public Level Analyze(Session ses, Tokens tokens)
{
Level lvl = new Level(this);
ses.Leaf = lvl;
tokens.SetLevel(lvl);
// Match parameters
for (int i = 0; i < Parameters.Count; i++)
{
Parameter p = Parameters[i];
p.Update(ses);
MatchResult res = p.Analyze(ses, tokens, lvl);
// if no tokens left, leave unmatched alone (to match previous params)
// else, update so that later ones would not go back before the param
// this also ensures auto completion even if the word is already completed
// TODO: unmatched might jump back (e.g. "task name -s")
if (tokens.Count == 0)
break;
if (res == MatchResult.Matched)
lvl.FirstUnmatchedParam = i + 1;
else if (res == MatchResult.Extensible)
lvl.FirstUnmatchedParam = i;
else if (p.Required) // implied "Failed"
{
// TODO: handle "required"
ses.Error(new ArgumentException($"{p} requires a valid value"));
break;
}
}
// Raise event
InputChanged?.Invoke(this, new ScriptEventArgs(ses, lvl.Arguments, lvl.Child));
return lvl;
}