/// <summary>
/// Creates a new SequenceItem from an input file token.
/// </summary>
/// <param name="token">The token, containing a positionrecord's name and some modifiers.</param>
/// <returns>A SequenceItem created from this token.</returns>
public static SequenceItem FromToken(string token)
{
// List of modifiers that specify details about how the item can be matched.
List <char> modifiers = new List <char>();
// Strip the end of the token from its modifiers, and
// store those modifiers in the list.
while (isModifier(token[token.Length - 1]))
{
modifiers.Add(token[token.Length - 1]);
token = token.Substring(0, token.Length - 1);
}
// If the name still contains any characters that are not alphanumeric,
// throw an exception.
if (!isAlphanumeric(token))
{
throw new MalformedException(string.Format("Name must be alphanumeric, and all modifiers should appear at the end of the name. This token is invalid: {0}", token));
}
SequenceItem rv = new SequenceItem(token);
rv.Position = PositionParser.GetByName(token);
rv.parseModifiers(modifiers);
return(rv);
}
/// <summary>
/// Creates a new SequenceItem with this name.
/// </summary>
/// <param name="name">The new sequenceitem's name.</param>
private SequenceItem(string name)
{
Position = PositionParser.GetByName(name);
transition = new HashSet <PositionRecord>();
leniency = new HashSet <PositionRecord>();
}
