private void ParseUnary()
{
// We only have '+' and '-' as unary operators so we don't need to check precedence and pop from stack
if (OperatorHelper.HasUnary(tokenizer.Token))
{
operators.Push(tokenizer.Token);
}
}
private void ParseNumber()
{
output.Enqueue(new TokenNumber(tokenizer.Number));
// Need to enqueue unary operators after a number
while (operators.Count != 0 && OperatorHelper.HasUnary(operators.Peek()))
{
EnqueueOperator();
}
}
private void ParseCloseParenthesis()
{
// If there is no '(' on the stack we get an exception
try {
while (operators.Peek() != TokenType.OpenParenthesis)
{
EnqueueOperator();
}
}
catch (InvalidOperationException) {
throw new SyntaxException("Missing open parenthesis");
}
operators.Pop(); // Pop '('
// Need to enqueue unary operators after a pair of parenthesis
while (operators.Count != 0 && OperatorHelper.HasUnary(operators.Peek()))
{
EnqueueOperator();
}
}
