On 06/11/2010 12:35 PM, Hartmut Kaiser wrote:
I was wondering if it was possible to get encoding-specific parsers by character type? Something like that:
template< typename CharT> struct encoding_specific { ... };
typedef encoding_specific< char> narrow; narrow::char_; // equivalent to spirit::standard::char_
typedef encoding_specific< wchar_t> wide; wide::char_; // equivalent to spirit::standard_wide::char_
This would help a lot in generic programming, when the character type is not known. Is there a tool like that already? If not, could it be added?
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?