protected virtual CascadeMessageSequenceNode ParseCascadeMessageSequenceNode(ICascadeMessageSequenceParentNode parent, Token semicolon)
{
// PARSE: <cascaded messages> ::= (';' <messages>)*
if (!Parser.IsCascadeDelimiter(semicolon))
{
this.ResidueToken = semicolon;
return(null); // Not a cascade message ... return null.
}
CascadeMessageSequenceNode result = new CascadeMessageSequenceNode(parent, (SpecialCharacterToken)semicolon);
Token token = this.GetNextTokenxx(Preference.Default);
MessageSequenceNode messages = this.ParseMessages(result, token);
if (messages == null)
{
this.ReportParserError(result, SemanticErrors.MissingMessagePattern, token);
return(result);
}
token = this.GetNextTokenxx(Preference.Default);
CascadeMessageSequenceNode nextCascade = null;
if (Parser.IsCascadeDelimiter(token))
{
nextCascade = this.ParseCascadeMessageSequenceNode(result, (SpecialCharacterToken)token);
}
else
{
this.ResidueToken = token;
}
result.SetContents(messages, nextCascade);
return(result);
}
