private static IEnumerable <TokenDefinition> ProcessNode(XElement n, Counter counter)
{
var parent = n.Parent;
var prefix = "";
if (null != parent)
{
prefix = parent.Attribute(PrefixNode)?.Value;
}
if (n.Name == "define")
{
var t = new TokenDefinition {
ExecutionPriority = int.Parse(n.Attribute("priority")?.Value ?? "0"),
ParsingPriority = counter.Increment(),
Name = n.Attribute("name")?.Value,
Signature = prefix + n.Attribute("signature")?.Value,
MatchOptions = n.Attribute("options")?.Value,
Type = Enum.Parse <TokenType>(n.Attribute("type")?.Value ?? "operator", true)
};
foreach (var e in n.Elements())
{
t.Rules.AddRange(ProcessNode(e, counter));
}
yield return(t);
}
else
{
// ReSharper disable once TailRecursiveCall
foreach (var e in n.Elements())
{
foreach (var child in ProcessNode(e, counter))
{
yield return(child);
}
}
}
}
/// <summary>
/// Registers a token with the parser
/// </summary>
/// <param name="token"></param>
/// <returns></returns>
public StandardParser RegisterToken(TokenDefinition token)
{
_tokens.Add(token);
return(this);
}
