[antlr-interest] Imaginary tokens warning

[G R]

Damn it.
Ok, I appologies... Just put the tokens section just after the option
section helps a lot ^^

Have a nice day :-)

2007/10/19, G R <relationalalgebra at gmail.com>:
>
> Hi,
> Creating my grammar, I'm using some imaginary tokens to create nodes for
> my AST.
> The problem is that i got some warning with my imaginary tokens.
> Here's a part of my grammar :
>
> grammar RAGrammar;
> ...
> divide    :    r1=relation Divide r2=relation
>         ->^(Divide $r1 $r2);
>
> AttributeList:;
> RenameList:;
> RenameAttribute:;
>
> Project       :    '\\u03c0';
> Select        :    '\\u03c3';
> ...
>
> And the warning messages :
> warning(208): RAGrammar.g:126:1: The following token definitions are
> unreachable: RenameList,RenameAttribute
>
> line 126 is the line defining RenameAttribute.
> Trying to have a warning free program, I'v try to define a token section
> giving the next grammar :
>
> grammar RAGrammar;
> ...
> divide    :    r1=relation Divide r2=relation
>         ->^(Divide $r1 $r2);
>
> tokens {
>         AttributeList;
>         RenameList;
>         RenameAttribute;
> }
>
> Project       :    '\\u03c0';
> Select        :    '\\u03c3';
> ...
>
> This time i got the following errors :
> error(100): RAGrammar.g:123:1: syntax error: antlr: RAGrammar.g:123:1:
> unexpected token: tokens {
> error(100): RAGrammar.g:124:15: syntax error: antlr: RAGrammar.g:124:15:
> unexpected token: ;
> error(100): RAGrammar.g:125:12: syntax error: antlr: RAGrammar.g:125:12:
> unexpected token: ;
> error(100): RAGrammar.g:126:17: syntax error: antlr: RAGrammar.g:126:17:
> unexpected token: ;
> error(106): RAGrammar.g:42:4: reference to undefined rule: divide
> error(10):  internal error: org.antlr.tool.Message.toString(Message.java:124):
> Assertion failed! Message ID 100 created but is not present in errorMsgIDs
> or warningMsgIDs.
>
> I'm a bit lost on this one. Could anyone give a hand ?
> Thanks.
>
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