public bool RemoveRule(GrammarRule rule)
{
HashSet<Word> insertions;
if (rules.TryGetValue(rule.WordToReplace, out insertions) &&
insertions.Remove(rule.WordToInsert))
{
if (insertions.Count == 0)
rules.Remove(rule.WordToReplace);
return true;
}
return false;
}
public bool AddRule(GrammarRule rule)
{
if (rule.WordToReplace == rule.WordToInsert)
return false;
HashSet<Word> insertions;
if (!rules.TryGetValue(rule.WordToReplace, out insertions))
{
insertions = new HashSet<Word>();
rules[rule.WordToReplace] = insertions;
}
return insertions.Add(rule.WordToInsert);
}
