Re: [boost] [log] Comments

Subject: Re: [boost] [log] Comments
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-03-15 18:49:14

AMDG

Andrey Semashev wrote:
>>> Yes. attr is a formatter and a filter, for example.
>>
>> Oh, indeed! But.. why? Cannot one object serve both roles?
>
> One is filter and the other is formatter. They have different 
> interfaces (with regard to the library and the user)

Are the interfaces incompatible?

> and serve different purposes (one - to compose filters, the other - 
> formatters).

Why does this matter?  spirit uses the same placeholders in both
qi and karma, for instance.

> Also, thread safety requirements are different.

Why?  In any sane implementation that I can think of,
both attr's should store the same immutable data.

In Christ,
Steven Watanabe