public static bool TryParseNode(IParser parser, out TopMenuNode node)
{
node = null;
bool result = false;
if (parser.PeekToken(TokenKind.TopMenuKeyword))
{
parser.NextToken();
result = true;
node = new TopMenuNode();
node.StartIndex = parser.Token.Span.Start;
NameExpression nameExpr;
if (NameExpression.TryParseNode(parser, out nameExpr))
{
node.MenuName = nameExpr;
}
if (parser.PeekToken(TokenKind.LeftParenthesis))
{
parser.NextToken();
MenuAttribute attrib;
while (MenuAttribute.TryParseNode(parser, out attrib, MenuComponent.Menu))
{
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 menu attributes section.");
}
}
TopMenuGroup group;
while (TopMenuGroup.TryParseNode(parser, out group))
{
node.Children.Add(group.StartIndex, group);
}
if (parser.PeekToken(TokenKind.EndKeyword))
{
parser.NextToken();
node.EndIndex = parser.Token.Span.End;
}
else
{
parser.ReportSyntaxError("Expected \"end\" token.");
}
node.EndIndex = parser.Token.Span.End;
}
return(result);
}
public static bool TryParseNode(IParser parser, out TopMenuGroup node)
{
bool result = false;
node = null;
if (parser.PeekToken(TokenKind.GroupKeyword))
{
result = true;
node = new TopMenuGroup();
parser.NextToken();
node.StartIndex = parser.Token.Span.Start;
NameExpression nameExpr;
if (NameExpression.TryParseNode(parser, out nameExpr))
{
node.Identifier = nameExpr;
if (parser.PeekToken(TokenKind.LeftParenthesis))
{
parser.NextToken();
MenuAttribute attrib;
while (MenuAttribute.TryParseNode(parser, out attrib, MenuComponent.Group))
{
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 group attributes section.");
}
}
bool continueGroup = true;
while (continueGroup)
{
switch (parser.PeekToken().Kind)
{
case TokenKind.CommandKeyword:
{
TopMenuCommand cmd;
if (TopMenuCommand.TrParseNode(parser, out cmd))
{
node.Children.Add(cmd.StartIndex, cmd);
}
else
{
parser.ReportSyntaxError("Invalid top menu command block found.");
}
}
break;
case TokenKind.SeparatorKeyword:
{
TopMenuSeparator sep;
if (TopMenuSeparator.TrParseNode(parser, out sep))
{
node.Children.Add(sep.StartIndex, sep);
}
else
{
parser.ReportSyntaxError("Invalid top menu separator block found.");
}
}
break;
case TokenKind.GroupKeyword:
{
TopMenuGroup grp;
if (TryParseNode(parser, out grp))
{
node.Children.Add(grp.StartIndex, grp);
}
else
{
parser.ReportSyntaxError("Invalid top menu group block found.");
}
}
break;
default:
continueGroup = false;
break;
}
}
if (parser.PeekToken(TokenKind.EndKeyword))
{
parser.NextToken();
node.EndIndex = parser.Token.Span.Start;
}
else
{
parser.ReportSyntaxError("Invalid token found, expected \"end\".");
}
}
else
{
parser.ReportSyntaxError("Invalid GROUP name found.");
}
}
return(result);
}
