public static bool TryParseNode(Genero4glParser parser, out MessageAttribute node)
{
node = new MessageAttribute();
node.StartIndex = parser.Token.Span.Start;
bool result = true;
switch (parser.PeekToken().Kind)
{
case TokenKind.BlackKeyword:
case TokenKind.BlueKeyword:
case TokenKind.CyanKeyword:
case TokenKind.GreenKeyword:
case TokenKind.MagentaKeyword:
case TokenKind.RedKeyword:
case TokenKind.WhiteKeyword:
case TokenKind.YellowKeyword:
case TokenKind.BoldKeyword:
case TokenKind.DimKeyword:
case TokenKind.InvisibleKeyword:
case TokenKind.NormalKeyword:
case TokenKind.ReverseKeyword:
case TokenKind.BlinkKeyword:
case TokenKind.UnderlineKeyword:
parser.NextToken();
break;
case TokenKind.StyleKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expected equals token in message attribute.");
}
// get the style name
ExpressionNode styleName;
if (!FglExpressionNode.TryGetExpressionNode(parser, out styleName))
{
parser.ReportSyntaxError("Invalid style name found in message attribute.");
}
break;
}
default:
result = false;
break;
}
return(result);
}
public static bool TryParseNode(Genero4glParser parser, out MessageStatement node)
{
node = null;
bool result = false;
if (parser.PeekToken(TokenKind.MessageKeyword))
{
result = true;
node = new MessageStatement();
node.Messages = new List <ExpressionNode>();
node.Attributes = new List <MessageAttribute>();
parser.NextToken();
node.StartIndex = parser.Token.Span.Start;
while (true)
{
ExpressionNode msgExpr;
if (FglExpressionNode.TryGetExpressionNode(parser, out msgExpr))
{
node.Messages.Add(msgExpr);
}
else
{
parser.ReportSyntaxError("Invalid message expression found.");
}
if (!parser.PeekToken(TokenKind.Comma))
{
break;
}
else
{
parser.NextToken();
}
}
// get the optional attributes
if (parser.PeekToken(TokenKind.AttributesKeyword) || parser.PeekToken(TokenKind.AttributeKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.LeftParenthesis))
{
parser.NextToken();
MessageAttribute attrib;
while (MessageAttribute.TryParseNode(parser, out attrib))
{
node.Attributes.Add(attrib);
if (!parser.PeekToken(TokenKind.Comma))
{
break;
}
parser.NextToken();
}
if (parser.PeekToken(TokenKind.RightParenthesis))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expecting right-paren in display attributes section.");
}
}
else
{
parser.ReportSyntaxError("Expecting left-paren in display attributes section.");
}
}
}
return(result);
}
