private static void ParseRule(Tree tree, Token token, Token[] tokens, ref int index)
{
if (token is Identifier)
{
var ruleToken = token;
var rule = new Rule { Identifier = token.Value };
token = NextToken(tokens, ref index);
if (IsDefinition(token))
{
token = NextToken(tokens, ref index);
rule.Expression = ParseExpression(tree, ref token, tokens, ref index, ';');
tree.Add(rule);
}
else
{
ruleToken.Position += 2;
tree.Errors.Add(CreateError(ruleToken, string.Format(ErrorStrings.ExpectedDefinition, token == null ? "nothing" : token.Value)));
}
}
else
{
tree.Errors.Add(CreateError(token, ErrorStrings.RulesMustBeginWithIdentifier));
}
}
public void Add(Rule rule)
{
Rules.Add(rule);
}