[antlr-interest] rule is ambiguous (tree grammar)
jeroen.v.schagen at gmail.com
jeroen.v.schagen at gmail.com
Sun Aug 16 01:39:48 PDT 2009
Nevermind the above question, the problem was caused by a $markupChain
reference in my action code.
On Aug 16, 2009 10:33am, jeroen.v.schagen at gmail.com wrote:
> The below parser grammar works, however when copying the rewrite rules
> into my tree grammar (as stated in the book). I seem to get the following
> error: reference $markupChain is ambiguous; rule markupChain is enclosing
> rule and referenced in the production (assuming enclosing rule). Anybody
> knows a solution that will fix my tree grammar?
> Thanks in advance,
> Jeroen
> Parser grammar
> markupChain: markup markupChain
> -> ^( MARKUP_CHAIN markup markupChain )
> | expression ';'
> -> ^( MARKUP_CHAIN expression ';' )
> | statement
> -> ^( MARKUP_CHAIN statement )
> | embedding ';'
> -> ^( MARKUP_CHAIN embedding ';' )
> | ';'
> -> ^( MARKUP_CHAIN ';' ) ;
> Tree grammar
> markupChain: ^( MARKUP_CHAIN markup markupChain )
> | ^( MARKUP_CHAIN expression ';' )
> | ^( MARKUP_CHAIN statement )
> | ^( MARKUP_CHAIN embedding ';' )
> | ^( MARKUP_CHAIN ';' ) ;
> URL:
> http://code.google.com/p/waebric/source/browse/trunk/implementations/java/antlr/src/main/grammar/
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