Hi, ----- Original Message ----- From: "Vladimir Batov" <batov@people.net.au> To: <boost@lists.boost.org> Sent: Thursday, July 09, 2009 10:13 AM Subject: Re: [boost] [convert] coversion between strings with differentlocales

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From: "vicente.botet" <vicente.botet@wanadoo.fr> I wanted to see how we can convert a double from a locale to another locale? ...

OTOH, I'd say

string en_double = ...; double d = convert<double>::from(en_str)(locale_=en_locale); string fr_double = convert<string>::from(d)(locale_=fr_locale);

If you want to stitch it all together, it becomes a scary

string fr_double = convert<string>::from( convert<double>::from(en_str)(locale_=en_locale).value() )(locale_=fr_locale);

or as scary

string fr_double = convert<string>::from<string>( convert<double>::from(en_str)(locale_=en_locale) )(locale_=fr_locale);

you mean string fr_double = convert<string>::from<***double***>( convert<double>::from(en_str)(locale_=en_locale) )(locale_=fr_locale);

If needed, I'd probably wrap it up in a function like

template<class T> T convert(T const&, locale const&, locale const&);

There is something missing in this function. The intermediary class. Anyway I don't think we need a specific function for this specific case. I would prefer to qualify the string class be converted with formatting specifics. string fr_double = convert_to_using<fr_locale<string>, double>::from(en_locale(en_str)); which can be readen as convert from a string representing a double with the english locale to a string with a french locale. Best, Vicente