numpunct.cpp

Go to the documentation of this file.

 
#include <iostream>   // for cerr, cout
#include <locale>     // for locale, numpunct, use_facet
#include <stdexcept>  // for runtime_error
 
#include <examples.h>
 
 
static std::locale
make_german_locale ()
{
    static const char* const
    locale_names [] = {
        "de_DE.ISO8859-1",       // AIX, Solaris, Tru64
        "de_DE.iso88591",        // HP-UX, Linux
        "de_DE.88591",
        "De_DE.88591",           // Reliant
        "de_DE",
        "de",                    // Linux, Solaris
        "German",
        "german",                // Linux
        "deutsch",               // Linux
        "german_germany.1252",   // Windows
        0                        // (sentinel)
    };
 
    std::locale german;
 
    // iterate over the know locale names above until a valid one
    // is found (i.e., one that doesn't cause locale to throw)
    for (const char* const *names = locale_names; ; ) {
        try {
            german = std::locale (names [0]);
            break;
        }
        catch (std::runtime_error&) {
            // continue trying until the next name is null
            if (0 == *++names)
                throw;
        }
        catch (...) {
            throw;
        }
    }
 
    return german;
}
 
 
int main ()
{
    typedef std::numpunct<char> Numpunct;
 
    try {
        // try to contruct a german locale
        const std::locale german (make_german_locale ());
 
        // obtain a numpunct facet for the german locale
        const Numpunct &np = std::use_facet<Numpunct>(german);
 
        std::cout <<   "German locale"
                  << "\nDecimal point       = " << np.decimal_point ()
                  << "\nThousands separator = " << np.thousands_sep ()
                  << "\nTrue name           = " << np.truename ()
                  << "\nFalse name          = " << np.falsename()
                  << '\n';
    }
    catch (std::runtime_error& e) {
        // a runtime_error will be thrown if the locale cannot be constructed
        std::cerr << "Caught runtime_error:\n"; 
        std::cerr << e.what () << '\n';
    }
    catch (...) {
        std::cerr << "Caught an unknown exception\n"; 
    }
    return 0;
}