Sam Barnett-Cormack schrieb:
> Patrick Schönbach wrote:
>
>> On 16.04.2009 17:29, Sam Barnett-Cormack wrote:
>>
>>> Why do you want the parse methods to be non-final? You can subclass
>>> the lexer/parser as long as the *class* isn't final. You just can't
>>> override the final methods, and it's probably not a great idea to be
>>> overriding the actual parse methods themselves.
>>>
>> For example, think of a parser that adds location info.
>>
>
> What do you mean by "location info"?
>
> Sam
>
>
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In the past I would have liked the same, but.... As a workaround you
could add for each parser method an @init and @after which calls some
custom added methods (in the @members section) which are non-final, have
some default behavior and can be overriden in a subclass of a parser. I
think this is the closest you can get to "overriden parser methods"
out-of-the-box. And also some action methods.
I.e. with Java-target
@members {
public void fooInit() { }
public void fooAfter() { }
public void fooBAR() { }
}
foo
@init {
fooInit();
}
@after {
fooAfter();
}
:
BAR { fooBAR(); }
;
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