internal static bool TryGetDialogStatement(Genero4glParser parser, out DialogStatement node, bool returnFalseInsteadOfErrors = false)
{
bool result = false;
node = null;
DialogStatement inputStmt;
if ((result = DialogStatement.TryParseNode(parser, out inputStmt, returnFalseInsteadOfErrors)))
{
node = inputStmt;
}
return(result);
}
public static bool TryParseNode(Genero4glParser parser, out DialogStatement node, bool returnFalseInsteadOfErrors = false)
{
node = new DialogStatement();
bool result = true;
switch (parser.PeekToken().Kind)
{
case TokenKind.AcceptKeyword:
case TokenKind.ContinueKeyword:
case TokenKind.ExitKeyword:
{
if (parser.PeekToken(TokenKind.DialogKeyword, 2))
{
parser.NextToken();
node.StartIndex = parser.Token.Span.Start;
parser.NextToken();
}
else
{
result = false;
}
break;
}
case TokenKind.NextKeyword:
{
parser.NextToken();
node.StartIndex = parser.Token.Span.Start;
if (parser.PeekToken(TokenKind.FieldKeyword))
{
parser.NextToken();
switch (parser.PeekToken().Kind)
{
case TokenKind.CurrentKeyword:
case TokenKind.NextKeyword:
case TokenKind.PreviousKeyword:
parser.NextToken();
break;
default:
{
// get the field-spec
FglNameExpression fieldSpec;
if (FglNameExpression.TryParseNode(parser, out fieldSpec))
{
node.FieldSpec = fieldSpec;
}
else
{
parser.ReportSyntaxError("Invalid field-spec found in dialog statement.");
}
break;
}
}
}
else
{
if (!returnFalseInsteadOfErrors)
{
parser.ReportSyntaxError("Expecting \"field\" keyword in dialog statement.");
}
else
{
return(false);
}
}
break;
}
default:
{
result = false;
break;
}
}
if (result)
{
node.EndIndex = parser.Token.Span.End;
}
return(result);
}