Re: [boost] Review Request: Boost.Locale

Subject: Re: [boost] Review Request: Boost.Locale
From: Artyom (artyomtnk_at_[hidden])
Date: 2010-05-25 14:20:48

> 
> The C standard describes that the zero-valued mbstate_t
> shall count as an initial state. From n1256:
> 
>   7.24.6 Extended multibyte/wide character conversion
> utilities
> 
>   ...
> 
>   3 The initial conversion state corresponds, for a
> conversion in
>     either direction, to the beginning of a new
> multibyte character in
>     the initial shift state. A zero-valued
> mbstate_t object is (at
>     least) one way to describe an initial
> conversion state.
>     A zero-valued mbstate_t object can be used to
> initiate conversion
>     involving any multibyte character sequence,
> in any LC_CTYPE
>     category setting.
> 
>   ...

Ok that is interesting, it actually allows me to keep what I need
if I know it is zeroed

Thank you, I'll take a look on it.

> 
> Also, there is the mbsinit function that allows to detect
> if the state has the initial value (just in case there are
> other initial values, other than zero-filled).

I can't really relay on mbsinit as they not available in on CRTL's

> 

> and further on, in the paragraph 5 (regarding do_unshift),
> there is a footnote that explains that the method is
> intended to return the state to the initial value
> (typically, stateT()).

That is probably the most misleading point.

If state is POD then stateT() does nothing!


Thank your for your points. I'll take a look on what can be done.

Artyom