protected override object OnOption(INonterminalToken token)
{
if (token == null)
{
throw new ArgumentNullException(nameof(token));
}
return(new Option(token.Terminal(0).Value, token.Terminal(1).Value));
}
protected override object OnRule(INonterminalToken token)
{
if (token == null)
{
throw new ArgumentNullException(nameof(token));
}
return(NonterminalRule.From(token.Terminal(0).Value, false, Visit <IExpression>(token[1])));
}
protected override object OnGrammar(INonterminalToken token)
{
Debug.Assert(token[0].Symbol.Id == LinguId.Identifier);
var grammar = new RawGrammar(token.Terminal(0).Value);
foreach (var section in token.Nonterminal(1).Children)
{
var children = Visit <IReadOnlyList <Symbol> >(section);
grammar.Options.AddRange(children.OfType <Option>());
grammar.Terminals.AddRange(children.OfType <TerminalRule>());
grammar.Nonterminals.AddRange(children.OfType <NonterminalRule>());
}
return(grammar);
}
protected override object OnRule(INonterminalToken token)
{
return(NonterminalRule.From(token.Terminal(0).Value, false, Visit <IExpression>(token[1])));
}
protected override object OnOption(INonterminalToken token)
{
return(new Option(token.Terminal(0).Value, token.Terminal(1).Value));
}