[antlr-interest] embedding Java codes to grammar problem

[Panayiotis]

Fırat KÜÇÜK wrote:
> no this is not what i want.
>
> i want to embed while statement to generated java code.
> i know what do "?+*" characters mean :)
>
Sorry, I misunderstood your level of familiarity with EBNF syntax :-)

>           { while (true) { }
>           tree_parser_rule
>           {  }  }
>
Well the most generic rule I can think of is:

rule
    :   some_subrules_and_actions ({conditional}? {action1;} subrule 
{action2;})* some_more_subrules_and_actions
    ;

This should:

parse_some_subrules_and_execute_some_actions;
while (conditional) {
    execute_action_1;
    parse_subrule;
    execute_action_2;
}
parse_some_more_subrules_and_execute_some_more_actions.

And of course 'conditional', 'action1' and 'action2' can include just 
about any valid Java code you like, including while-loops.

Hope this helps,
Panayiotis