[antlr-interest] Illegal escape sequence in C#

[Gavin Lambert]

At 07:27 31/07/2008, rkevinburton at charter.net wrote:
 >			else if (lt.Type == EOL || (lt.Type == MultiLineComment &&
 >Regex.IsMatch(lt.Text, "/.*\r\n|\r|\n")))
 >			{
 >				// We found our EOL: promote the token to on channel, 
position
 >the input on it and reset the rule start.
 >				lt.Channel = Token.DEFAULT_CHANNEL;
 >				input.Seek(lt.TokenIndex);
 >				if (rule != null)
 >				{
 >					rule.start = lt;
 >				}
 >				break;
 >			}

Generally in action code you should be using ANTLR's automatic 
substitution attributes.  So use '$rule.start', not 
'rule.start'.  Then the codegen will automatically convert it to 
use the Start property -- and handle cases where the local 
variable isn't called 'rule' any more.

(Maybe ANTLR should encourage this better by doing what it did in 
v2 -- adding a unique numeric suffix to each variable [and also 
munging members like 'type' in the lexer].  That way it'll 
basically force people to use the $ syntax, which will help 
insulate them against changes in the codegen...)