[boost] Re: Re: Formal Review: Command Line & Config library

From: Vladimir Prus (ghost_at_[hidden])
Date: 2003-05-27 23:33:35

Matthias Troyer wrote:

> 
> On Tuesday, May 27, 2003, at 05:44 PM, John Torjo wrote:
> 
>>>> - does not work for wchar_t. While this might seem silly, it's not,
>> since
>>>> VC allows for a TCHAR* command line string.
>>>
>>> I have to consider this. An obvious approach would be to add template
>>> parameter to every class, telling which char type to use. So
>>> investigation
>>> is needed to find alternatives --- making everything a template would
>>> conflict with ability to compiler everything as shared library.
>>>
>>
>> I don't think we need a template param.
>> Just something like 'boost::program_options::char_type', which is by
>> default
>> char, and can be changed.
>>
>> It's not like we have multiple command lines or something ;-)
> 
> We could have some programs that use plain ASCII characters, and some
> programs that want to support Unicode filenames. We should thus still
> have support for both narrow and wide characters, and not just one
> character type.

I think the point is that you hardly want both ascii and unicode in single
program. In that case two versions of shared library can be built: for
ascii and unicode, and you will link to the desired one. It's actually
not necessary to add templates --- probably preprocessor will do.

- Volodya