[convert] coversion between strings with different locales

[Vicente Botet Escriba]

Hi,

I wanted to see how we can convert a double from a locale to another locale?
Should I write

double d =convert<string>::from(convert<double>::from(str)(_locale=f))(_locale=t);

or I need

double d = convert<double>::from(str)(_locale=f);
convert<string>::from(d)(_locale=d);

Or it si a better way?

Best,
_____________________
Vicente Juan Botet Escribá
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[Vicente Botet Escriba]

Some syntax errors

string str_out =convert<string>::from(convert<double>::from(str)(_locale=f))(_locale=t);

double d = convert<double>::from(str)(_locale=f);
string str_out = convert<string>::from(d)(_locale=d);

Thanks,
Vicente

----- Original Message -----
From: "vicente.botet" <vicente.botet@...>
To: <boost@...>
Sent: Thursday, July 09, 2009 9:11 AM
Subject: [boost] [convert] coversion between strings with different locales



Hi,

I wanted to see how we can convert a double from a locale to another locale?
Should I write

double d =convert<string>::from(convert<double>::from(str)(_locale=f))(_locale=t);

or I need

double d = convert<double>::from(str)(_locale=f);
convert<string>::from(d)(_locale=d);

Or it si a better way?

Best,
_____________________
Vicente Juan Botet Escribá
_______________________________________________
Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost


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[Vladimir Batov]

> From: "vicente.botet" <vicente.botet@...>
> 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);

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

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

V.

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[Vicente Botet Escriba]

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

>
>> From: "vicente.botet" <vicente.botet@...>
>> 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
 


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