Re: [boost] flyweight - gsoc idea - multikey-value flyweight

Subject: Re: [boost] flyweight - gsoc idea - multikey-value flyweight
From: Joaquin M LópezMuñoz (joaquin_at_[hidden])
Date: 2016-02-15 01:51:41

Vicente J. Botet Escriba <vicente.botet <at> wanadoo.fr> writes:

> Hi Joaquin,
> 
> I have a use case where I have several keys to the same flyweight.
> 
> I was trying to associate a multi-index as factory, but I don't see how 
> it could be done.
> 
> I believe that I would need something like a multikey_value<Value, 
> KeyExtractor1, KeyExtractor2>
> 
> where KeyK should be deduced from KeyExtractorK.
> 
> Have you found this use case already?
> 
> Do you think this could be a good GSoC project?

Hi Vicente

This is the first time I hear about such use case... intriguing.
Can you elaborate a bit more?

* Can you provide a motivating example?
* What are the contidions in which flyweight(k1)==flyweight(k2),
with type(k1)=K1, type(k2)=K2? Note that in thÉ•Õ±…ȁ­•äµÙ…±Õ”…Í”°)¥‘•¹Ñ¥Ñ䁽˜™±åÝ•¥¡Ñ́¥Ì‘•™¥¹•…́¥‘•¹Ñ¥Ñ䁽˜­•å̸(¨!½ÜÌÑ¡¥ÌÍÕÁÁ½Í•Ñ¼‰•¡…Ù”Ý¡•¸,Äõ,Èü()	•ÍÐ())½…Å×µ¸43ÍÁ•è5׎è)Q•±•›͹¥