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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;
}
}
} // namespace
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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