public override IEnumerable <Statement> Parse(Scanner scanner)
{
Token source = scanner.ReadTo(GetSignalKeyword(scanner)).Trim();
Token signalKeyword = scanner.ReadSignal();
yield return
(!source.IsEmpty()
? new EnsureParticipantStatement(source)
: (Statement) new MissingArgumentStatement(signalKeyword, source));
Token target = scanner.ReadTo(ColonKeyowrd).Trim();
yield return
(!target.IsEmpty()
? new EnsureParticipantStatement(target)
: (Statement) new MissingArgumentStatement(signalKeyword, target));
if (source.IsEmpty() || target.IsEmpty())
{
yield break;
}
scanner.SkipWhile(ch => !char.IsLetterOrDigit(ch));
Token signalName = scanner.ReadToEnd().Trim();
switch (signalKeyword.Value)
{
case CallKeyword:
yield return(new CallSignalStatement(signalKeyword, source, target, signalName));
break;
case BackCallKeyword:
yield return(new CallSignalStatement(signalKeyword, target, source, signalName));
break;
case ReturnKeyword:
yield return(new ReturnSignalStatement(signalKeyword, source, target, signalName));
break;
case BackReturnKeyword:
yield return(new ReturnSignalStatement(signalKeyword, target, source, signalName));
break;
case CreateKeyword1:
case CreateKeyword2:
yield return(new CreateSignalStatement(signalKeyword, source, target, signalName));
break;
default:
yield return(new UnknownStatement(signalKeyword));
break;
}
}
//participant A
//participant Long Name as A
public override IEnumerable <Statement> Parse(Scanner scanner)
{
Token keywordToken = scanner.ReadWord();
scanner.SkipWhiteSpaces();
Token nameToken = scanner.ReadTo(AsKeyword);
if (nameToken.IsEmpty())
{
yield return(new MissingArgumentStatement(keywordToken, nameToken));
yield break;
}
if (scanner.Eol)
{
yield return(new SimpleParticipantStatement(keywordToken, nameToken));
yield break;
}
scanner.ReadWord();
scanner.SkipWhiteSpaces();
Token idToken = scanner.ReadToEnd();
if (idToken.Length == 0)
{
yield return(new MissingArgumentStatement(keywordToken, idToken));
yield break;
}
yield return(new ParticipantStatement(keywordToken, idToken, nameToken));
}
