Token precedence only applies to tokens immediately before and after the parsing dot

[Hans Aberg]

On 12 May 2009, at 09:06, Yinpeng Li wrote:

> %left OR
> %left AND
> ............................
> %%
> ............................
> predicate:    predicate OR predicate                            {
>                    $$ = new AST_PredicateTreeNode($1, $3,
> AST_PredicateTreeNode::OR) ;
>                    REGISTER_AST_NODE($$) ;
>                }
>            |    predicate AND predicate                            {
>                    $$ = new AST_PredicateTreeNode($1, $3,
> AST_PredicateTreeNode::AND) ;
>                    REGISTER_AST_NODE($$) ;
>                }
>            |    LEFT_PARENTHESIS predicate RIGHT_PARENTHESIS    {
>                    $$ = $2 ;
>                }
>            ;
>
> THE ERROR REPORT:
> state 54
>
>   17 predicate: predicate . OR predicate  [END_OF_COMMAND,
> RIGHT_PARENTHESIS, OR]
>   17          | predicate OR predicate .  [END_OF_COMMAND,
> RIGHT_PARENTHESIS, OR]
>   18          | predicate . AND predicate
>
>    AND  shift, and go to state 40
>
>    $default  reduce using rule 17 (predicate)
>
>    Conflict between rule 17 and token OR resolved as reduce (%left  
> OR).
>    Conflict between rule 17 and token AND resolved as shift (OR <  
> AND).
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