Re: How to do this correctly?

[Han-Wen Nienhuys]

On Thu, Jan 28, 2010 at 11:49 AM, David Kastrup <address@hidden> wrote:
> Carl Sorensen <address@hidden> writes:
>
>> On 1/28/10 7:25 AM, "David Kastrup" <address@hidden> wrote:
>>
>>> Anyway, I think that likely the ambitus engraver would be a good
>>> candidate for reimplementing as a Scheme engraver.  It would appear
>>> reasonably straightforward but not trivially so, and it is one of those
>>> things where augmenting the _code_ and behavior is likely to be better
>>> extensible in Scheme.
>>
>> I think it would be difficult to implement as a Scheme engraver,
>> because there need to be variables stored as part of the context that
>> are modified by different event handlers.  But I could be wrong.  It
>> wouldn't be the first time and is not likely to be the last.

do you mean engravers by 'event handlers' ?  I had thought the Scheme
engravers to use context properties to store internal state, but if
that is a problem, we could add another internal scope inside the C++
engraver instance to store private data.  Public data can of course be
shared as context property.

-- 
Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen