private static Expression ParsePrefix(ref string s)
{
s = s.TrimEnd();
if (s.Length < 2)
{
return(1);
}
if (Prefixes.TryGetValue(DeAliasPrefix(s[s.Length - 1].ToString()), out int prefix))
{
// Make sure this isn't just part of the word before the prefix.
if (char.IsDigit(s[s.Length - 2]) || char.IsWhiteSpace(s[s.Length - 2]))
{
s = s.Substring(0, s.Length - 1);
return(((Real)10) ^ prefix);
}
}
return(1);
}
public string GetPrefix(ulong?id) => id == null || !Prefixes.TryGetValue(id.Value, out var prefix) ? DefaultPrefix : prefix;