string GetExpecting ()
{
int [] tokens = yyExpectingTokens (yyExpectingState);
var names = new List<string> (tokens.Length);
bool has_type = false;
bool has_identifier = false;
for (int i = 0; i < tokens.Length; i++){
int token = tokens [i];
has_identifier |= token == Token.IDENTIFIER;
string name = GetTokenName (token);
if (name == "<internal>")
continue;
has_type |= name == "type";
if (names.Contains (name))
continue;
names.Add (name);
}
//
// Too many tokens to enumerate
//
if (names.Count > 8)
return null;
if (has_type && has_identifier)
names.Remove ("identifier");
if (names.Count == 1)
return "`" + GetTokenName (tokens [0]) + "'";
StringBuilder sb = new StringBuilder ();
names.Sort ();
int count = names.Count;
for (int i = 0; i < count; i++){
bool last = i + 1 == count;
if (last)
sb.Append ("or ");
sb.Append ('`');
sb.Append (names [i]);
sb.Append (last ? "'" : count < 3 ? "' " : "', ");
}
return sb.ToString ();
}