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extern/stdcxx/4.2.1/examples/manual/numpunct.cpp

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+/**************************************************************************
+ *
+ * numpunct.cpp - Example program for the numpunct facet. 
+
+ * $Id: numpunct.cpp 495453 2007-01-12 00:56:15Z sebor $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 1994-2006 Rogue Wave Software.
+ * 
+ **************************************************************************/
+
+#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;
+}