = new List <ExpressionTermToken>();
List <ExpressionTermToken> source = new List <ExpressionTermToken>();
try
{
source.AddRange(tokens);
while (source.Count != 0)
{
ExpressionTermToken token = source[0];
source.RemoveAt(0);
if (token.IsOperator)
{
OperandToken right = (OperandToken)stack[stack.Count - 1];
stack.RemoveAt(stack.Count - 1);
OperandToken left = (OperandToken)stack[stack.Count - 1];
stack.RemoveAt(stack.Count - 1);
stack.Add((ExpressionTermToken)(new SubExpressionToken(left, right, (OperatorToken)token)));
}
else
{
stack.Add(token);
}
}
}
catch (Exception)
{
return(false);
}
if (stack.Count != 1)
{
return(false);
}
convertedToken = stack[0];
return(true);
}
internal SubExpressionToken(OperandToken leftToken, OperandToken rightToken, OperatorToken opToken)
{
p1 = leftToken;
p2 = rightToken;
op = opToken;
}
