Re: [boost] [spirit2] How to get encoding-specific parsers by character type

Subject: Re: [boost] [spirit2] How to get encoding-specific parsers by character type
From: Joel de Guzman (joel_at_[hidden])
Date: 2010-06-12 06:00:18

On 6/12/10 2:42 PM, Andrey Semashev wrote:
> On 06/12/2010 04:09 AM, Joel de Guzman wrote:
>> On 6/12/10 5:13 AM, Andrey Semashev wrote:
>>> On 06/11/2010 12:35 PM, Hartmut Kaiser wrote:
>>>> There isn't anything like that. The reason is that usually you want to
>>>> specify a character set in addition to the character type to use. So
>>>> the
>>>> solution above is nothing I would like to see in Spirit, even if it
>>>> might be
>>>> sufficient for your particular case. OTOH, if it is sufficient for you
>>>> why
>>>> don't you just add it inside your namespace and be done?
>>>
>>> Well, I did so. It just so happens that I find myself replicating that
>>> code in different places.
>>>
>>> I'm not very familiar with the standard specs on the new character types
>>> but isn't there a strong relationship between the character type and
>>> encoding? Can't we be sure that e.g. char16_t is UTF-16, char is the
>>> standard narrow and wchar_t is the standard wide encoding?
>>
>> I don't think so. I use char/UTF-8 a lot now; I don't want char to be
>> tied
>> to standard narrow.
>
> Ok, what about specifying encoding tag then?
>
> template< typename EncodingTagT >
> struct encoding_specific
> {
> ...
> };
>
> I could create my traits to deduce the default encoding by the character
> type for my case.

I'm sorry, you lost me. Could you please elaborate?

Cheers,
-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net