public override void Parse(IList <char> input)
{
Term = new TermExpression();
Term.Parse(input);
if (input.Count == 0)
{
return;
}
if (input[0] != '-' && input[0] != '+')
{
return;
}
if (input[0] == '-')
{
IsSubtraction = true;
}
input.RemoveAt(0);
if (input.Count == 0)
{
throw new UnexpectedTokenException();
}
Expression = new ExpressionsExpression();
Expression.Parse(input);
}
public override void Parse(IList <char> input)
{
if (input[0] == '(')
{
input.RemoveAt(0);
if (input.Count == 0)
{
throw new UnexpectedTokenException();
}
Expression = new ExpressionsExpression();
Expression.Parse(input);
if (input.Count == 0)
{
throw new UnexpectedTokenException();
}
if (input[0] != ')')
{
throw new UnexpectedTokenException(input[0].ToString(), "')'");
}
input.RemoveAt(0);
}
else
{
//var numberStr = "";
//do
//{
// numberStr += input[0];
// input.RemoveAt(0);
//} while (input.Count > 0 && char.IsDigit(input[0]));
//Number = double.Parse(numberStr);
var numberStr = "";
if (input[0] == '-')
{
numberStr += '-';
input.RemoveAt(0);
}
if (input.Count == 0)
{
throw new UnexpectedTokenException();
}
do
{
numberStr += input[0];
input.RemoveAt(0);
} while (input.Count > 0 && (char.IsDigit(input[0]) || input[0] == '.'));
if (double.TryParse(numberStr, out double temp))
{
Number = temp;
}
else
{
throw new UnexpectedTokenException(numberStr);
}
}
}
