string - Is there a system for internationalizing C++ streams? -



string - Is there a system for internationalizing C++ streams? -

i'm looking how internationalize c++ projects, , didn't take me long wonder how 1 handles translation of streamed text that's interspersed non-string values. page i've found far mentions this c++ fqa page, though page unfortunately isn't interested in offering solutions. there's this boost mailing list thread 2000 doesn't appear go anywhere.

as example, c-style printf statement:

printf("there %d lines in '%s'.", numlines, filename);

it's trivial wrap entire message in sort of translation function, such gettext's various functions, , allow text , nonliteral components moved around needed. if have access posix version of printf (or other library offering improvements printf format), can arrange values in different order needed.

however, equivalent c++ stream-based statement:

std::cout << "there " << numlines << "lines in '" << filename << "'.";

i have yet find way mark entire message translation. wrap each string in appropriate functions, requires translator know these 3 strings part of 1 message, , appears between them. additionally, @ to the lowest degree i18n solutions need told other occurrences of same string literal distinct, languages content of literal changes based on context. , forget situations you'd have rearrange non-string-literal values.

so question is, there internationalization solution out there supports utilize of streaming operations, or there printf-style solutions concerns raised?

boost.format can help:

cout << boost::format("there %d lines in '%s'.") % numlines % filename;

or

cout << boost::format("there %1% lines in '%2%'.") % numlines % filename;

c++ string internationalization

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