Other notes

Mike Meyer mwm at mired.org
Thu Dec 30 22:18:54 CET 2004


Steve Holden <steve at holdenweb.com> writes:

> Mike Meyer wrote:
>
>> Steve Holden <steve at holdenweb.com> writes:
>>
> [...]
>>>
>>>Well, perhaps you can explain how a change that's made at run time
>>>(calling the decorator) can affect the parser's compile time behavior,
>>>then. At the moment, IIRC, the only way Python code can affect the
>>>parser's behavior is in the __future__ module, which must be imported
>>>at the very head of a module.
>> By modifying the parsers grammer at runtime. After all, it's just a
>> data structure that's internal to the compiler.
>>
> But the parser executes before the compiled program runs, was my
> point. What strange mixture of compilation and interpretation are you
> going to use so the parser actually understands that ".." (say) is an
> operator before the operator definition has been executed?

Ok, current decorators won't do. Clearly, any support for adding infix
operators is going to require compiler support.

          <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.



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