C++ array of std::wstrings? Or Dictionary? i18n

I need a way to fetch a string, based on the current language.

Say I have 3 languages: ENGLISH, SPANISH, FRENCH

And I want to display a string representing either Metric or US units.


I was thinking maybe an array such I could access as:
unitString[SPANISH][METRIC];

Open in new window

would give me the Spanish name for the metric units (of whatever I'm measuring).

But I don't really like that idea. Maybe it's OK.

(If this was .NET code I would look into using Dictionary. But it's unmanaged C++ code.)

Would be nice if all the strings can be initialized in one place. The strings don't change, they're static.

Well so far a 2-D array of std::wstrings is the only idea I've come up with. Is there a better way? How would I define a 2-D static array of std::wstrings and initialize them?


(My other even worse idea was create a whole bunch of strings:
SpanishMetric = "..."
EnglishMetric = "...";
FrenchMetric = "...";
EnglishUS = "...";
SpanishUS = "...";
FrenchUS = "...";

then a nasty case statement:
switch(language)
{
    case ENGLISH:
    switch(unit)
    {
       case METRIC:
           return EnglishMetric;
       case US:
           return EnglishUS;
    }
   case SPANISH:
     ...
    }
well that's not nice at all. Very hard to add a language to that mess...
Must be a better way...
deleydSoftware EngineerAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

evilrixSenior Software Engineer (Avast)Commented:
Well, one way or another you'll need a lookup table, but I'd be inclined to store this in a file using JSON or XML (or something similar) and then load this at runtime. As for the data structure, maybe a map of pairs?

std::map<std::wstring, std::pair<std::wstring, std::wstring>> lookup_table;

...

auto const & metric = lookup_table[L"spanish"].first;
auto const & imperial = lookup_table[L"spanish"].second;

Open in new window

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
jkrCommented:
BTW, if you are on Windows, you might be reinventig the wheel, since the system stores that info as well, e.g.

TCHAR buf[256];
GetLocalInfo(MAKELCID(MAKELANGID(LANG_SPANISH,SUBLANG_DEFAULT),LOCALE_IMEASURE,buf,sizeof(buf));

Open in new window

deleydSoftware EngineerAuthor Commented:
OK std::map looks good. I'll look into that.

(Sorry target isn't Microsoft Windows, though we develop the code on Windows.)
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C++

From novice to tech pro — start learning today.