private static string ReadLettersOrDigits(SourceQueue characters)
{
var buffer = new StringBuilder();
while (characters.Any() && (char.IsLetterOrDigit(characters.Peek()) || (characters.Peek() == '_')))
{
buffer.Append(characters.Dequeue());
}
return(buffer.ToString());
}
private static string ReadDigits(SourceQueue characters)
{
var buffer = new StringBuilder();
int separatorsBudget = 1;
while (characters.Any() && (char.IsDigit(characters.Peek()) || ((separatorsBudget > 0) && (characters.Peek() == '.'))))
{
var c = characters.Dequeue();
buffer.Append(c);
if (c == '.')
{
separatorsBudget -= 1;
}
}
return(buffer.ToString());
}