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- // locale_info.cpp ---------------------------------------------------------//
- // Copyright Beman Dawes 2011
- // Distributed under the Boost Software License, Version 1.0.
- // See http://www.boost.org/LICENSE_1_0.txt
- #include <locale>
- #include <iostream>
- #include <exception>
- #include <cstdlib>
- using namespace std;
- #ifdef _MSC_VER
- # pragma warning(push)
- # pragma warning(disable: 4996) // ... Function call with parameters that may be unsafe
- #endif
- namespace
- {
- void facet_info(const locale& loc, const char* msg)
- {
- cout << "has_facet<std::codecvt<wchar_t, char, std::mbstate_t> >("
- << msg << ") is "
- << (has_facet<std::codecvt<wchar_t, char, std::mbstate_t> >(loc)
- ? "true\n"
- : "false\n");
- }
- void default_info()
- {
- try
- {
- locale loc;
- cout << "\nlocale default construction OK" << endl;
- facet_info(loc, "locale()");
- }
- catch (const exception& ex)
- {
- cout << "\nlocale default construction threw: " << ex.what() << endl;
- }
- }
- void null_string_info()
- {
- try
- {
- locale loc("");
- cout << "\nlocale(\"\") construction OK" << endl;
- facet_info(loc, "locale(\"\")");
- }
- catch (const exception& ex)
- {
- cout << "\nlocale(\"\") construction threw: " << ex.what() << endl;
- }
- }
- void classic_info()
- {
- try
- {
- locale loc(locale::classic());
- cout << "\nlocale(locale::classic()) copy construction OK" << endl;
- facet_info(loc, "locale::classic()");
- }
- catch (const exception& ex)
- {
- cout << "\nlocale(locale::clasic()) copy construction threw: " << ex.what() << endl;
- }
- }
- }
- int main()
- {
- const char* lang = getenv("LANG");
- cout << "\nLANG environmental variable is "
- << (lang ? lang : "not present") << endl;
- default_info();
- null_string_info();
- classic_info();
- return 0;
- }
- #ifdef _MSC_VER
- # pragma warning(pop)
- #endif
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