[antlr-interest] Can't get "\<" to work in inline template rule?

[Peter Nann]

Oh, I have just got it to work using the "<<" and ">>" delimiters, which
seem to be directly replacable in place of double-quotes, even on a
single line.
 
But the lack of support in the double-quoted format is a bug, yes?
 
________________________________

From: antlr-interest-bounces at antlr.org
[mailto:antlr-interest-bounces at antlr.org] On Behalf Of Peter Nann
Sent: Wednesday, 16 April 2008 11:41 PM
To: antlr-interest at antlr.org
Subject: [antlr-interest] Can't get "\<" to work in inline template
rule?




Just starting out with what I hope should be a simple translator... 

For now, as a start, I am simply trying to turn: 
        [ a ] 
Into: 
        <one-of> a </one-of> 

But I can't get an angle bracket verbatim in the output!!! 

In the code below, you will see I am only trying to produce the first
'<'. 
Simply escaping the '<' does not seem to work as advertised... 
I have tried double, triple escaping, to no avail. 
 - Take the "\<" out of this grammar, and it works fine. 

Please help, I am a little dissappointed to have run into trouble so
early... 
Woe is me... 


Here's my Test.g file: 

---- Test.g ---- 
grammar Test; 
options {output=template; rewrite=true;} 

gslfile : orlist ; 

orlist 
        : '[' WORD ']' 
                -> template(oi={$WORD.text}) "\<one-of <oi> /one-of" 
        ; 
        
WORD : ('a'..'z'|'-'|'_'|'\'') ('a'..'z'|'-'|'_'|'\'')* ; 
WS : ( ' ' | '\t' | '\r' | '\n' )+ {$channel = HIDDEN;} ; 
----------------------------------------- 

And here's the error output: 

ANTLR Parser Generator  Version 3.0.1 (August 13, 2007)  1989-2007 
error(10):  internal error: Test.g : Test.g:8:34: expecting '"', found
'<' 
org.antlr.tool.ANTLRLexer.nextToken(ANTLRLexer.java:321) 
antlr.TokenStreamRewriteEngine.nextToken(TokenStreamRewriteEngine.java:1
61) 
antlr.TokenBuffer.fill(TokenBuffer.java:69) 
antlr.TokenBuffer.LT(TokenBuffer.java:86) 
antlr.LLkParser.LT(LLkParser.java:56) 
org.antlr.tool.ANTLRParser.rewrite_template(ANTLRParser.java:3306) 
org.antlr.tool.ANTLRParser.rewrite_alternative(ANTLRParser.java:3177) 
org.antlr.tool.ANTLRParser.rewrite(ANTLRParser.java:1885) 
org.antlr.tool.ANTLRParser.altList(ANTLRParser.java:1451) 
org.antlr.tool.ANTLRParser.rule(ANTLRParser.java:1236) 
org.antlr.tool.ANTLRParser.rules(ANTLRParser.java:655) 
org.antlr.tool.ANTLRParser.grammar(ANTLRParser.java:389) 
org.antlr.tool.Grammar.setGrammarContent(Grammar.java:521) 
org.antlr.tool.Grammar.<init>(Grammar.java:456) 
org.antlr.Tool.getGrammar(Tool.java:331) 
org.antlr.Tool.process(Tool.java:267) 
org.antlr.Tool.main(Tool.java:70) 


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